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Kim DK, Lee KC, Kim JK. Sacroiliitis in inflammatory bowel disease on abdominal computed tomography: prevalence, misses, and associated factors. Scand J Rheumatol 2024:1-7. [PMID: 38686835 DOI: 10.1080/03009742.2024.2337453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 03/28/2024] [Indexed: 05/02/2024]
Abstract
OBJECTIVE To evaluate the prevalence and rate of a missed diagnosis of sacroiliitis on abdominal computed tomography (CT) in patients with inflammatory bowel disease (IBD). Factors associated with sacroiliitis were also assessed. METHOD This retrospective study included 210 patients with IBD (mean age 31.1 years) who underwent abdominal CT. Based on a validated abdominal CT scoring tool, bilateral sacroiliac (SI) joints on abdominal CT in the whole study population were retrospectively reviewed. Subsequently, patients were classified into the 'patients with sacroiliitis' group and the 'patients without sacroiliitis' group. Univariate and multivariate regression analyses were used to clarify the factors associated with sacroiliitis. RESULTS Sacroiliitis was identified in 26 out of 210 patients (12.4%). However, sacroiliitis was recognized on the primary reading in only five of these 26 patients (19.2%) and was missed on the initial report in the remaining 21 patients (80.8%). Among the 21 patients, 20 (95.2%) were finally diagnosed with axial spondyloarthritis (axSpA). There was a higher prevalence of female sex (p = 0.04), upper gastrointestinal involvement (p = 0.04), and back pain (p < 0.01) in patients with sacroiliitis than in those without sacroiliitis. However, on multivariate analysis, back pain was the only factor associated with sacroiliitis (p = 0.01). CONCLUSION Physicians should carefully evaluate SI joints on abdominal CT in patients with IBD to enable early detection of sacroiliitis, potentially leading to an early diagnosis of axSpA. In addition, if patients with IBD present with back pain, the possibility of sacroiliitis should be considered.
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Affiliation(s)
- D K Kim
- Department of Radiology, The Armed Forces Capital Hospital, Seongnam, Republic of Korea
- Department of Radiology, Severance Hospital, Research Institute of Radiological Science, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - K-C Lee
- Department of Radiology, The Armed Forces Capital Hospital, Seongnam, Republic of Korea
- Department of Radiology, Korea University Anam Hospital, Seoul, Republic of Korea
| | - J K Kim
- Department of Radiology, The Armed Forces Capital Hospital, Seongnam, Republic of Korea
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Ghafoor F, Kim H, Ghafoor B, Rehman S, Asghar Khan M, Aziz J, Rabeel M, Faheem Maqsood M, Dastgeer G, Lee MJ, Farooq Khan M, Kim DK. Interface engineering in ZnO/CdO hybrid nanocomposites to enhanced resistive switching memory for neuromorphic computing. J Colloid Interface Sci 2024; 659:1-10. [PMID: 38157721 DOI: 10.1016/j.jcis.2023.12.084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 11/29/2023] [Accepted: 12/13/2023] [Indexed: 01/03/2024]
Abstract
Resistive random-access memory (RRAMs) has attracted significant interest for their potential applications in embedded storage and neuromorphic computing. Materials based on metal chalcogenides have emerged as promising candidates for the fulfilment of these requirements. Due to its ability to manipulate electronic states and control trap states through controlled compositional dynamics, metal chalcogenide RRAM has excellent non-volatile resistive memory properties. In the present we have synthesized ZnO-CdO hybrid nanocomposite by using hydrothermal method as an active layer. The Ag/C15ZO/Pt hybrid nanocomposite structure memristors showed electrical properties similar to biological synapses. The device exhibited remarkably stable resistive switching properties that have a low SET/RESET (0.41/-0.2) voltage, a high RON/OFF ratio of approximately 105, a high retention stability, excellent endurance reliability up to 104 cycles and multilevel device storage performance by controlling the compliance current. Furthermore, they exhibited an impressive performance in terms of emulating biological synaptic functions, which include long-term potentiation (LTP), long-term depression (LTD), and paired-pulse facilitation (PPF), via the continuous modulation of conductance. The hybrid nanocomposite memristors notably achieved an impressive recognition accuracy of up to 92.6 % for handwritten digit recognition under artificial neural network (ANN). This study shows that hybrid-nanocomposite memristor performance could lead to efficient future neuromorphic architectures.
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Affiliation(s)
- Faisal Ghafoor
- Department of Electrical Engineering and Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Republic of Korea
| | - Honggyun Kim
- Department of Semiconductor Systems Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Bilal Ghafoor
- PPGE3M, Federal University of Rio Grande do Sul, Porto Alegre /RS, Brazil
| | - Shania Rehman
- Department of Semiconductor Systems Engineering, Sejong University, Seoul 05006, Republic of Korea
| | | | - Jamal Aziz
- Chair of Smart Sensor Systems, University of Wuppertal, Wuppertal, Germany
| | - Muhammad Rabeel
- Department of Electrical Engineering and Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Republic of Korea
| | - Muhammad Faheem Maqsood
- Department of Nanotechnology and Advanced Materials Engineering, Sejong University, 05006 Seoul, Republic of Korea
| | - Ghulam Dastgeer
- Department of Physics and Astronomy, Sejong University, Seoul 05006, Korea
| | - Myoung-Jae Lee
- Institute of Conversion Daegu Gyeongbuk Institute of Science and Technology (DGIST)., Daegu 42988, Republic of Korea.
| | - Muhammad Farooq Khan
- Department of Electrical Engineering and Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Republic of Korea.
| | - Deok-Kee Kim
- Department of Electrical Engineering and Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Republic of Korea; Department of Semiconductor Systems Engineering, Sejong University, Seoul 05006, Republic of Korea.
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Pattanshetti A, Koli A, Dhabbe R, Yu XY, Motkuri RK, Chavan VD, Kim DK, Sabale S. Polymer Waste Valorization into Advanced Carbon Nanomaterials for Potential Energy and Environment Applications. Macromol Rapid Commun 2024; 45:e2300647. [PMID: 38243849 DOI: 10.1002/marc.202300647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 12/23/2023] [Indexed: 01/22/2024]
Abstract
The rise in universal population and accompanying demands have directed toward an exponential surge in the generation of polymeric waste. The estimate predicts that world-wide plastic production will rise to ≈590 million metric tons by 2050, whereas 5000 million more tires will be routinely abandoned by 2030. Handling this waste and its detrimental consequences on the Earth's ecosystem and human health presents a significant challenge. Converting the wastes into carbon-based functional materials viz. activated carbon, graphene, and nanotubes is considered the most scientific and adaptable method. Herein, this world provides an overview of the various sources of polymeric wastes, modes of build-up, impact on the environment, and management approaches. Update on advances and novel modifications made in methodologies for converting diverse types of polymeric wastes into carbon nanomaterials over the last 5 years are given. A remarkable focus is made to comprehend the applications of polymeric waste-derived carbon nanomaterials (PWDCNMs) in the CO2 capture, removal of heavy metal ions, supercapacitor-based energy storage and water splitting with an emphasis on the correlation between PWDCNMs' properties and their performances. This review offers insights into emerging developments in the upcycling of polymeric wastes and their applications in environment and energy.
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Affiliation(s)
- Akshata Pattanshetti
- Department of Chemistry, Jaysingpur College Jaysingpur (Shivaji University Kolhapur), Jaysingpur, 416101, India
| | - Amruta Koli
- Department of Chemistry, Jaysingpur College Jaysingpur (Shivaji University Kolhapur), Jaysingpur, 416101, India
| | - Rohant Dhabbe
- Department of Chemistry, Jaysingpur College Jaysingpur (Shivaji University Kolhapur), Jaysingpur, 416101, India
| | - Xiao-Ying Yu
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA
| | - Radha Kishan Motkuri
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, 99354, USA
| | - Vijay D Chavan
- Department of Electrical Engineering and Convergence Engineering for Intelligent Drone, Sejong University, Seoul, 05006, South Korea
| | - Deok-Kee Kim
- Department of Electrical Engineering and Convergence Engineering for Intelligent Drone, Sejong University, Seoul, 05006, South Korea
| | - Sandip Sabale
- Department of Chemistry, Jaysingpur College Jaysingpur (Shivaji University Kolhapur), Jaysingpur, 416101, India
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Ali Sheikh Z, Vikraman D, Faizan M, Kim H, Aftab S, F Shaikh S, Nam KW, Jung J, Hussain S, Kim DK. Formulation of Hierarchical Nanowire-Structured CoNiO 2 and MoS 2/CoNiO 2 Hybrid Composite Electrodes for Supercapacitor Applications. ACS Appl Mater Interfaces 2024; 16:10104-10115. [PMID: 38361321 DOI: 10.1021/acsami.3c17201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
Hierarchical porous nanowire-like MoS2/CoNiO2 nanohybrids were synthesized via the hydrothermal process. CoNiO2 nanowires were selected due to the edge site, high surface/volume ratio, and superior electrochemical characteristics as the porous backbone for decoration of layered MoS2 nanoflakes to construct innovative structure hierarchical three-dimensional (3D) porous NWs MoS2/CoNiO2 hybrids with excellent charge accumulation and efficient ion transport capabilities. Physicochemical analyses were conducted on the developed hybrid composite, revealing conclusive evidence that the CoNiO2 nanowires have been securely anchored onto the surface of the MoS2 nanoflake array. The electrochemical results strongly proved the benefit of the hierarchical 3D porous MoS2/CoNiO2 hybrid structure for the charge storage kinetics. The synergistic characteristics arising from the MoS2/CoNiO2 composite yielded a notably high specific capacitance of 1340 F/g at a current density of 0.5 A/g. Furthermore, the material exhibited sustained cycling stability, retaining 95.6% of its initial capacitance after 10 000 long cycles. The asymmetric device comprising porous MoS2/CoNiO2//activated carbon encompassed outstanding energy density (93.02 Wh/kg at 0.85 kW/kg) and cycling stability (94.1% capacitance retention after 10 000 cycles). Additionally, the successful illumination of light-emitting diodes underscores the significant potential of the synthesized MoS2/CoNiO2 (2D/1D) hybrid for practical high-energy storage applications.
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Affiliation(s)
- Zulfqar Ali Sheikh
- Department of Electrical Engineering and Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Korea
| | - Dhanasekaran Vikraman
- Division of Electronics and Electrical Engineering, Dongguk University─Seoul, Seoul 04620, Korea
| | - Muhammad Faizan
- Department of Energy & Materials Engineering, Dongguk University─Seoul, Seoul 04620, Korea
| | - Honggyun Kim
- Department of Semiconductor Systems Engineering, Sejong University, Seoul 05006, Korea
| | - Sikandar Aftab
- Department of Intelligent Mechatronics Engineering, Sejong University, Seoul 05006, Korea
| | - Shoyebmohamad F Shaikh
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Kyung-Wan Nam
- Department of Energy & Materials Engineering, Dongguk University─Seoul, Seoul 04620, Korea
| | - Jongwan Jung
- Hybrid Materials Center (HMC) and Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Korea
| | - Sajjad Hussain
- Hybrid Materials Center (HMC) and Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Korea
| | - Deok-Kee Kim
- Department of Electrical Engineering and Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Korea
- Department of Semiconductor Systems Engineering, Sejong University, Seoul 05006, Korea
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Chavan VD, Kim H, Choi KK, Kim SK, Kim DK. In-situtemperature-dependent sheet resistance study of Cu films in oxygen ambient for heterogeneous integrations. Nanotechnology 2024; 35:165204. [PMID: 38198719 DOI: 10.1088/1361-6528/ad1d13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 01/10/2024] [Indexed: 01/12/2024]
Abstract
Controlling and preventing Cu oxidation is crucial for improving the performance and reliability of Cu-Cu bonding. Ni-B films were selectively deposited on Cu films to block the Cu oxidation. The resistivity changes of the Cu films in N2and O2ambient were measured by using a four-point probe in thein situtemperature-dependent resistance measurements at the temperature from room temperature to 400 °C. The resistivity changes of the 100 nm thick Cu films without Ni-B increased rapidly at a higher temperature (284 °C) in the O2ambiance. The change of resistivity-increase of 100 nm thick Cu with ∼50 nm thick Ni-B (top) film was lower than the Cu films without Ni-B films due to the blocking diffusion of O2atoms by the Ni-B films. The resistivity-change and oxidation barrier properties were studied using scanning electron microscopy, FIB, transmission electron microscopy, EDX, and secondary ion mass spectroscopy tools. The proposed article will be helpful for the upcoming advancement in Cu-Cu bonding using selected-area deposition.
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Affiliation(s)
- Vijay D Chavan
- Department of Electrical Engineering and Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Republic of Korea
| | - Honggyun Kim
- Semiconductor Systems Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Kyeong-Keun Choi
- National Institute for Nanomaterials Technology (NINT), Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Sung-Kyu Kim
- National Institute for Nanomaterials Technology (NINT), Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Deok-Kee Kim
- Department of Electrical Engineering and Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Republic of Korea
- Semiconductor Systems Engineering, Sejong University, Seoul 05006, Republic of Korea
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Patil H, Rehman S, Kim H, Kadam KD, Khan MA, Khan K, Aziz J, Ismail M, Khan MF, Kim DK. Effect of growth temperature on self-rectifying BaTiO 3/ZnO heterojunction for high-density crossbar arrays and neuromorphic computing. J Colloid Interface Sci 2023; 652:836-844. [PMID: 37625358 DOI: 10.1016/j.jcis.2023.08.105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 08/11/2023] [Accepted: 08/16/2023] [Indexed: 08/27/2023]
Abstract
In the quest for high-density integration and massive scalability, ferroelectric-based devices provide an achievable approach for nonvolatile crossbar array (CBA) architecture and neuromorphic computing. In this report, ferroelectric-semiconductor (Pt/BaTiO3/ZnO/Au) heterojunction-based devices are demonstrated to exhibit nonvolatile and synaptic characteristics. In this study, the ferroelectric (BaTiO3) layer was modulated at various growth temperatures of 350 °C, 450 °C, 550 °C and 650 °C. Growing temperature in the ferroelectric layer has a significant impact on resistive switching. The ferroelectricity of the BaTiO3 thin film enhanced by increasing temperature causes a substantial shift in the interface state density at heterojunction interface, which is crucial for self-rectification. Furthermore, this self-rectifying property advances to reduce the crosstalk problem without any selector device. Enhanced resistive switching and neuromorphic applications have been demonstrated using BaTiO3 heterostructure devices at 550 °C. The dynamic ferroelectric polarization switching in this heterojunction demonstrated linear conductance change in artificial synapses with 91 % recognition accuracy. Ferroelectric polarization reversal with a depletion region at the heterojunction interface is the responsible mechanism for the switching in these devices. Thus, these findings pave the way for designing low power high-density crossbar arrays and neuromorphic application based on ferroelectric-semiconductor heterostructures.
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Affiliation(s)
- Harshada Patil
- Department of Electrical Engineering, Sejong University, Seoul 05006, Republic of Korea; Department of Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Republic of Korea
| | - Shania Rehman
- Department of Semiconductor Systems Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Honggyun Kim
- Department of Semiconductor Systems Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Kalyani D Kadam
- Department of Electrical Engineering, Sejong University, Seoul 05006, Republic of Korea; Department of Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Republic of Korea
| | - Muhammad Asghar Khan
- Department of Physics and Graphene Research Institute, Sejong University, Seoul 05006, Republic of Korea
| | - Karim Khan
- School of Electrical Engineering & Intelligentization, Dongguan University of Technology, Dongguan 523808, China
| | - Jamal Aziz
- Department of Electrical Engineering, Sejong University, Seoul 05006, Republic of Korea; Department of Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Republic of Korea
| | - Muhammad Ismail
- Division of Electronics and Electrical Engineering, Dongguk University, Seoul 04620, Republic of Korea
| | - Muhammad Farooq Khan
- Department of Electrical Engineering, Sejong University, Seoul 05006, Republic of Korea.
| | - Deok-Kee Kim
- Department of Electrical Engineering, Sejong University, Seoul 05006, Republic of Korea; Department of Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Republic of Korea; Department of Semiconductor Systems Engineering, Sejong University, Seoul 05006, Republic of Korea.
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Lee DH, Rabeel M, Han Y, Kim H, Khan MF, Kim DK, Yoo H. Self-Assembled Monolayer Doping for MoTe 2 Field-Effect Transistors: Overcoming PN Doping Challenges in Transition Metal Dichalcogenides. ACS Appl Mater Interfaces 2023. [PMID: 37878262 DOI: 10.1021/acsami.3c11430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
Transition metal dichalcogenides (TMDs) have gained significant attention as next-generation semiconductor materials that could potentially overcome the integration limits of silicon-based electronic devices. However, a challenge in utilizing TMDs as semiconductors is the lack of an established PN doping method to effectively control their electrical properties, unlike those of silicon-based semiconductors. Conventional PN doping methods, such as ion implantation, can induce lattice damage in TMDs. Thus, chemical doping methods that can control the Schottky barrier while minimizing lattice damage are desirable. Here, we focus on the molybdenum ditelluride (2H-MoTe2), which has a hexagonal phase and exhibits ambipolar field-effect transistor (FET) properties due to its direct band gap of 1.1 eV, enabling concurrent transport of electrons and holes. We demonstrate the fabrication of p- or n-type unipolar FETs in ambipolar MoTe2 FETs using self-assembled monolayers (SAMs) as chemical dopants. Specifically, we employ 1H,1H,2H,2H perfluorooctyltriethoxysilane and (3-aminopropyl)triethoxysilane as SAMs for chemical doping. The selective SAMs effectively increase the hole and electron charge transport capabilities in MoTe2 FETs by 18.4- and 4.6-fold, respectively, due to the dipole effect of the SAMs. Furthermore, the Raman shift of MoTe2 by SAM coating confirms the successful p- and n-type doping. Finally, we demonstrate the fabrication of complementary inverters using SAMs-doped MoTe2 FETs, which exhibit clear full-swing capability compared to undoped complementary inverters.
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Affiliation(s)
- Dong Hyun Lee
- Electronic Engineering, Gachon University, 1342 Seongnam-daero, Seongnam 13120, Republic of Korea
| | - Muhammad Rabeel
- Department of Electrical Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, Korea
- Department of Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Korea
| | - Youngmin Han
- Electronic Engineering, Gachon University, 1342 Seongnam-daero, Seongnam 13120, Republic of Korea
| | - Honggyun Kim
- Department of Semiconductor Systems Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, Korea
| | - Muhammad Farooq Khan
- Department of Electrical Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, Korea
| | - Deok-Kee Kim
- Department of Semiconductor Systems Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, Korea
- Department of Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Korea
| | - Hocheon Yoo
- Electronic Engineering, Gachon University, 1342 Seongnam-daero, Seongnam 13120, Republic of Korea
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Kowalchuk RO, Mullikin TC, Spears GM, Rose PS, Siontis BL, Kim DK, Costello BA, Morris JM, Gao RW, Shiraishi S, Lucido J, Olivier K, Owen D, Stish BJ, Waddle MR, Laack Ii NN, Park SS, Brown PD, Merrell KW. Assessment of Minimum Dose as a Strong Predictor of Local Failure after Spine SBRT. Int J Radiat Oncol Biol Phys 2023; 117:e120-e121. [PMID: 37784669 DOI: 10.1016/j.ijrobp.2023.06.909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Stereotactic body radiation therapy (SBRT) has demonstrated robust clinical benefits in carefully selected patients, improving local control and even overall survival (OS). Even so, a wide range of dose-fractionation schemes are used in clinical practice. We seek to assess a large database to determine clinical and dosimetric predictors of local failure after spine SBRT. MATERIALS/METHODS From a large institutional database, spine SBRT treatments with subsequent imaging follow-up to assess local control were identified. Patients were treated with a simultaneous integrated boost technique using 1 or 3 fractions, generally delivering 20-24 Gy in 1 fraction to the high dose volume and 16 Gy to the low dose volume (or 30-36 Gy and 24 Gy for 3 fraction treatments). Exclusions included: lack of imaging follow-up, proton therapy, and benign primary histologies. Statistical analyses included Cox proportional hazards analyses and the robust log-rank statistic for cut-point analysis. The cumulative incidence of local failure with death as a competing risk was considered as the primary endpoint. RESULTS A total of 522 eligible spine SBRT treatments (68% single fraction) were identified in 377 unique patients. Patients had a median OS of 43.7 months (95% confidence interval: 34.3-54.4). The cumulative incidence of local failure was 19.3% (15.3-23.2) at 1 year and 25.6% (21.1-29.9) at 2 years. Univariate analysis identified that the minimum dose (normalized for the prescription dose) was a strong predictor of local failure (p = 0.0093). Among patients treated with a single fraction, statistical significance was maintained (p = 0.024). No other dosimetric factors were predictive of local failure. In a cut point analysis, the log-rank statistic was maximized at 15.8 Gy minimum dose for single-fraction treatment (HR = 0.51, 95% CI: 0.34 - 0.75, p = 0.0009). Cumulative incidence of local failure was 15.1% (9.8-20.2) vs. 24.7% (17.2-31.5) at 1 year using this cut-off. Comparable local control was demonstrated with a minimum dose of 14 Gy (HR = 0.57, 95%: 0.37 - 0.87, p = 0.009), with reduced local control with lower minimum doses. Among a range of clinical factors assessed, only epidural and soft tissue involvement were predictive of local failure (HR = 1.80 and 1.98, respectively). Multivariable analyses incorporating soft tissue involvement, epidural extension, and multilevel disease confirmed the 15.8 Gy cutoff for single fraction cases (HR = 0.58, 95% CI: 0.38-0.88, p = 0.011). CONCLUSION Spine SBRT offers favorable local control using a range of dose-fractionation schemes; however, minimum dose has a strong association with local control, unlike any other dosimetric factors tested. Furthermore, statistical significance was maintained even when considering epidural extension and potential limitations from dose to the spinal cord. Our data suggests that the minimum dose should be prioritized during treatment planning, ideally to at least 14 - 15.8 Gy for single fraction.
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Affiliation(s)
- R O Kowalchuk
- University of Virginia / Riverside Radiosurgery Center, Newport News, VA
| | - T C Mullikin
- Department of Radiation Oncology, Duke University, Rochester, MN
| | - G M Spears
- Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN
| | - P S Rose
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN
| | - B L Siontis
- Division of Medical Oncology, Mayo Clinic, Rochester, MN
| | - D K Kim
- Department of Radiology, Mayo Clinic, Rochester, MN
| | - B A Costello
- Division of Medical Oncology, Mayo Clinic, Rochester, MN
| | - J M Morris
- Department of Radiology, Mayo Clinic, Rochester, MN
| | - R W Gao
- Department of Radiation Oncology, Mayo Clinic, Rochester, MN
| | - S Shiraishi
- Department of Radiation Oncology, Mayo Clinic, Rochester, MN
| | - J Lucido
- Department of Radiation Oncology, Mayo Clinic, Rochester, MN
| | - K Olivier
- Department of Radiation Oncology, Mayo Clinic, Rochester, MN
| | - D Owen
- Department of Radiation Oncology, Mayo Clinic, Rochester, MN
| | - B J Stish
- Department of Radiation Oncology, Mayo Clinic, Rochester, MN
| | - M R Waddle
- Department of Radiation Oncology, Mayo Clinic, Rochester, MN
| | - N N Laack Ii
- Department of Radiation Oncology, Mayo Clinic, Rochester, MN
| | - S S Park
- Department of Radiation Oncology, Mayo Clinic, Rochester, MN
| | - P D Brown
- Department of Radiation Oncology, Mayo Clinic, Rochester, MN
| | - K W Merrell
- Department of Radiation Oncology, Mayo Clinic, Rochester, MN
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Ustad RE, Kundale SS, Rokade KA, Patil SL, Chavan VD, Kadam KD, Patil HS, Patil SP, Kamat RK, Kim DK, Dongale TD. Recent progress in energy, environment, and electronic applications of MXene nanomaterials. Nanoscale 2023; 15:9891-9926. [PMID: 37097309 DOI: 10.1039/d2nr06162g] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Since the discovery of graphene, two-dimensional (2D) materials have gained widespread attention, owing to their appealing properties for various technological applications. Etched from their parent MAX phases, MXene is a newly emerged 2D material that was first reported in 2011. Since then, a lot of theoretical and experimental work has been done on more than 30 MXene structures for various applications. Given this, in the present review, we have tried to cover the multidisciplinary aspects of MXene including its structures, synthesis methods, and electronic, mechanical, optoelectronic, and magnetic properties. From an application point of view, we explore MXene-based supercapacitors, gas sensors, strain sensors, biosensors, electromagnetic interference shielding, microwave absorption, memristors, and artificial synaptic devices. Also, the impact of MXene-based materials on the characteristics of respective applications is systematically explored. This review provides the current status of MXene nanomaterials for various applications and possible future developments in this field.
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Affiliation(s)
- Ruhan E Ustad
- Computational Electronics and Nanoscience Research Laboratory, School of Nanoscience and Biotechnology, Shivaji University, Kolhapur-416004, India.
- Department of Electrical Engineering and Convergence Engineering for Intelligent Drone, Sejong University, Seoul, Korea.
| | - Somnath S Kundale
- Computational Electronics and Nanoscience Research Laboratory, School of Nanoscience and Biotechnology, Shivaji University, Kolhapur-416004, India.
| | - Kasturi A Rokade
- Computational Electronics and Nanoscience Research Laboratory, School of Nanoscience and Biotechnology, Shivaji University, Kolhapur-416004, India.
| | - Snehal L Patil
- Computational Electronics and Nanoscience Research Laboratory, School of Nanoscience and Biotechnology, Shivaji University, Kolhapur-416004, India.
| | - Vijay D Chavan
- Department of Electrical Engineering and Convergence Engineering for Intelligent Drone, Sejong University, Seoul, Korea.
| | - Kalyani D Kadam
- Department of Electrical Engineering and Convergence Engineering for Intelligent Drone, Sejong University, Seoul, Korea.
| | - Harshada S Patil
- Department of Electrical Engineering and Convergence Engineering for Intelligent Drone, Sejong University, Seoul, Korea.
| | - Sarita P Patil
- School of Physical Science, Sanjay Ghodawat University, Atigre, Kolhapur-416118, MH, India
| | - Rajanish K Kamat
- Department of Electronics, Shivaji University, Kolhapur-416004, India
- Dr Homi Bhabha State University, 15, Madam Cama Road, Mumbai-400032, India
| | - Deok-Kee Kim
- Department of Electrical Engineering and Convergence Engineering for Intelligent Drone, Sejong University, Seoul, Korea.
| | - Tukaram D Dongale
- Computational Electronics and Nanoscience Research Laboratory, School of Nanoscience and Biotechnology, Shivaji University, Kolhapur-416004, India.
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Amrhein TJ, Williams JW, Gray L, Malinzak MD, Cantrell S, Deline CR, Carr CM, Kim DK, Goldstein KM, Kranz PG. Efficacy of Epidural Blood Patching or Surgery in Spontaneous Intracranial Hypotension: A Systematic Review and Evidence Map. AJNR Am J Neuroradiol 2023; 44:730-739. [PMID: 37202114 PMCID: PMC10249694 DOI: 10.3174/ajnr.a7880] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 04/21/2023] [Indexed: 05/20/2023]
Abstract
BACKGROUND Spontaneous intracranial hypotension is an important cause of treatable secondary headaches. Evidence on the efficacy of epidural blood patching and surgery for spontaneous intracranial hypotension has not been synthesized. PURPOSE Our aim was to identify evidence clusters and knowledge gaps in the efficacy of treatments for spontaneous intracranial hypotension to prioritize future research. DATA SOURCES We searched published English language articles on MEDLINE (Ovid), the Web of Science (Clarivate), and EMBASE (Elsevier) from inception until October 29, 2021. STUDY SELECTION We reviewed experimental, observational, and systematic review studies assessing the efficacy of epidural blood patching or surgery in spontaneous intracranial hypotension. DATA ANALYSIS One author performed data extraction, and a second verified it. Disagreements were resolved by consensus or adjudicated by a third author. DATA SYNTHESIS One hundred thirty-nine studies were included (median, 14 participants; range, 3-298 participants). Most articles were published in the past decade. Most assessed epidural blood patching outcomes. No studies met level 1 evidence. Most were retrospective cohort or case series (92.1%, n = 128). A few compared the efficacy of different treatments (10.8%, n = 15). Most used objective methods for the diagnosis of spontaneous intracranial hypotension (62.3%, n = 86); however, 37.7% (n = 52) did not clearly meet the International Classification of Headache Disorders-3 criteria. CSF leak type was unclear in 77.7% (n = 108). Nearly all reported patient symptoms using unvalidated measures (84.9%, n = 118). Outcomes were rarely collected at uniform prespecified time points. LIMITATIONS The investigation did not include transvenous embolization of CSF-to-venous fistulas. CONCLUSIONS Evidence gaps demonstrate a need for prospective study designs, clinical trials, and comparative studies. We recommend using the International Classification of Headache Disorders-3 diagnostic criteria, explicit reporting of CSF leak subtype, inclusion of key procedural details, and using objective validated outcome measures collected at uniform time points.
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Affiliation(s)
- T J Amrhein
- From the Department of Radiology (T.J.A., L.G., M.D.M., P.G.K.), Duke University Medical Center, Durham, North Carolina
| | - J W Williams
- Division of General Internal Medicine (J.W.W., K.M.G.)
- Durham Center of Innovation to Accelerate Discovery and Practice Transformation (J.W.W., K.M.G.), Durham Veterans Affairs Health Care System, Durham, North Carolina
| | - L Gray
- From the Department of Radiology (T.J.A., L.G., M.D.M., P.G.K.), Duke University Medical Center, Durham, North Carolina
| | - M D Malinzak
- From the Department of Radiology (T.J.A., L.G., M.D.M., P.G.K.), Duke University Medical Center, Durham, North Carolina
| | - S Cantrell
- Duke University Medical Center Library (S.C.), Duke University School of Medicine, Durham, North Carolina
| | - C R Deline
- Spinal CSF Leak Foundation (C.R.D.), Spokane, Washington
| | - C M Carr
- Department of Radiology (C.M.C., D.K.K.), Mayo Clinic, Rochester, Minnesota
| | - D K Kim
- Department of Radiology (C.M.C., D.K.K.), Mayo Clinic, Rochester, Minnesota
| | - K M Goldstein
- Division of General Internal Medicine (J.W.W., K.M.G.)
- Durham Center of Innovation to Accelerate Discovery and Practice Transformation (J.W.W., K.M.G.), Durham Veterans Affairs Health Care System, Durham, North Carolina
| | - P G Kranz
- From the Department of Radiology (T.J.A., L.G., M.D.M., P.G.K.), Duke University Medical Center, Durham, North Carolina
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11
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Wagle S, Benson JC, Madhavan AA, Carr CM, Garza I, Diehn FE, Kim DK. The clue is in the kidneys: greater renal contrast medium accumulation on ipsilateral side down CT myelogram after lateral decubitus digital subtraction myelogram as a predictor of laterality of cerebrospinal fluid leak. Clin Radiol 2023:S0009-9260(23)00173-3. [PMID: 37225571 DOI: 10.1016/j.crad.2023.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 03/31/2023] [Accepted: 04/23/2023] [Indexed: 05/26/2023]
Abstract
AIM To assess the potential correlation of the laterality of a cerebrospinal fluid (CSF)-venous fistula with the laterality of decubitus computed tomography (CT) myelogram (post decubitus digital subtraction myelogram) based on which side demonstrated more renal contrast medium excretion. MATERIALS AND METHODS Patients with CSF-venous fistulas diagnosed at lateral decubitus digital subtraction myelograms were reviewed retrospectively. Patients who did not have CT myelogram following one or both left and right lateral decubitus digital subtraction myelograms were excluded. Two neuroradiologists independently interpreted the CT myelogram for the presence or absence of renal contrast, and whether subjectively more renal contrast medium was visualised on the left or right lateral decubitus CT myelogram. RESULTS Renal contrast medium was seen in lateral decubitus CT myelograms in 28 of 30 (93.3%) patients with CSF-venous fistulas. Having more renal contrast medium in right lateral decubitus CT myelogram was 73.9% sensitive and 71.4% specific for the diagnosis of a right-sided CSF-venous fistula, whereas having more renal contrast medium in the left lateral decubitus CT myelogram was 71.4% sensitive and 82.6% specific for a left-sided CSF-venous fistula (p=0.02). CONCLUSION When the CSF-venous fistula lies on the dependent side of a decubitus CT myelogram performed after decubitus digital subtraction myelogram, relatively more renal contrast medium is visualised compared to when the fistula lies on the non-dependent side.
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Affiliation(s)
- S Wagle
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
| | - J C Benson
- Department of Radiology, Mayo Clinic, Rochester, MN, USA.
| | - A A Madhavan
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
| | - C M Carr
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
| | - I Garza
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
| | - F E Diehn
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
| | - D K Kim
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
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12
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Siminski CP, Carr CM, Kallmes DF, Oien MP, Atkinson JLD, Benson JC, Diehn FE, Kim DK, Liebo GB, Lehman VT, Madhavan AA, Mark IT, Morris PP, Shlapak DP, Verdoorn JT, Morris JM. Fluoroscopy- and CT-Guided Gold Fiducial Marker Placement for Intraoperative Localization during Spinal Surgery: Review of 179 Cases at a Single Institution-Technique and Safety Profile. AJNR Am J Neuroradiol 2023; 44:618-622. [PMID: 37080723 PMCID: PMC10171395 DOI: 10.3174/ajnr.a7854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 03/16/2023] [Indexed: 04/22/2023]
Abstract
BACKGROUND AND PURPOSE Wrong-level spinal surgery, especially in the thoracic spine, remains a challenge for a variety of reasons related to visualization, such as osteopenia, large body habitus, severe kyphosis, radiographic misinterpretation, or anatomic variation. Preoperative fiducial marker placement performed in a dedicated imaging suite has been proposed to facilitate identification of thoracic spine vertebral levels. In this current study, we report our experience using image-guided percutaneous gold fiducial marker placement to enhance the accuracy and safety of thoracic spinal surgical procedures. MATERIALS AND METHODS A retrospective review was performed of all fluoroscopy- or CT-guided gold fiducial markers placed at our institution between January 3, 2019, and March 16, 2022. A chart review of 179 patients was performed detailing the procedural approach and clinical information. In addition, the method of gold fiducial marker placement (fluoroscopy/CT), procedure duration, spinal level of the gold fiducial marker, radiation dose, fluoroscopy time, surgery date, and complications (including whether wrong-level surgery occurred) were recorded. RESULTS A total of 179 patients (104 female) underwent gold fiducial marker placement. The mean age was 57 years (range, 12-96 years). Fiducial marker placement was performed by 13 different neuroradiologists. All placements were technically successful without complications. All 179 (100%) operations were performed at the correct level. Most fiducial markers (143) were placed with fluoroscopy with the most common location at T6-T8. The most common location for placement in CT was at T3 and T4. CONCLUSIONS All operations guided with gold fiducial markers were performed at the correct level. There were no complications of fiducial marker placement.
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Affiliation(s)
- C P Siminski
- From the Mayo Clinic Alix School of Medicine (C.P.S.)
| | - C M Carr
- Department of Radiology (C.M.C., D.F.K., M.P.O., F.E.D., D.K.K., G.B.L., V.T.L., A.A.M., I.T.M., P.P.M., D.P.S., J.T.V., J.M.M.), Mayo Clinic, Rochester, Minnesota
| | - D F Kallmes
- Department of Radiology (C.M.C., D.F.K., M.P.O., F.E.D., D.K.K., G.B.L., V.T.L., A.A.M., I.T.M., P.P.M., D.P.S., J.T.V., J.M.M.), Mayo Clinic, Rochester, Minnesota
| | - M P Oien
- Department of Radiology (C.M.C., D.F.K., M.P.O., F.E.D., D.K.K., G.B.L., V.T.L., A.A.M., I.T.M., P.P.M., D.P.S., J.T.V., J.M.M.), Mayo Clinic, Rochester, Minnesota
| | | | - J C Benson
- Department of Neuroradiology (J.L.D.A., J.C.B.)
| | - F E Diehn
- Department of Radiology (C.M.C., D.F.K., M.P.O., F.E.D., D.K.K., G.B.L., V.T.L., A.A.M., I.T.M., P.P.M., D.P.S., J.T.V., J.M.M.), Mayo Clinic, Rochester, Minnesota
| | - D K Kim
- Department of Radiology (C.M.C., D.F.K., M.P.O., F.E.D., D.K.K., G.B.L., V.T.L., A.A.M., I.T.M., P.P.M., D.P.S., J.T.V., J.M.M.), Mayo Clinic, Rochester, Minnesota
| | - G B Liebo
- Department of Radiology (C.M.C., D.F.K., M.P.O., F.E.D., D.K.K., G.B.L., V.T.L., A.A.M., I.T.M., P.P.M., D.P.S., J.T.V., J.M.M.), Mayo Clinic, Rochester, Minnesota
| | - V T Lehman
- Department of Radiology (C.M.C., D.F.K., M.P.O., F.E.D., D.K.K., G.B.L., V.T.L., A.A.M., I.T.M., P.P.M., D.P.S., J.T.V., J.M.M.), Mayo Clinic, Rochester, Minnesota
| | - A A Madhavan
- Department of Radiology (C.M.C., D.F.K., M.P.O., F.E.D., D.K.K., G.B.L., V.T.L., A.A.M., I.T.M., P.P.M., D.P.S., J.T.V., J.M.M.), Mayo Clinic, Rochester, Minnesota
| | - I T Mark
- Department of Radiology (C.M.C., D.F.K., M.P.O., F.E.D., D.K.K., G.B.L., V.T.L., A.A.M., I.T.M., P.P.M., D.P.S., J.T.V., J.M.M.), Mayo Clinic, Rochester, Minnesota
| | - P P Morris
- Department of Radiology (C.M.C., D.F.K., M.P.O., F.E.D., D.K.K., G.B.L., V.T.L., A.A.M., I.T.M., P.P.M., D.P.S., J.T.V., J.M.M.), Mayo Clinic, Rochester, Minnesota
| | - D P Shlapak
- Department of Radiology (C.M.C., D.F.K., M.P.O., F.E.D., D.K.K., G.B.L., V.T.L., A.A.M., I.T.M., P.P.M., D.P.S., J.T.V., J.M.M.), Mayo Clinic, Rochester, Minnesota
| | - J T Verdoorn
- Department of Radiology (C.M.C., D.F.K., M.P.O., F.E.D., D.K.K., G.B.L., V.T.L., A.A.M., I.T.M., P.P.M., D.P.S., J.T.V., J.M.M.), Mayo Clinic, Rochester, Minnesota
| | - J M Morris
- Department of Radiology (C.M.C., D.F.K., M.P.O., F.E.D., D.K.K., G.B.L., V.T.L., A.A.M., I.T.M., P.P.M., D.P.S., J.T.V., J.M.M.), Mayo Clinic, Rochester, Minnesota
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13
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Rehman S, Khan MA, Kim H, Patil H, Aziz J, Kadam KD, Rehman MA, Rabeel M, Hao A, Khan K, Kim S, Eom J, Kim DK, Khan MF. Optically Reconfigurable Complementary Logic Gates Enabled by Bipolar Photoresponse in Gallium Selenide Memtransistor. Adv Sci (Weinh) 2023:e2205383. [PMID: 37076923 DOI: 10.1002/advs.202205383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 03/01/2023] [Indexed: 05/03/2023]
Abstract
To avoid the complexity of the circuit for in-memory computing, simultaneous execution of multiple logic gates (OR, AND, NOR, and NAND) and memory behavior are demonstrated in a single device of oxygen plasma-treated gallium selenide (GaSe) memtransistor. Resistive switching behavior with RON /ROFF ratio in the range of 104 to 106 is obtained depending on the channel length (150 to 1600 nm). Oxygen plasma treatment on GaSe film created shallow and deep-level defect states, which exhibit carriers trapping/de-trapping, that lead to negative and positive photoconductance at positive and negative gate voltages, respectively. This distinguishing feature of gate-dependent transition of negative to positive photoconductance encourages the execution of four logic gates in the single memory device, which is elusive in conventional memtransistor. Additionally, it is feasible to reversibly switch between two logic gates by just adjusting the gate voltages, e.g., NAND/NOR and AND/NAND. All logic gates presented high stability. Additionally, memtransistor array (1×8) is fabricated and programmed into binary bits representing ASCII (American Standard Code for Information Interchange) code for the uppercase letter "N". This facile device configuration can provide the functionality of both logic and memory devices for emerging neuromorphic computing.
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Affiliation(s)
- Shania Rehman
- Department of Semiconductor System Engineering, Sejong University, Seoul, 05006, Republic of Korea
| | - Muhammad Asghar Khan
- Department of Physics & Astronomy and Graphene Research Institute, Sejong University, Seoul, 05006, Republic of Korea
| | - Honggyun Kim
- Department of Semiconductor System Engineering, Sejong University, Seoul, 05006, Republic of Korea
| | - Harshada Patil
- Department of Electrical Engineering, Sejong University, Seoul, 05006, Republic of Korea
| | - Jamal Aziz
- Department of Electrical Engineering, Sejong University, Seoul, 05006, Republic of Korea
| | - Kalyani D Kadam
- Department of Convergence Engineering for Intelligent Drone, Sejong University, Seoul, 05006, South Korea
| | - Malik Abdul Rehman
- Department of Chemical Engineering, New Uzbekistan University, Tashkent, 100007, Uzbekistan
| | - Muhammad Rabeel
- Department of Electrical Engineering, Sejong University, Seoul, 05006, Republic of Korea
| | - Aize Hao
- State Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, Xinjiang, 830017, P. R. China
| | - Karim Khan
- School of Mechanical Engineering, Dongguan University of Technology, Dongguan, 523808, P. R. China
| | - Sungho Kim
- Department of Semiconductor System Engineering, Sejong University, Seoul, 05006, Republic of Korea
| | - Jonghwa Eom
- Department of Physics & Astronomy and Graphene Research Institute, Sejong University, Seoul, 05006, Republic of Korea
| | - Deok-Kee Kim
- Department of Semiconductor System Engineering, Sejong University, Seoul, 05006, Republic of Korea
- Department of Convergence Engineering for Intelligent Drone, Sejong University, Seoul, 05006, South Korea
| | - Muhammad Farooq Khan
- Department of Electrical Engineering, Sejong University, Seoul, 05006, Republic of Korea
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14
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Patil H, Kim H, Kadam KD, Rehman S, Patil SA, Aziz J, Dongale TD, Ali Sheikh Z, Khalid Rahmani M, Khan MF, Kim DK. Flexible Organic-Inorganic Halide Perovskite-Based Diffusive Memristor for Artificial Nociceptors. ACS Appl Mater Interfaces 2023; 15:13238-13248. [PMID: 36867070 DOI: 10.1021/acsami.2c16481] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
With the current evolution in the artificial intelligence technology, more biomimetic functions are essential to execute increasingly complicated tasks and respond to challenging work environments. Therefore, an artificial nociceptor plays a significant role in the advancement of humanoid robots. Organic-inorganic halide perovskites (OHPs) have the potential to mimic the biological neurons due to their inherent ion migration. Herein, a versatile and reliable diffusive memristor built on an OHP is reported as an artificial nociceptor. This OHP diffusive memristor showed threshold switching properties with excellent uniformity, forming-free behavior, a high ION/IOFF ratio (104), and bending endurance over >102 cycles. To emulate the biological nociceptor functionalities, four significant characteristics of the artificial nociceptor, such as threshold, no adaptation, relaxation, and sensitization, are demonstrated. Further, the feasibility of OHP nociceptors in artificial intelligence is being investigated by fabricating a thermoreceptor system. These findings suggest a prospective application of an OHP-based diffusive memristor in the future neuromorphic intelligence platform.
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Affiliation(s)
- Harshada Patil
- Department of Electrical Engineering, Sejong University, 209-Neungdong-ro, Gwangjin-gu, 05006 Seoul, Republic of Korea
| | - Honggyun Kim
- Department of Electrical Engineering, Sejong University, 209-Neungdong-ro, Gwangjin-gu, 05006 Seoul, Republic of Korea
| | - Kalyani D Kadam
- Department of Electrical Engineering, Sejong University, 209-Neungdong-ro, Gwangjin-gu, 05006 Seoul, Republic of Korea
- Department of Convergence Engineering for Intelligent Drone, Sejong University, 05006 Seoul, Republic of Korea
| | - Shania Rehman
- Department of Electrical Engineering, Sejong University, 209-Neungdong-ro, Gwangjin-gu, 05006 Seoul, Republic of Korea
| | - Supriya A Patil
- Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Jamal Aziz
- Department of Electrical Engineering, Sejong University, 209-Neungdong-ro, Gwangjin-gu, 05006 Seoul, Republic of Korea
| | - Tukaram D Dongale
- Computational Electronics and Nanoscience Research Laboratory, School of Nanoscience and Biotechnology, Shivaji University, Kolhapur 416004, India
| | - Zulfqar Ali Sheikh
- Department of Electrical Engineering, Sejong University, 209-Neungdong-ro, Gwangjin-gu, 05006 Seoul, Republic of Korea
- Department of Convergence Engineering for Intelligent Drone, Sejong University, 05006 Seoul, Republic of Korea
| | - Mehr Khalid Rahmani
- School of Electronics Engineering, Chungbuk National University, Cheongju 28644, Republic of Korea
| | - Muhammad Farooq Khan
- Department of Electrical Engineering, Sejong University, 209-Neungdong-ro, Gwangjin-gu, 05006 Seoul, Republic of Korea
| | - Deok-Kee Kim
- Department of Electrical Engineering, Sejong University, 209-Neungdong-ro, Gwangjin-gu, 05006 Seoul, Republic of Korea
- Department of Convergence Engineering for Intelligent Drone, Sejong University, 05006 Seoul, Republic of Korea
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15
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Huls SJ, Shlapak DP, Kim DK, Leng S, Carr CM. Reply. AJNR Am J Neuroradiol 2023; 44:E17. [PMID: 36822825 PMCID: PMC10187820 DOI: 10.3174/ajnr.a7803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Affiliation(s)
- S J Huls
- Department of RadiologyMayo Clinic, Ringgold Standard InstitutionRochester, Minnesota
| | - D P Shlapak
- Department of RadiologyMayo Clinic, Ringgold Standard InstitutionRochester, Minnesota
| | - D K Kim
- Department of RadiologyMayo Clinic, Ringgold Standard InstitutionRochester, Minnesota
| | - S Leng
- Department of RadiologyMayo Clinic, Ringgold Standard InstitutionRochester, Minnesota
| | - C M Carr
- Department of RadiologyMayo Clinic, Ringgold Standard InstitutionRochester, Minnesota
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16
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Kwon W, Chang SA, Jeon K, Bak M, Park TK, Yang JH, Kim DK. Pulmonary arterial angioplasty in peripheral pulmonary arterial stenosis in RNF213 vasculopathy: effective but high-risk treatment with reperfusion injury. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
p.Arg4810Lys variant of the ring finger protein 213 (RNF213) vasculopathy is a nonsyndromatic vasculopathy involving multisystemic organs including pulmonary arteries. Peripheral pulmonary arterial stenosis (PPAS) with diffuse stenosis and beaded appearance is a unique feature of this disease and no treatment option has been tried before.
Methods
We performed BPA for PPAS in RNF213 patients (n=7). Severity of pulmonary hypertension was assessed by echocardiography and right heart catheterization at the baseline. Several clinical and hemodynamic parameters were followed up after each BPA sessions.
Results
All of the patients had dyspnea on exertion. Right ventricular dysfunction was observed in six patients and NT-proBNP was elevated (949.2±1148.1 pg/mL). Baseline echocardiography showed severe pulmonary hypertension (70.1±19.2 mmHg). Pulmonary arterial ballooning was performed to all patients, but stenting (n=6) and cutting balloon (n=1) was necessary due to elastic recoil. Improvement of clinical and hemodynamic parameters was achieved in six patients after 5.3 sessions of BPA in average. Reperfusion edema was seen in four patients, eventually leading to death in one patient.
Conclusions
Pulmonary arterial angioplasty, when coupled with stenting, is an effective treatment for PPAS with RNF213 vasculopathy. Although reperfusion injury was common and fatal in a few cases, it is the only modality to improve the patient's symptom and hemodynamics till now. Careful selection of the target population should be preceded to perform the intervention.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- W Kwon
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - S A Chang
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - K Jeon
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - M Bak
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - T K Park
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - J H Yang
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - D K Kim
- Samsung Medical Center , Seoul , Korea (Republic of)
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Huls SJ, Shlapak DP, Kim DK, Leng S, Carr CM. Utility of Dual-Energy CT to Improve Diagnosis of CSF Leaks on CT Myelography following Lateral Decubitus Digital Subtraction Myelography with Negative Findings. AJNR Am J Neuroradiol 2022; 43:1539-1543. [PMID: 36574327 PMCID: PMC9575522 DOI: 10.3174/ajnr.a7628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 07/12/2022] [Indexed: 01/26/2023]
Abstract
CSF leaks, including CSF-venous fistulas, which cause spontaneous intracranial hypotension, remain difficult to diagnose, even on digital subtraction myelography and CT myelography. Dual-energy CT technology has been used to improve diagnostic utility within multiple organ systems. The capability of dual-energy CT to create virtual monoenergetic images can be leveraged to increase conspicuity of contrast in CSF-venous fistulas and direct epidural CSF leakage to improve the diagnostic utility of CT myelography. Six cases (in 5 patients) are shown in which virtual monoenergetic images demonstrate a leak location that was either occult or poorly visible on high- or low-kilovolt series. This clinical report describes the novel application of dual-energy CT for the detection of subtle CSF leaks including CSF-venous fistulas.
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Affiliation(s)
- S J Huls
- From the Department of Radiology, Mayo Clinic, Ringgold Standard Institution, Rochester, Minnesota
| | - D P Shlapak
- From the Department of Radiology, Mayo Clinic, Ringgold Standard Institution, Rochester, Minnesota
| | - D K Kim
- From the Department of Radiology, Mayo Clinic, Ringgold Standard Institution, Rochester, Minnesota
| | - S Leng
- From the Department of Radiology, Mayo Clinic, Ringgold Standard Institution, Rochester, Minnesota
| | - C M Carr
- From the Department of Radiology, Mayo Clinic, Ringgold Standard Institution, Rochester, Minnesota
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18
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Babcock JC, Johnson DR, Benson JC, Kim DK, Luetmer PH, Shlapak DP, Cross CP, Johnson MP, Cutsforth-Gregory JK, Carr CM. Diffuse Calvarial Hyperostosis and Spontaneous Intracranial Hypotension: A Case-Control Study. AJNR Am J Neuroradiol 2022; 43:978-983. [PMID: 35772803 DOI: 10.3174/ajnr.a7557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 05/06/2022] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Diagnosing spontaneous intracranial hypotension and associated CSF leaks can be challenging, and additional supportive imaging findings would be useful to direct further evaluation. This retrospective study evaluated whether there was a difference in the prevalence of calvarial hyperostosis in a cohort of patients with spontaneous intracranial hypotension compared with an age- and sex-matched control population. MATERIALS AND METHODS Cross-sectional imaging (CT of the head or brain MR imaging examinations) for 166 patients with spontaneous intracranial hypotension and 321 matched controls was assessed by neuroradiologists blinded to the patient's clinical status. The readers qualitatively evaluated the presence of diffuse or layered calvarial hyperostosis and measured calvarial thickness in the axial and coronal planes. RESULTS A significant difference in the frequency of layered hyperostosis (31.9%, 53/166 subjects versus 5.0%, 16/321 controls, P < .001, OR = 11.58) as well as the frequency of overall (layered and diffuse) hyperostosis (38.6%, 64/166 subjects versus 13.2%, 42/321 controls, P < .001, OR = 4.66) was observed between groups. There was no significant difference in the frequency of diffuse hyperostosis between groups (6.6%, 11/166 subjects versus 8.2%, 26/321 controls, P = .465). A significant difference was also found between groups for calvarial thickness measured in the axial (P < .001) and coronal (P < .001) planes. CONCLUSIONS Layered calvarial hyperostosis is more prevalent in spontaneous intracranial hypotension compared with the general population and can be used as an additional noninvasive brain imaging marker of spontaneous intracranial hypotension and an underlying spinal CSF leak.
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Affiliation(s)
- J C Babcock
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - D R Johnson
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - J C Benson
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - D K Kim
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - P H Luetmer
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - D P Shlapak
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - C P Cross
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - M P Johnson
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | | | - C M Carr
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
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19
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Shlapak D, Kim DK, Diehn FE, Benson JC, Lehman VT, Liebo GB, Morris JM, Morris PP, Verdoom JT, Carr CM. Reply. AJNR Am J Neuroradiol 2021; 42:E45. [PMID: 33888455 DOI: 10.3174/ajnr.a7126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- D Shlapak
- Department of RadiologyMayo ClinicRochester, Minnesota
| | - D K Kim
- Department of RadiologyMayo ClinicRochester, Minnesota
| | - F E Diehn
- Department of RadiologyMayo ClinicRochester, Minnesota
| | - J C Benson
- Department of RadiologyMayo ClinicRochester, Minnesota
| | - V T Lehman
- Department of RadiologyMayo ClinicRochester, Minnesota
| | - G B Liebo
- Department of RadiologyMayo ClinicRochester, Minnesota
| | - J M Morris
- Department of RadiologyMayo ClinicRochester, Minnesota
| | - P P Morris
- Department of RadiologyMayo ClinicRochester, Minnesota
| | - J T Verdoom
- Department of RadiologyMayo ClinicRochester, Minnesota
| | - C M Carr
- Department of RadiologyMayo ClinicRochester, Minnesota
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20
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Abstract
OBJECTIVE This retrospective study investigated the nature and severity of venom-induced consumption coagulopathy (VICC) and determined the clotting factors involved in VICC in patients after envenomation by South Korea's snakes. Additionally, we studied the effectiveness of antivenom for the treatment of VICC after envenomation. METHODS Included patients were divided into three groups according to the severity of VICC (no VICC, partial VICC, and complete VICC). Data, including changes in coagulation parameters during hospitalization and clotting factors at presentation, were collected and analyzed. RESULTS One hundred nineteen patients who presented at our emergency department within 3 h after snake envenomation were included. VICC developed in 34 patients (27 patients with partial VICC and 7 patients with complete VICC). Two of 34 patients with VICC required blood transfusions. Five patients with complete VICC had an undetectable fibrinogen concentration at presentation. Three patients with complete VICC had an unmeasurable INR and aPTT within 24 h. The median times of the most extreme values were 10 h for INR, 12 h for aPTT, and 16 h for fibrinogen after presentation in the VICC group. The D-dimer concentration peaked at a median of 63.5 h after presentation. The activities of factors II and X were significantly reduced in the complete VICC group (factor II: 88 (84-99.3)% in the non-VICC group vs. 69 (49.5-83.5)% in the complete VICC group; factor X:94 (83-102) in the non-VICC group vs. 70 (66.5-79.8)% in the complete VICC group), while there was no difference in factor V activity at presentation. The time from bite to first antivenom administration did not correlate with the time course and most extreme concentrations for fibrinogen and D-dimer within the VICC groups. DISCUSSION AND CONCLUSION VICC occurs in approximately one-quarter of snakebite patients in South Korea; however, VICC itself does not appear to lead to clinical deterioration. Fibrinogen is an early diagnostic maker for complete VICC. Clotting factors II and X are involved in VICC. Future investigations should explore the mechanism of VICC from Korean snakebites and the effect of antivenom on VICC.
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Affiliation(s)
- J M Moon
- Department of Emergency Medicine, Chonnam National University Medical School, Gwangju, Republic of Korea.,Department of Emergency Medicine, Chonnam National University Hwasun Hospital, Jeollanam-do, Republic of Korea
| | - B J Chun
- Department of Emergency Medicine, Chonnam National University Medical School, Gwangju, Republic of Korea.,Department of Emergency Medicine, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Y S Cho
- Department of Emergency Medicine, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - J C Kim
- Department of Emergency Medicine, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Y J Koo
- Department of Agricultural Chemistry, Chonnam National University, Gwangju, Republic of Korea
| | - K H Park
- Department of Emergency Medical Rescue, Nambu University, Gwangju, Republic of Korea.,Department of Medical science, Chonnam National University Graduate School, Gwangju, Republic of Korea
| | - S D Lee
- Department of Emergency Medicine in Trauma Center, Wonkwang University Hospital, Iksan, Republic of Korea
| | - J S Ahn
- Department of Internal Medicine, Chonnam National University Hwasun Hospital, Jeollanam-do, Republic of Korea
| | - D K Kim
- Department of Emergency Medicine, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - S J Ryu
- Department of Emergency Medicine, Chonnam National University Hospital, Gwangju, Republic of Korea
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21
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Benson JC, Giannini C, Cohen Cohen S, Van Gompel J, Kim DK, Port J, Diehn F, Eckel L, Carr C. Optic Nerve Choristoma Mimicking a Neurenteric Cyst. AJNR Am J Neuroradiol 2021; 42:228-232. [PMID: 33303524 DOI: 10.3174/ajnr.a6892] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 08/27/2020] [Indexed: 11/07/2022]
Abstract
Optic nerve choristomas are rare entities in which a developmental focus of histologically normal tissue is abnormally located within or along a segment of the optic nerve. Although benign, choristomas may demonstrate slow growth, ultimately resulting in visual field deficits due to compression of the adjacent nerve in the few cases reported in the anterior fossa. Choristomas may have cystic components, though this has not been described in such lesions along the optic nerve. Here, a predominantly cystic optic nerve choristoma is described, with radiologic features mimicking those of an anterior cranial fossa neurenteric cyst. The case highlights the radiology-pathology correlates of choristomas and reviews the surgical approach and management of patients with such lesions.
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Affiliation(s)
- J C Benson
- From the Departments of Radiology (J.C.B., D.K.K., J.P., F.D., L.E., C.C.)
| | | | - S Cohen Cohen
- Neurosurgery (S.C.C., J.V.G.), Mayo Clinic, Rochester, Minnesota
| | - J Van Gompel
- Neurosurgery (S.C.C., J.V.G.), Mayo Clinic, Rochester, Minnesota
| | - D K Kim
- From the Departments of Radiology (J.C.B., D.K.K., J.P., F.D., L.E., C.C.)
| | - J Port
- From the Departments of Radiology (J.C.B., D.K.K., J.P., F.D., L.E., C.C.)
| | - F Diehn
- From the Departments of Radiology (J.C.B., D.K.K., J.P., F.D., L.E., C.C.)
| | - L Eckel
- From the Departments of Radiology (J.C.B., D.K.K., J.P., F.D., L.E., C.C.)
| | - C Carr
- From the Departments of Radiology (J.C.B., D.K.K., J.P., F.D., L.E., C.C.)
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22
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Khan MF, Ahmed F, Rehman S, Akhtar I, Rehman MA, Shinde PA, Khan K, Kim DK, Eom J, Lipsanen H, Sun Z. High performance complementary WS 2 devices with hybrid Gr/Ni contacts. Nanoscale 2020; 12:21280-21290. [PMID: 33063794 DOI: 10.1039/d0nr05737a] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Two-dimensional (2D) transition metal dichalcogenides have attracted vibrant interest for future solid-state device applications due to their unique properties. However, it is challenging to realize 2D material based high performance complementary devices due to the stubborn Fermi level pinning effect and the lack of facile doping techniques. In this paper, we reported a hybrid Gr/Ni contact to WS2, which can switch carrier types from n-type to p-type in WS2. The unorthodox polarity transition is attributed to the natural p-doping of graphene with Ni adsorption and the alleviation of Fermi level pinning in WS2. Furthermore, we realized asymmetric Ni and Gr/Ni hybrid contacts to a multilayer WS2 device, and we observed synergistic p-n diode characteristics with excellent current rectification exceeding 104, and a near unity ideality factor of 1.1 (1.6) at a temperature of 4.5 K (300 K). Lastly, our WS2 p-n device exhibits high performance photovoltaic ability with a maximum photoresponsivity of 4 × 104 A W-1 at 532 nm wavelength, that is 108 times higher than that of graphene and 50 times better than that of the monolayer MoS2 photodetector. This doping-free carrier type modulation technique will pave the way to realize high performance complementary electronics and optoelectronic devices based on 2D materials.
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Affiliation(s)
- Muhammad Farooq Khan
- Department of Electrical Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Korea.
| | - Faisal Ahmed
- Department of Electronics and Nanoengineering, Aalto University, P.O. Box 13500, FI-00076 Aalto, Finland and Department of Mechanical Engineering, College of Electrical and Mechanical Engineering, National University of Science and Technology, Islamabad 44000, Pakistan
| | - Shania Rehman
- Department of Electrical Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Korea.
| | - Imtisal Akhtar
- Department of Mechanical Engineering, Chung-Ang University, Seoul, South Korea
| | - Malik Abdul Rehman
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, South Korea
| | - Pragati A Shinde
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, South Korea
| | - Karim Khan
- School of Electrical Engineering & Intelligentization, Dongguan University of Technology (DGUT), Dongguan, 523808, Guangdong, China and Institute of Microscale Optoelectronics, Collaborative Innovation Centre for Optoelectronic Science & Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ), Shenzhen University, Shenzhen 518060, P.R. China
| | - Deok-Kee Kim
- Department of Electrical Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Korea.
| | - Jonghwa Eom
- Graphene Research Institute-Texas Photonics Center International Research Center (GRI-TPCIRC), Sejong University, Seoul 05006, Korea
| | - Harri Lipsanen
- Department of Electronics and Nanoengineering, Aalto University, P.O. Box 13500, FI-00076 Aalto, Finland
| | - Zhipei Sun
- Department of Electronics and Nanoengineering, Aalto University, P.O. Box 13500, FI-00076 Aalto, Finland and QTF Centre of Excellence, Department of Applied Physics, Aalto University, Aalto 00076, Finland
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23
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Kannan B, Campbell DL, Vasconcelos F, Winik R, Kim DK, Kjaergaard M, Krantz P, Melville A, Niedzielski BM, Yoder JL, Orlando TP, Gustavsson S, Oliver WD. Generating spatially entangled itinerant photons with waveguide quantum electrodynamics. Sci Adv 2020; 6:6/41/eabb8780. [PMID: 33028523 PMCID: PMC7541065 DOI: 10.1126/sciadv.abb8780] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 08/21/2020] [Indexed: 05/31/2023]
Abstract
Realizing a fully connected network of quantum processors requires the ability to distribute quantum entanglement. For distant processing nodes, this can be achieved by generating, routing, and capturing spatially entangled itinerant photons. In this work, we demonstrate the deterministic generation of such photons using superconducting transmon qubits that are directly coupled to a waveguide. In particular, we generate two-photon N00N states and show that the state and spatial entanglement of the emitted photons are tunable via the qubit frequencies. Using quadrature amplitude detection, we reconstruct the moments and correlations of the photonic modes and demonstrate state preparation fidelities of 84%. Our results provide a path toward realizing quantum communication and teleportation protocols using itinerant photons generated by quantum interference within a waveguide quantum electrodynamics architecture.
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Affiliation(s)
- B Kannan
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - D L Campbell
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - F Vasconcelos
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - R Winik
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - D K Kim
- MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA 02420, USA
| | - M Kjaergaard
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - P Krantz
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - A Melville
- MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA 02420, USA
| | - B M Niedzielski
- MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA 02420, USA
| | - J L Yoder
- MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA 02420, USA
| | - T P Orlando
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - S Gustavsson
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - W D Oliver
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA 02420, USA
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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24
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Hwang J, Ku Z, Jeon J, Kim Y, Kim JO, Kim DK, Urbas A, Kim EK, Lee SJ. Plasmonic-Layered InAs/InGaAs Quantum-Dots-in-a-Well Pixel Detector for Spectral-Shaping and Photocurrent Enhancement. Nanomaterials (Basel) 2020; 10:E1827. [PMID: 32933197 PMCID: PMC7559483 DOI: 10.3390/nano10091827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 09/02/2020] [Accepted: 09/10/2020] [Indexed: 11/25/2022]
Abstract
The algorithmic spectrometry as an alternative to traditional approaches has the potential to become the next generation of infrared (IR) spectral sensing technology, which is free of physical optical filters, and only a very small number of data are required from the IR detector. A key requirement is that the detector spectral responses must be engineered to create an optimal basis that efficiently synthesizes spectral information. Light manipulation through metal perforated with a two-dimensional square array of subwavelength holes provides remarkable opportunities to harness the detector response in a way that is incorporated into the detector. Instead of previous experimental efforts mainly focusing on the change over the resonance wavelength by tuning the geometrical parameters of the plasmonic layer, we experimentally and numerically demonstrate the capability for the control over the shape of bias-tunable response spectra using a fixed plasmonic structure as well as the detector sensitivity improvement, which is enabled by the anisotropic dielectric constants of the quantum dots-in-a-well (DWELL) absorber and the presence of electric field along the growth direction. Our work will pave the way for the development of an intelligent IR detector, which is capable of direct viewing of spectral information without utilizing any intervening the spectral filters.
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Affiliation(s)
- Jehwan Hwang
- Interdisciplinary Materials Measurement Institute, Korea Research Institute of Standards and Science, Daejeon 34113, Korea; (J.H.); (J.J.); (Y.K.)
- Department of Physics and Research Institute for Convergence of Basic Sciences, Hanyang University, Seoul 04763, Korea
| | - Zahyun Ku
- Materials and Manufacturing Directorate, Air Force Research Laboratory, WPAFB, OH 45433, USA; (Z.K.); (A.U.)
| | - Jiyeon Jeon
- Interdisciplinary Materials Measurement Institute, Korea Research Institute of Standards and Science, Daejeon 34113, Korea; (J.H.); (J.J.); (Y.K.)
- Department of Electronic Engineering, Sejong University, Seoul 05006, Korea;
| | - Yeongho Kim
- Interdisciplinary Materials Measurement Institute, Korea Research Institute of Standards and Science, Daejeon 34113, Korea; (J.H.); (J.J.); (Y.K.)
| | - Jun Oh Kim
- Advanced Instrumentation Institute, Korea Research Institute of Standards and Science, Daejeon 34113, Korea;
| | - Deok-Kee Kim
- Department of Electronic Engineering, Sejong University, Seoul 05006, Korea;
| | - Augustine Urbas
- Materials and Manufacturing Directorate, Air Force Research Laboratory, WPAFB, OH 45433, USA; (Z.K.); (A.U.)
| | - Eun Kyu Kim
- Department of Physics and Research Institute for Convergence of Basic Sciences, Hanyang University, Seoul 04763, Korea
| | - Sang Jun Lee
- Interdisciplinary Materials Measurement Institute, Korea Research Institute of Standards and Science, Daejeon 34113, Korea; (J.H.); (J.J.); (Y.K.)
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25
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Pope MC, Carr CM, Brinjikji W, Kim DK. Safety of Consecutive Bilateral Decubitus Digital Subtraction Myelography in Patients with Spontaneous Intracranial Hypotension and Occult CSF Leak. AJNR Am J Neuroradiol 2020; 41:1953-1957. [PMID: 32883671 DOI: 10.3174/ajnr.a6765] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 07/01/2020] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Digital subtraction myelography performed with the patient in the lateral decubitus position has the potential for increased sensitivity over prone-position myelography in the detection of spinal CSF-venous fistulas, a well-established cause of spontaneous intracranial hypotension. We report on the safety of performing routine, consecutive-day right and left lateral decubitus digital subtraction myelography in these patients. MATERIALS AND METHODS In this retrospective case series, all patients undergoing consecutive-day lateral decubitus digital subtraction myelography for suspected spinal CSF leak between September 2018 and September 2019 were identified. Chart review was performed to identify any immediate or delayed adverse effects associated with the procedures. Procedural parameters were also analyzed due to inherent variations associated with the positive-pressure myelography technique that was used. RESULTS A total of 60 patients underwent 68 pairs of consecutive-day lateral decubitus digital subtraction myelographic examinations during the study period. No major adverse effects were recorded. Various minor adverse effects were observed, including pain requiring analgesics (27.2%), nausea/vomiting requiring antiemetics (8.1%), and transient neurologic effects such as syncope, vertigo, altered mental status, and autonomic dysfunction (5.1%). Minor transient neurologic effects were correlated with increasing volumes of intrathecal saline injectate used for thecal sac prepressurization. CONCLUSIONS In patients with spontaneous intracranial hypotension and suspected spontaneous spinal CSF leak, consecutive-day lateral decubitus digital subtraction myelography demonstrates an acceptable risk profile without evidence of neurotoxic effects from cumulative intrathecal contrast doses. Higher intrathecal saline injectate volumes may correlate with an increased incidence of minor transient periprocedural neurologic effects.
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Affiliation(s)
- M C Pope
- Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - C M Carr
- Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - W Brinjikji
- Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - D K Kim
- Department of Radiology, Mayo Clinic, Rochester, Minnesota
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26
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Shlapak DP, Kim DK, Diehn FE, Benson JC, Lehman VT, Liebo GB, Morris JM, Morris PP, Verdoorn JT, Carr CM. Time to Resolution of Inadvertent Subdural Contrast Injection during a Myelogram: When Can the Study Be Reattempted? AJNR Am J Neuroradiol 2020; 41:1958-1962. [PMID: 32855185 DOI: 10.3174/ajnr.a6725] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 06/15/2020] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Inadvertent subdural contrast injections can occur during any myelogram. Currently, there are no guidelines defining when residual subdural iodinated contrast will be cleared and no longer interfere with subsequent procedure and imaging. We investigated the time to resolution of subdural contrast using a 2-day lateral decubitus digital subtraction myelogram and associated CT myelogram data in patients undergoing evaluation for spontaneous intracranial hypotension. MATERIALS AND METHODS Retrospective review of 63 patients with lateral decubitus digital subtraction myelograms from September 4, 2018, to October 1, 2019, was performed. Patients with 2-day lateral decubitus digital subtraction myelograms on 2 consecutive days, with or without a same-day CT myelogram on day 1 and with a same-day CT myelogram on day 2, were included. Patients with next-day CT covering at least the abdomen and pelvis after either-day injection were also included. In cases of subdural injection, next-day CT scans were evaluated for residual subdural contrast. RESULTS Of 49 included patients, 5 had subdural injection on day 1, with the second-day CT myelogram available for review. One of these 5 patients had subdural injections on 2 different days and subsequently had chest/abdomen/pelvis CTA a day after the second subdural injection. In all 6 cases of subdural injections, there was complete resolution of subdural contrast on the next-day CT, with the shortest time to resolution of approximately 20.5 hours (range, 20.5-28.5 hours). CONCLUSIONS Our study suggests that resolution of inadvertently injected subdural contrast occurs within 1 day, and the myelogram can be reattempted as early as the next day.
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Affiliation(s)
- D P Shlapak
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - D K Kim
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - F E Diehn
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - J C Benson
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - V T Lehman
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - G B Liebo
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - J M Morris
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - P P Morris
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - J T Verdoorn
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - C M Carr
- From the Department of Radiology, Mayo Clinic, Rochester, Minnesota
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27
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Benson JC, Vizcaino MA, Kim DK, Carr C, Rose P, Eckel L, Diehn F. Exophytic Lumbar Vertebral Body Mass in an Adult with Back Pain. AJNR Am J Neuroradiol 2020; 41:1786-1790. [PMID: 32819895 DOI: 10.3174/ajnr.a6749] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 06/02/2020] [Indexed: 12/18/2022]
Abstract
Chordomas are rare primary bone malignancies derived from notochord remnants. The tumors often are slow-growing and often present with indolent, nonspecific symptoms. Nevertheless, chordomas are locally aggressive and highly prone to local recurrence, necessitating precise planning before biopsy and/or surgical resection. Familiarity with the imaging features of chordomas is, therefore, essential. This case highlights the typical imaging and pathologic features of a spinal chordoma as well as the surgical approach and the patient's subsequent outcome.
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Affiliation(s)
- J C Benson
- From the Departments of Radiology (J.C.B., D.K.K., C.C., L.E., F.D.)
| | | | - D K Kim
- From the Departments of Radiology (J.C.B., D.K.K., C.C., L.E., F.D.)
| | - C Carr
- From the Departments of Radiology (J.C.B., D.K.K., C.C., L.E., F.D.)
| | - P Rose
- Orthopedic Surgery (P.R.), Mayo Clinic, Rochester, Minnesota
| | - L Eckel
- From the Departments of Radiology (J.C.B., D.K.K., C.C., L.E., F.D.)
| | - F Diehn
- From the Departments of Radiology (J.C.B., D.K.K., C.C., L.E., F.D.)
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28
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Bond KM, Benson JC, Cutsforth-Gregory JK, Kim DK, Diehn FE, Carr CM. Spontaneous Intracranial Hypotension: Atypical Radiologic Appearances, Imaging Mimickers, and Clinical Look-Alikes. AJNR Am J Neuroradiol 2020; 41:1339-1347. [PMID: 32646948 DOI: 10.3174/ajnr.a6637] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 04/30/2020] [Indexed: 12/19/2022]
Abstract
Spontaneous intracranial hypotension is a condition characterized by low CSF volume secondary to leakage through a dural defect with no identifiable cause. Patients classically present with orthostatic headaches, but this symptom is not specific to spontaneous intracranial hypotension, and initial misdiagnosis is common. The most prominent features of spontaneous intracranial hypotension on intracranial MR imaging include "brain sag" and diffuse pachymeningeal enhancement, but these characteristics can be seen in several other conditions. Understanding the clinical and imaging features of spontaneous intracranial hypotension and its mimickers will lead to more prompt and accurate diagnoses. Here we discuss conditions that mimic the radiologic and clinical presentation of spontaneous intracranial hypotension as well as other disorders that CSF leaks can imitate.
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Affiliation(s)
- K M Bond
- From the Mayo Clinic School of Medicine (K.M.B.), Rochester, Minnesota
| | - J C Benson
- Departments of Radiology (J.C.B., D.K.K., F.E.D., C.M.C.)
| | | | - D K Kim
- Departments of Radiology (J.C.B., D.K.K., F.E.D., C.M.C.)
| | - F E Diehn
- Departments of Radiology (J.C.B., D.K.K., F.E.D., C.M.C.)
| | - C M Carr
- Departments of Radiology (J.C.B., D.K.K., F.E.D., C.M.C.)
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Canepa J, Torgerson J, Kim DK, Lindahl E, Takahashi R, Whitelock K, Heying M, Wilkinson SP. Characterizing osmolyte chemical class hierarchies and functional group requirements for thermal stabilization of proteins. Biophys Chem 2020; 264:106410. [PMID: 32574923 DOI: 10.1016/j.bpc.2020.106410] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 05/25/2020] [Accepted: 05/31/2020] [Indexed: 12/20/2022]
Abstract
Osmolytes are naturally occurring organic compounds that protect cellular proteins and other macromolecules against various forms of stress including temperature extremes. While biological studies have correlated the accumulation of certain classes of osmolytes with specific forms of stress, including thermal stress, it remains unclear whether or not these observations reflect an intrinsic chemical class hierarchy amongst the osmolytes with respect to effects on protein stability. In addition, very little is known in regards to the molecular elements of the osmolytes themselves that are essential for their functions. In this study, we use differential scanning fluorimetry to quantify the thermal stabilizing effects of members from each of the three main classes of protecting osmolytes on two model protein systems, C-reactive protein and tumor necrosis factor alpha. Our data reveals the absence of a strict chemical class hierarchy amongst the osmolytes with respect to protein thermal stabilization, and indicates differential responses of these proteins to certain osmolytes. In the second part of this investigation we dissected the molecular elements of amino acid osmolytes required for thermal stabilization of myoglobin and C-reactive protein. We show that the complete amino acid zwitterion is required for thermal stabilization of myoglobin, whereas removal of the osmolyte amino group does not diminish stabilizing effects on C-reactive protein. These disparate responses of proteins to osmolytes and other small molecules are consistent with previous observations that osmolyte effects on protein stability are protein-specific. Moreover, the data reported in this study support the view that osmolyte effects cannot be fully explained by considering only the solvent accessibility of the polypeptide backbone in the native and denatured states, and corroborate the need for more complex models that take into account the entire protein fabric.
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Affiliation(s)
- J Canepa
- Department of Chemistry & Biochemistry, California Polytechnic State University, San Luis Obispo, CA, USA
| | - J Torgerson
- Department of Chemistry & Biochemistry, California Polytechnic State University, San Luis Obispo, CA, USA
| | - D K Kim
- Department of Chemistry & Biochemistry, California Polytechnic State University, San Luis Obispo, CA, USA
| | - E Lindahl
- Department of Chemistry & Biochemistry, California Polytechnic State University, San Luis Obispo, CA, USA
| | - R Takahashi
- Department of Chemistry & Biochemistry, California Polytechnic State University, San Luis Obispo, CA, USA
| | - K Whitelock
- Department of Chemistry & Biochemistry, California Polytechnic State University, San Luis Obispo, CA, USA
| | - M Heying
- Department of Chemistry & Biochemistry, California Polytechnic State University, San Luis Obispo, CA, USA
| | - S P Wilkinson
- Department of Chemistry & Biochemistry, California Polytechnic State University, San Luis Obispo, CA, USA.
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Khan MF, Rehman S, Rehman MA, Basit MA, Kim DK, Ahmed F, Khalil HMW, Akhtar I, Jun SC. Modulation of Magnetoresistance Polarity in BLG/SL-MoSe 2 Heterostacks. Nanoscale Res Lett 2020; 15:136. [PMID: 32572648 PMCID: PMC7310050 DOI: 10.1186/s11671-020-03365-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Accepted: 06/07/2020] [Indexed: 06/01/2023]
Abstract
Two-dimensional (2D) layered materials have an atomically thin and flat nature which makes it an ultimate candidate for spintronic devices. The spin-valve junctions (SVJs), composed of 2D materials, have been recognized as unique features of spin transport polarization. However, the magnetotransport properties of SVJs are highly influenced by the type of intervening layer (spacer) inserted between the ferromagnetic materials (FMs). In this situation, the spin filtering effect at the interfaces plays a critical role in the observation of the magnetoresistance (MR) of such magnetic structures, which can be improved by using promising hybrid structure. Here, we report MR of bilayer graphene (BLG), single-layer MoSe2 (SL-MoSe2), and BLG/SL-MoSe2 heterostack SVJs. However, before annealing, BLG and SL-MoSe2 SVJs demonstrate positive MR, but after annealing, BLG reverses its polarity while the SL-MoSe2 maintains its polarity and demonstrated stable positive spin polarizations at both interfaces due to meager doping effect of ferromagnetic (FM) contacts. Further, Co/BLG/SL-MoSe2/NiFe determines positive MR, i.e., ~ 1.71% and ~ 1.86% at T = 4 K before and after annealing, respectively. On the contrary, NiFe/BLG/SL-MoSe2/Co SVJs showed positive MR before annealing and subsequently reversed its MR sign after annealing due to the proximity-induced effect of metals doping with graphene. The obtained results can be useful to comprehend the origin of polarity and the selection of non-magnetic material (spacer) for magnetotransport properties. Thus, this study established a new paragon for novel spintronic applications.
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Affiliation(s)
- Muhammad Farooq Khan
- Department of Electrical Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul, 05006, South Korea
| | - Shania Rehman
- Department of Electrical Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul, 05006, South Korea
| | - Malik Abdul Rehman
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - Muhammad Abdul Basit
- Department of Materials Science and Engineering, Institute of Space Technology, Islamabad, 44000, Pakistan
| | - Deok-Kee Kim
- Department of Electrical Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul, 05006, South Korea
| | - Faisal Ahmed
- Department of Mechanical Engineering, NUST College of Electrical and Mechanical Engineering, National University of Science and Technology, Islamabad, 44000, Pakistan
- Department of Electronics and Nanoengineering, Aalto University, P.O. Box 13500, F1-00076, Aalto, Finland
| | - H M Waseem Khalil
- Department of Electrical Engineering, College of Engineering and Technology, University of Sargodha, Sargodha, Pakistan
| | - Imtisal Akhtar
- Department of Mechanical Engineering, Chung-Ang University, Seoul, South Korea
| | - Seong Chan Jun
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea.
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Yun JK, Chong BK, Kim HJ, Lee IS, Gong CS, Kim BS, Lee GD, Choi S, Kim HR, Kim DK, Park SI, Kim YH. Comparative outcomes of robot-assisted minimally invasive versus open esophagectomy in patients with esophageal squamous cell carcinoma: a propensity score-weighted analysis. Dis Esophagus 2020; 33:5610078. [PMID: 31665266 DOI: 10.1093/dote/doz071] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 06/16/2019] [Indexed: 02/06/2023]
Abstract
Robots are increasingly used in minimally invasive surgery. We evaluated the clinical benefits of robot-assisted minimally invasive esophagectomy (RAMIE) in comparison with the conventional open esophageal surgery. From 2012 to 2016, 371 patients with esophageal squamous cell carcinoma underwent an Ivor Lewis or McKeown procedure at our institution. Of these, 130 patients underwent laparoscopic gastric conduit formation followed by RAMIE, whereas 241 patients underwent conventional esophageal surgery, including laparotomy and open esophagectomy (OE). We compared the short- and long-term clinical outcomes of these patients using the propensity score-based inverse probability of treatment weighting technique (IPTW). Among the early outcomes, the OE group showed a higher incidence of pneumonia (P = 0.035) and a higher requirement for vasopressors (P = 0.001). Regarding the long-term outcomes, all-cause mortality was significantly higher (P = 0.001) and disease-free survival was lower (P = 0.006) in the OE group. Wound-related problems also occurred more frequently in the OE group (P = 0.020) during the long-term follow-up. There was no statistical intergroup difference in the recurrence rates (P = 0.191). The Cox proportional-hazard analysis demonstrated that wound problems (HR 0.16, 95% CI 0.02-0.57; P = 0.017), pneumonia (HR 0.23, 95% CI 0.06-0.68; P = 0.019), and use of vasopressors (HR 0.14, 95% CI 0.08-0.25; P = 0.001) were independent predictors of mortality. RAMIE could be a better surgical option for selected patients with esophageal squamous cell carcinoma.
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Affiliation(s)
- J K Yun
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - B K Chong
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - H J Kim
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - I-S Lee
- Division of Stomach Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - C-S Gong
- Division of Stomach Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - B S Kim
- Division of Stomach Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - G D Lee
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - S Choi
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - H R Kim
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - D K Kim
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - S-I Park
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Y-H Kim
- Division of Thoracic Surgery, Department of Thoracic & Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
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Kim DK, Brinjikji W, Morris PP, Diehn FE, Lehman VT, Liebo GB, Morris JM, Verdoorn JT, Cutsforth-Gregory JK, Farb RI, Benson JC, Carr CM. Lateral Decubitus Digital Subtraction Myelography: Tips, Tricks, and Pitfalls. AJNR Am J Neuroradiol 2019; 41:21-28. [PMID: 31857327 DOI: 10.3174/ajnr.a6368] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 10/29/2019] [Indexed: 11/07/2022]
Abstract
Digital subtraction myelography is a valuable diagnostic technique to detect the exact location of CSF leaks in the spine to facilitate appropriate diagnosis and treatment of spontaneous spinal CSF leaks. Digital subtraction myelography is an excellent diagnostic tool for assessment of various types of CSF leaks, and lateral decubitus digital subtraction myelography is increasingly being used to diagnose CSF-venous fistulas. Lateral decubitus digital subtraction myelography differs from typical CT and fluoroscopy-guided myelograms in many ways, including equipment, supplies, and injection and image-acquisition techniques. Operators should be familiar with techniques, common pitfalls, and artifacts to improve diagnostic yield and prevent nondiagnostic examinations.
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Affiliation(s)
- D K Kim
- From the Departments of Radiology (D.K.K., W.B., P.P.M., F.E.D., V.T.L., G.B.L., J.M.M., J.T.V., J.C.B., C.M.C.)
| | - W Brinjikji
- From the Departments of Radiology (D.K.K., W.B., P.P.M., F.E.D., V.T.L., G.B.L., J.M.M., J.T.V., J.C.B., C.M.C.)
| | - P P Morris
- From the Departments of Radiology (D.K.K., W.B., P.P.M., F.E.D., V.T.L., G.B.L., J.M.M., J.T.V., J.C.B., C.M.C.)
| | - F E Diehn
- From the Departments of Radiology (D.K.K., W.B., P.P.M., F.E.D., V.T.L., G.B.L., J.M.M., J.T.V., J.C.B., C.M.C.)
| | - V T Lehman
- From the Departments of Radiology (D.K.K., W.B., P.P.M., F.E.D., V.T.L., G.B.L., J.M.M., J.T.V., J.C.B., C.M.C.)
| | - G B Liebo
- From the Departments of Radiology (D.K.K., W.B., P.P.M., F.E.D., V.T.L., G.B.L., J.M.M., J.T.V., J.C.B., C.M.C.)
| | - J M Morris
- From the Departments of Radiology (D.K.K., W.B., P.P.M., F.E.D., V.T.L., G.B.L., J.M.M., J.T.V., J.C.B., C.M.C.)
| | - J T Verdoorn
- From the Departments of Radiology (D.K.K., W.B., P.P.M., F.E.D., V.T.L., G.B.L., J.M.M., J.T.V., J.C.B., C.M.C.)
| | | | - R I Farb
- Department of Medical Imaging (R.I.F.), Division of Neuroradiology, Toronto Western Hospital, Toronto, Ontario, Canada
| | - J C Benson
- From the Departments of Radiology (D.K.K., W.B., P.P.M., F.E.D., V.T.L., G.B.L., J.M.M., J.T.V., J.C.B., C.M.C.)
| | - C M Carr
- From the Departments of Radiology (D.K.K., W.B., P.P.M., F.E.D., V.T.L., G.B.L., J.M.M., J.T.V., J.C.B., C.M.C.)
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Rehman S, Kim H, Farooq Khan M, Hur JH, Lee AD, Kim DK. Tuning of ionic mobility to improve the resistive switching behavior of Zn-doped CeO 2. Sci Rep 2019; 9:19387. [PMID: 31852939 PMCID: PMC6920484 DOI: 10.1038/s41598-019-55716-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 12/02/2019] [Indexed: 11/08/2022] Open
Abstract
Correlation between the resistive switching characteristics of Au/Zn-doped CeO2/Au devices and ionic mobility of CeO2 altered by the dopant concentration were explored. It was found that the ionic mobility of CeO2 has a profound effect on the operating voltages of the devices. The magnitude of operating voltage was observed to decrease when the doping concentration of Zn was increased up to 14%. After further increasing the doping level to 24%, the device hardly exhibits any resistive switching. At a low doping concentration, only isolated Vo existed in the CeO2 lattice. At an intermediate doping concentration, the association between dopant and Vo formed (Zn, Vo)× defect clusters. Low number density of these defect clusters initially favored the formation of Vo filament and led to a reduction in operating voltage. As the size and number density of (Zn, Vo)× defect clusters increased at a higher doping concentration, the ionic conductivity was limited with the trapping of isolated Vo by these defect clusters, which resulted in the diminishing of resistive switching. This research work provides a strategy for tuning the mobility of Vo to modulate resistive switching characteristics for non-volatile memory applications.
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Affiliation(s)
- Shania Rehman
- Department of Electrical Engineering, Sejong University, Seoul, 05006, Republic of Korea
| | - Honggyun Kim
- Department of Electrical Engineering, Sejong University, Seoul, 05006, Republic of Korea
| | - Muhammad Farooq Khan
- Department of Electrical Engineering, Sejong University, Seoul, 05006, Republic of Korea
| | - Ji-Hyun Hur
- Department of Electrical Engineering, Sejong University, Seoul, 05006, Republic of Korea
| | - Anthony D Lee
- Department of Mechanical Engineering Technology, Farmingdale State College, Farmingdale, New York, 11735, USA
| | - Deok-Kee Kim
- Department of Electrical Engineering, Sejong University, Seoul, 05006, Republic of Korea.
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Kim KY, Yoon SH, Kim IK, Kim HG, Kim DK, Shim EL, Choi YJ. Flexible narrowband organic photodiode with high selectivity in color detection. Nanotechnology 2019; 30:435203. [PMID: 31349232 DOI: 10.1088/1361-6528/ab35ff] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This study describes the design of a flexible narrowband organic photodiode (OPDs) with a novel structure. A bulk heterojunction of poly(3-hexylthiophene-2,5-diyl) (P3HT) and [6,6]-phenyl-C70-butyric acid methyl ester (PC70BM) is introduced as a photoactive layer, with an optimized thickness of 160 nm, and a MoO3/Ag/MoO3 (MAM) multilayer electrode and polyimide (PI) film substrate were used. The OPD with the device architecture of PI/MAM/P3HT:PC70BM/Al showed narrowband photodiode performance in the 500-650 nm wavelength range. The maximum external quantum efficiency (EQE) of the OPD was 15.41% at 570 nm, which dropped to ∼0% outside the operation wavelength range. This narrowband detectivity originated from the cutoff of light at wavelengths below 500 nm by the PI substrate and photoreactivity of P3HT:PC70BM at wavelengths between 300 and 650 nm. Outer bending tests performed over 1000 cycles revealed that the average maximum EQE remained at ∼15%. The maximum responsivity of the OPD was calculated to be 0.07 A W-1 at 570 nm. The OPD device showed a narrow response spectrum with a full width at half maximum of 100 nm. This research suggests a new approach for the fabrication of flexible OPDs with high selectivity in color detection.
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Affiliation(s)
- Kyu Young Kim
- Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul, 05006, Republic of Korea
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Sung J, Ahn KT, Cho BR, Lee SY, Kim BJ, Kim DK, Park JI, Lee WS. 1423Adherence to triple component antihypertensive regimen is higher in single-pill combination than two-pill regimen: data from a randomized controlled trial using medication event monitoring system. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Simplicity of regimen is known to be an important determinant of medication adherence and using single-pill combination (SPC) in hypertension treatment resulted in better adherence and persistence than free-equivalent combination. However, this finding has been studied only in dual-component antihypertensive treatments and in observational studies using medication possession ratio as an index of adherence. Medication event monitoring system (MEMS) is considered to be the gold standard in estimating medication adherence.
Purpose
To investigate the superiority in adherence of triple-component SPC compared to equivalent two-pill regimen using MEMS
Methods
This is a multi-center open-label randomized controlled trial. Inclusion criteria were hypertensive patients whose clinic blood pressure is not adequately controlled (systolic >140 mmHg or diastolic >90 mmHg) with combination antihypertensive regimen comprising two of three classes (angiotensin receptor blocker, calcium channel blocker and thiazide diuretics) for at least 4 weeks. Eligible patients were randomized either to single-pill (triple-component SPC, olmesartan/amlodipine/ hydrochlorothiazide 20/5/12.5 mg) or two-pill (dual-component SPC + one free pill, olmesartan/hydrochlorothiazide 20/12.5 mg + amlodipine 5 mg) groups and maintained for 12 weeks. Medications were dispensed in MEMS. Primary outcomes were the difference of percentage of dose taken (PDT) and percentage of days with prescribed dose taken correctly (PDTc) between single- and two-pill therapy, calculated from MEMS data.
Results
From 8 hospitals, 146 hypertensive patients were randomized into single- and two-pill groups. Final analysis was done in 65 and 66 patients in each group from which adherence index could be obtained. Baseline clinical characteristics of the two groups were not different. The single-pill group had significantly higher PDT and PDTc compared to the two-pill group. (median (25–75 percentile) (%), PDT 95.1 (87.9 - 100.0) vs 91.2 (79.8 - 96.5); PDTc 93.1 (79.8 - 96.5) vs 91.3 (70.7 - 96.4), p = both 0.04, by Wilcoxon rank sum test)
Percent dose taken
Conclusion
Single-pill combination of triple-component antihypertensive regimen showed superior adherence compared to equivalent two-pill therapy. Reducing pill burden by using SPC is a relevant strategy to enhance the adherence to multi-drug antihypertensive therapy.
Acknowledgement/Funding
Daiichi-Sankyo
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Affiliation(s)
- J Sung
- Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea (Republic of)
| | - K T Ahn
- Chungnam National University Hospital, Daejeon, Korea (Republic of)
| | - B R Cho
- Kangwon National University Hospital, Chooncheon, Korea (Republic of)
| | - S Y Lee
- Ilsan Paik Hospital, Goyang, Korea (Republic of)
| | - B J Kim
- Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea (Republic of)
| | - D K Kim
- Busan Paik Hospital, Busan, Korea (Republic of)
| | - J I Park
- VHS Medical Center, Seoul, Korea (Republic of)
| | - W S Lee
- Chung-Ang University Hospital, Seoul, Korea (Republic of)
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Kim KE, Song WJ, Kim DK. Reevaluation of the earlobe types in Koreans. Homo 2018; 69:377-380. [PMID: 30392739 DOI: 10.1016/j.jchb.2018.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 10/25/2018] [Indexed: 10/28/2022]
Abstract
The shape of the earlobes has a variety of genetic significance. This study analyzed the frequencies of the earlobe shapes in the Korean population. Data were collected on randomly selected 500 males and 500 females in Daegu Metropolitan City, with all participant ages being in their twenties. Obtuse angled earlobes accounted for 41.2% of the earlobes observed, while acute angled earlobes prevalence was calculated at 38.8% and right angled earlobe was 20.0% of the total (sexes combined). In men, the acute angled earlobe was the most frequent type (43.0%), while the obtuse angled earlobe was the most frequent type in females (45.2%). These differences were statistically significant (p = 0.015). Overall, attached type earlobe (61.2%) was more frequent than free type earlobe. The attached type earlobe was more common in both sex groups (57.0% in male and 65.4% in female), and the proportion was significantly higher for females (p = 0.006). In conclusion, the findings in this study suggest that the attached earlobe type is the most common among Koreans, and the proportion of earlobe types among males and females is significantly different. Further studies are needed to understand the genetic background of earlobe types among Koreans.
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Affiliation(s)
- K E Kim
- Department of Medical Genetics, Keimyung University School of Medicine, 1095, Dalgubeoldaero, Dalseo-Gu, Daegu 42601, Republic of Korea
| | - W J Song
- Department of Medical Genetics, Keimyung University School of Medicine, 1095, Dalgubeoldaero, Dalseo-Gu, Daegu 42601, Republic of Korea
| | - D K Kim
- Department of Medical Genetics, Keimyung University School of Medicine, 1095, Dalgubeoldaero, Dalseo-Gu, Daegu 42601, Republic of Korea.
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Choi KK, Lee JY, Lee WB, Kim DK, Park CG. Chemical Vapor Deposition Carbon Film as a Capping Layer in 4H-SiC Based MOSFETs. J Nanosci Nanotechnol 2018; 18:5868-5875. [PMID: 29677708 DOI: 10.1166/jnn.2018.15573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Radio-frequency plasma enhanced CVD (RF-PECVD) carbon films were grown directly on 4-inch 4H-SiC substrates as a capping layer for MOSFET device applications. An approximately 50-nm-thick CVD carbon capping layer was found to reduce the surface roughness, as determined by atomic force microscopy (AFM). The secondary ion mass spectroscopy (SIMS) depth profile results revealed that carbon capping layer can suppress the dopant out-diffusion on the implanted surface after annealing even at high temperature (1700 °C) for 30 min. The calculated subthreshold swing (S) values of devices with CVD carbon capping layer and photo-resist process (base) measured at room temperature were 460 ± 50 (mV/dec) and 770 ± 70 (mV/dec), respectively. The lower value of 'S' for the device with carbon capping layer was related to the very low density of interface traps at the SiC-SiO2 interface. These results show the potential of CVD carbon as a capping layer for SiC MOSFET device applications.
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Affiliation(s)
- Kyeong-Keun Choi
- National Institute for Nanomaterials Technology (NINT), Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Jeong-Yoon Lee
- National Institute for Nanomaterials Technology (NINT), Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Won-Beom Lee
- National Institute for Nanomaterials Technology (NINT), Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Deok-Kee Kim
- Department of Electrical Engineering, Sejong University, Seoul 143-747, Republic of Korea
| | - Chan-Gyung Park
- National Institute for Nanomaterials Technology (NINT), Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
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Hur JH, Kim DK. Theoretical investigation of performance of armchair graphene nanoribbon field effect transistors. Nanotechnology 2018; 29:185202. [PMID: 29457778 DOI: 10.1088/1361-6528/aab080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this paper, we theoretically investigate the highest possible expected performance for graphene nanoribbon field effect transistors (GNRFETs) for a wide range of operation voltages and device structure parameters, such as the width of the graphene nanoribbon and gate length. We formulated a self-consistent, non-equilibrium Green's function method in conjunction with the Poisson equation and modeled the operation of nanometer sized GNRFETs, of which GNR channels have finite bandgaps so that the GNRFET can operate as a switch. We propose a metric for competing with the current silicon CMOS high performance or low power devices and explain that this can vary greatly depending on the GNRFET structure parameters.
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Affiliation(s)
- Ji-Hyun Hur
- Electrical Engineering, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul, 143-747, Republic of Korea
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Lee HP, Chong BK, Lee KH, Bok JS, Choi SH, Kim HR, Kim Y, Park SI, Kim DK. P-205CLINICAL OUTCOMES OF DOUBLE METASTASIS IN LUNG AND LIVER FROM COLORECTAL CANCER. Interact Cardiovasc Thorac Surg 2017. [DOI: 10.1093/icvts/ivx280.205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lee SH, Dong X, Lillehoj HS, Lamont SJ, Suo X, Kim DK, Lee KW, Hong YH. Comparing the immune responses of two genetically B-complex disparate Fayoumi chicken lines to Eimeria tenella. Br Poult Sci 2017; 57:165-71. [PMID: 26942865 DOI: 10.1080/00071668.2016.1141172] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The present study was conducted to compare the susceptibility of congenic Fayoumi lines to Eimeria tenella infection and to assess genetic differences in Eimeria egression. Chickens were orally inoculated with 5 × 10(4) sporulated E. tenella oocysts and challenged with 5 × 10(6) oocysts on the 10th day after the primary infection. The Fayoumi M5.1 line exhibited higher levels of body weight gain, less oocyst shedding and higher percentages of B and CD4(+)/CD8(+) T cells than the M15.2 chickens. These results demonstrate that M5.1 line is more resistant to E. tenella infection than M15.2 line. Furthermore, the percentage of sporozoite egress from peripheral blood mononuclear cells (PBMCs) was higher in the M5.1 line. The results of this study suggest that enhanced resistance of Fayoumi M5.1 to E. tenella infection may involve heightened cell-mediated and adaptive immunity, resulting in reduced intracellular development of Eimeria parasites.
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Affiliation(s)
- S-H Lee
- a United States Department of Agriculture , Animal Bioscience and Biotechnology Laboratory, Beltsville Agricultural Research Center , Beltsville , MD , USA.,b National Academy of Agricultural Science , Rural Development Administration , Jeollabuk-do , Republic of Korea
| | - X Dong
- a United States Department of Agriculture , Animal Bioscience and Biotechnology Laboratory, Beltsville Agricultural Research Center , Beltsville , MD , USA.,c National Animal Protozoa Laboratory & College of Veterinary Medicine , China Agricultural University , Beijing , China
| | - H S Lillehoj
- a United States Department of Agriculture , Animal Bioscience and Biotechnology Laboratory, Beltsville Agricultural Research Center , Beltsville , MD , USA
| | - S J Lamont
- d Department of Animal Science , Iowa State University , Ames , IA , USA
| | - X Suo
- d Department of Animal Science , Iowa State University , Ames , IA , USA
| | - D K Kim
- e C&K Genomics Inc ., Seoul , Republic of Korea
| | - K-W Lee
- f Department of Animal Science and Technology , Konkuk University , Seoul , Republic of Korea
| | - Y H Hong
- g Department of Animal Science and Technology , Chung-Ang University , Anseong , Republic of Korea
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Yoo SK, Kim DK, Jung SM, Kim EK, Lim JS, Kim JH. Performance of a Web-based, realtime, tele-ultrasound consultation system over high-speed commercial telecommunication lines. J Telemed Telecare 2016; 10:175-9. [PMID: 15165445 DOI: 10.1258/135763304323070841] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A Web-based, realtime, tele-ultrasound consultation system was designed. The system employed ActiveX control, MPEG-4 coding of full-resolution ultrasound video (640 × 480 pixels at 30 frames/s) and H.320 videoconferencing. It could be used via a Web browser. The system was evaluated over three types of commercial line: a cable connection, ADSL and VDSL. Three radiologists assessed the quality of compressed and uncompressed ultrasound video-sequences from 16 cases (10 abnormal livers, four abnormal kidneys and two abnormal gallbladders). The radiologists' scores showed that, at a given frame rate, increasing the bit rate was associated with increasing quality; however, at a certain threshold bit rate the quality did not increase significantly. The peak signal to noise ratio (PSNR) was also measured between the compressed and uncompressed images. In most cases, the PSNR increased as the bit rate increased, and increased as the number of dropped frames increased. There was a threshold bit rate, at a given frame rate, at which the PSNR did not improve significantly. Taking into account both sets of threshold values, a bit rate of more than 0.6 Mbit/s, at 30 frames/s, is suggested as the threshold for the maintenance of diagnostic image quality.
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Affiliation(s)
- Sun K Yoo
- Department of Medical Engineering, College of Medicine, Center for Emergency Medical Informatics, Yonsei University, Seoul, Korea.
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Lee JK, Lee J, Park SS, Heo EY, Park YS, Lee CH, Lee SM, Yoon HI, Yim JJ, Yoo CG, Chung HS, Kim YW, Han SK, Kim DK. Effect of inhalers on the development of haemoptysis in patients with non-cystic fibrosis bronchiectasis. Int J Tuberc Lung Dis 2015; 18:363-70. [PMID: 24670577 DOI: 10.5588/ijtld.13.0255] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The association of inhaler use with haemoptysis has rarely been reported in patients with non-cystic fibrosis (CF) bronchiectasis. OBJECTIVE To elucidate the effect of inhaler use on the development of haemoptysis in patients with non-CF bronchiectasis. METHODS In a case-crossover study of 192 non-CF bronchiectasis patients with a history of haemoptysis and inhaler use, the risk of haemoptysis associated with the use of inhalers was elucidated. Two inhaled corticosteroids/long-acting β₂-agonists (ICS/LABA), one long-acting muscarinic antagonist and one short-acting β₂-agonist (SABA) were evaluated. The case and control periods were defined respectively as 030 and 180210 days before haemoptysis. RESULTS The risk of haemoptysis during the case period was 3.51 times higher than during the control period with any use of inhalers (95%CI 1.966.28). The results of clinically significant haemoptysis showed good agreement with those of total events. These associations were consistent with the sensitivity analyses. In the sub-analysis according to inhaler type, ICS/LABA and SABA were significantly associated with an increased risk of haemoptysis (aOR 2.62, 95%CI 1.255.45; aOR 2.51, 95%CI 2.235.15). CONCLUSIONS In patients with non-CF bronchiectasis, the use of inhalers, especially including 2-agonist, was associated with an increased risk of haemoptysis.
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Affiliation(s)
- J-K Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - J Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - S S Park
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Republic of Korea
| | - E Y Heo
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Republic of Korea
| | - Y S Park
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - C H Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - S-M Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - H I Yoon
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam-si, Republic of Korea
| | - J-J Yim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - C-G Yoo
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - H S Chung
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Republic of Korea
| | - Y W Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - S K Han
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - D K Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Republic of Korea
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Lee HN, Lee KS, Kim JC, Chung BH, Kim CS, Lee JG, Kim DK, Park CH, Park JK, Hong SJ. Rate and associated factors of solifenacin add-on after tamsulosin monotherapy in men with voiding and storage lower urinary tract symptoms. Int J Clin Pract 2015; 69:444-53. [PMID: 25363606 DOI: 10.1111/ijcp.12581] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 09/29/2014] [Indexed: 11/27/2022] Open
Abstract
AIM To explore the rate of add-on therapy with solifenacin in men with voiding and storage lower urinary tract symptoms (LUTS) after tamsulosin monotherapy and to explore predictive factors for starting solifenacin add-on therapy. METHODS Men aged ≥ 45 years with IPSS ≥ 12 and symptoms of OAB (OAB-V8 ≥ 8, micturition ≥ 8/24 h, urgency ≥ 2/24 h) were enrolled to receive tamsulosin 0.2 mg once daily. After 4 weeks, men with residual symptoms of OAB and reported 'dissatisfied' or 'a little satisfied' were received solifenacin 5 mg in combination with tamsulosin monotherapy. Subjects completed an IPSS, a Quality of life (QoL) index, OAB V8, and an International Consultation of Incontinence Questionnaire (ICIQ)-Male LUTS, and patient perception of bladder condition (PPBC) at baseline and week 4. RESULTS Of a total of 305 patients, 254 patients completed 4 weeks of tamsulosin treatment. For 176 patients, solifenacin was added (69.3%). Significant predictive factors of solifenacin add-on therapy included long LUTS duration, high IPSS, number of micturitions per 24 h, more urgency episodes, high urgency severity score in a voiding diary and high OAB V8 score. Based on multivariable analysis, potential predictive factors of solifenacin add-on therapy included long LUTS duration (OR = 1.008, 95% CI: 1.001-1.014), high serum PSA (OR = 1.543, 95% CI: 1.136-2.095) and small prostate size (OR = 0.970, 95% CI: 0.947-0.994) (p < 0.05). IPSS, daytime micturitions and urgency episodes, OAB V8 scores, ICIQ and PPBC were improved after tamsulosin monotherapy. CONCLUSIONS Two thirds of men with voiding and storage LUTS needed to add anticholinergics after 4 weeks of tamsulosin monotherapy. Patients with longer lasting symptoms and storage symptoms with small prostate volume may require the anticholinergic add-on.
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Affiliation(s)
- H N Lee
- Department of Urology, Seoul Seonam Hospital, Ewha Womans University, Seoul, Korea
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Lee YS, Lee KS, Kim JC, Hong S, Chung BH, Kim CS, Lee JG, Kim DK, Park CH, Park JK. Persistence with solifenacin add-on therapy in men with benign prostate obstruction and residual symptoms of overactive bladder after tamsulosin monotherapy. Int J Clin Pract 2014; 68:1496-502. [PMID: 25284747 DOI: 10.1111/ijcp.12483] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
AIMS In spite of the reported efficacy and safety of antimuscarinics in men with OAB (overactive bladder) and BPO (benign prostatic obstruction), many patients do not persist with the treatment. We aimed to evaluate persistence and the reasons for the discontinuation of solifenacin add-on therapy in men with residual symptoms of OAB after tamsulosin monotherapy for BPO in a real clinical environment. METHODS Men aged ≥ 45 years with IPSS ≥ 12 and symptoms of OAB (OAB-V8 ≥ 8, micturition ≥ 8/24 h, urgency ≥ 2/24 h) were prescribed tamsulosin 0.2 mg. After 4 weeks, men who had residual symptoms of OAB (OAB-V8 ≥ 8, micturition ≥ 8/24 h, urgency ≥ 1/24 h) and reported that they were 'dissatisfied' or 'a little satisfied' with the therapy were enrolled and prescribed solifenacin 5 mg in combination with tamsulosin. After 52 weeks, persistence and the reasons for the discontinuation of solifenacin were evaluated. Factors related to persistence were analysed. RESULTS Of the 305 men who had been treated with tamsulosin, 176 were prescribed solifenacin. After 52 weeks, 44 (25%) remained on solifenacin therapy. Of the 132 who discontinued solifenacin, 85 were evaluated on the reason for discontinuation. The three most common reasons for discontinuation were adverse events (AEs) (35%), lack of efficacy (33%), and improvement in symptoms (16%). The aggravation of voiding symptoms was the most common AE leading to discontinuation. Retention was observed in 11 men. None of the demographical or clinical characteristics were significantly related to persistence. CONCLUSIONS Only 25% men with OAB and BPO remained on antimuscarinic add-on therapy after 1 year, mostly because of AEs and lack of efficacy. Realistic data should be added to what is already known about antimuscarinic treatment in men by including patients who were excluded or who dropped out of well-designed clinical trials.
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Affiliation(s)
- Y-S Lee
- Department of Urology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
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Choi KK, Kee J, Kwon DJ, Kim DK. Effect of hydrogen plasma on electroless-plating Ni-B films and its Cu diffusion barrier property. J Nanosci Nanotechnol 2014; 14:9599-9605. [PMID: 25971105 DOI: 10.1166/jnn.2014.10177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Electroless-plating Ni-B films have been evaluated for the application as the diffusion barrier and metal cap for copper integration. The effect of post plasma treatment in a hydrogen environment on the characteristics of Ni-B films such as chemical composition, surface roughness, crystallinity, and resistivity was investigated. By treating electroless-plating Ni-B films with H2 plasma, the resistance and the roughness of the films decreased. The leakage current of Ni-B bottom electrode/30-nm-thick Al2O3/Al top electrode structures improved after the H2 plasma treatment on the Ni-B films. 40 nm-thick electroless-plating Ni-B film was able to block Cu diffusion up to 350 degrees C.
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Park MS, Bhattarai K, Kim DK, Kang SW, Kim JO, Zhou J, Jang WY, Noyola M, Urbas A, Ku Z, Lee SJ. Enhanced transmission due to antireflection coating layer at surface plasmon resonance wavelengths. Opt Express 2014; 22:30161-30169. [PMID: 25606946 DOI: 10.1364/oe.22.030161] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We present experiments and analysis on enhanced transmission due to dielectric layer deposited on a metal film perforated with two-dimensional periodic array of subwavelength holes. The Si3N4 overlayer is applied on the perforated gold film (PGF) fabricated on GaAs substrate in order to boost the transmission of light at the surface plasmon polariton (SPP) resonance wavelengths in the mid- and long-wave IR regions, which is used as the antireflection (AR) coating layer between two dissimilar media (air and PGF/GaAs). It is experimentally shown that the transmission through the perforated gold film with 1.8 µm (2.0 µm) pitch at the first-order (second-order) SPP resonance wavelengths can be increased up to 83% (110%) by using a 750 nm (550 nm) thick Si3N4 layer. The SPP resonance leads to a dispersive resonant effective permeability (μeff ≠ 1) and thereby the refractive index matching condition for the conventional AR coating on the surface of a dielectric material cannot be applied to the resonant PGF structure. We develop and demonstrate the concept of AR condition based on the effective parameters of PGF. In addition, the maximum transmission (zero reflection) condition is analyzed numerically by using a three-layer model and a transfer matrix method is employed to determine the total reflection and transmission. The numerically calculated total reflection agrees very well with the reflection obtained by 3D full electromagnetic simulations of the entire structure. Destructive interference conditions for amplitude and phase to get zero reflection are well satisfied.
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Kang SK, Park YD, Kang SI, Kim DK, Kang KL, Lee SY, Lee HJ, Kim EC. Role of resistin in the inflammatory response induced by nicotine plus lipopolysaccharide in human periodontal ligament cells in vitro. J Periodontal Res 2014; 50:602-13. [PMID: 25393899 DOI: 10.1111/jre.12240] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/12/2014] [Indexed: 01/31/2023]
Abstract
BACKGROUND AND OBJECTIVE Resistin was recently reported to play a role in inflammation-related diseases such as arthritis. However, the precise role of resistin in chronic inflammatory diseases, such as periodontal disease, remains unclear. The aim of this study was to investigate the combined effects of nicotine and lipopolysaccharide (LPS) on the expression of resistin and to assess whether resistin expression influences the levels of inflammatory cytokines, extracellular matrix (ECM) molecules and MMPs in human periodontal ligament cells (PDLCs) stimulated with both nicotine and LPS. MATERIAL AND METHODS PDLCs were pretreated with isoproterenol or resistin-specific small interfering RNA (siRNA), stimulated with LPS plus nicotine for 24 h, and then monitored for the production of inflammatory mediators. The concentrations of prostaglandin E2 (PGE2) and nitric oxide (NO) were measured by radioimmunoassay and the Griess method, respectively. RT-PCR and western blot analysis were used to measure the levels of mRNA and protein, respectively. Western blot analysis was also used to assess the activation of various signal-transduction pathways. RESULTS Treatment with nicotine plus LPS up-regulated the expression of resistin mRNA and the production of resistin protein in PDLCs in a time- and concentration-dependent manner. Isoproterenol-mediated interference with the function of resistin, or siRNA-mediated knockdown of resistin expression, markedly attenuated the LPS plus nicotine-mediated stimulation of PGE2 and NO production, the production of cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase proteins and the expression of proinflammatory cytokines [tumor necrosis factor-α, interleukin (IL)-1β, IL-6 and IL-12] and MMPs (MMP-1, MMP-2 and MMP-9); however, these treatments restored the expression of ECM molecules. Furthermore, pretreatment with isoproterenol or resistin-specific siRNA blocked nicotine plus LPS-induced activation of phosphoinositide-3-kinase, glycogen synthase kinase-3 beta, β-catenin, p38, ERK, JNK and nuclear factor-κB. CONCLUSION This is the first study to show that the inhibition of resistin, by either a pharmacological or a genetic silencing approach, has anti-inflammatory effects. These effects include decreased levels of inflammatory cytokines and the prevention of ECM breakdown in a nicotine plus LPS-stimulated PDLC model.
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Affiliation(s)
- S K Kang
- Department of Oral Medicine, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Y D Park
- Department of Preventive and Society Dentistry, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - S I Kang
- Department of Oral and Maxillofacial Pathology, Research Center for Tooth and Periodontal Regeneration (MRC), School of Dentistry, Kyung Hee University, Seoul, Korea
| | - D K Kim
- Department of Oral Medicine, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - K L Kang
- Department of Periodontology, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - S Y Lee
- Department of Oral and Maxillofacial Pathology, Research Center for Tooth and Periodontal Regeneration (MRC), School of Dentistry, Kyung Hee University, Seoul, Korea
| | - H J Lee
- Department of Oral and Maxillofacial Pathology, Research Center for Tooth and Periodontal Regeneration (MRC), School of Dentistry, Kyung Hee University, Seoul, Korea
| | - E C Kim
- Department of Oral and Maxillofacial Pathology, Research Center for Tooth and Periodontal Regeneration (MRC), School of Dentistry, Kyung Hee University, Seoul, Korea
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Monguzzi A, Braga D, Gandini M, Holmberg VC, Kim DK, Sahu A, Norris DJ, Meinardi F. Broadband up-conversion at subsolar irradiance: triplet-triplet annihilation boosted by fluorescent semiconductor nanocrystals. Nano Lett 2014; 14:6644-50. [PMID: 25322197 DOI: 10.1021/nl503322a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Conventional solar cells exhibit limited efficiencies in part due to their inability to absorb the entire solar spectrum. Sub-band-gap photons are typically lost but could be captured if a material that performs up-conversion, which shifts photon energies higher, is coupled to the device. Recently, molecular chromophores that undergo triplet-triplet annihilation (TTA) have shown promise for efficient up-conversion at low irradiance, suitable for some types of solar cells. However, the molecular systems that have shown the highest up-conversion efficiency to date are ill suited to broadband light harvesting, reducing their applicability. Here we overcome this limitation by combining an organic TTA system with highly fluorescent CdSe semiconductor nanocrystals. Because of their broadband absorption and spectrally narrow, size-tunable fluorescence, the nanocrystals absorb the radiation lost by the TTA chromophores, returning this energy to the up-converter. The resulting nanocrystal-boosted system shows a doubled light-harvesting ability, which allows a green-to-blue conversion efficiency of ∼12.5% under 0.5 suns of incoherent excitation. This record efficiency at subsolar irradiance demonstrates that boosting the TTA by light-emitting nanocrystals can potentially provide a general route for up-conversion for different photovoltaic and photocatalytic applications.
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Affiliation(s)
- A Monguzzi
- Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca , 20125 Milano, Italy
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Song SJ, Kim KI, Song WJ, Kim DK, Bae DK. Treatment of distal femur fractures with locking plates: Comparison of periprosthetic fractures above total knee arthroplasty and non-periprosthetic fractures. Acta Orthop Belg 2014; 80:380-390. [PMID: 26280612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The purpose of the present study was to compare the results and plate fit of periprosthetic and non-periprosthetic distal femur fractures fixed with locking plates. Twenty-one periprosthetic fractures above a TKA and 27 non-periprosthetic fractures were retrospectively reviewed. The primary healing rate, bone union time, clinical and radiographic results, complications, and additional surgeries were compared between the two groups. The quality of the plate fit on the bone was also compared. There were no differences in the primary healing rate, bone union time, clinical and radiographic results between the two groups. The incidence of overall complication and additional surgeries did not differ (3/21 vs. 5/27, 1/21 vs. 4/27). Plate fit trouble was observed more frequently in periprosthetic fractures (10/21 vs. 1/27, p = 0.004). Fixation of distal femur fractures with locking plates provided satisfactory results with a low risk of complications and additional surgeries in both periprosthetic and non-periprosthetic fractures.
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Myung W, Jang JH, Yoon H, Lee SY, Kim DK. Therapeutic drug monitoring of mirtazapine in a routine outpatient setting in Asian psychiatric patients. Pharmacopsychiatry 2014; 47:210-4. [PMID: 25078020 DOI: 10.1055/s-0034-1383655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
INTRODUCTION Mirtazapine is an antidepressant that acts by enhancing serotonergic and noradrenergic neurotransmission. This study aimed to evaluate mirtazapine pharmacokinetic data from Korean psychiatric patients and to identify the potential factors affecting its steady-state concentration. METHODS A total of 337 samples of steady-state mirtazapine concentrations from 188 adult psychiatric outpatients were retrospectively evaluated. Serum mirtazapine concentrations were measured by high-performance liquid chromatography-tandem mass spectrometry. RESULTS Median mirtazapine concentration was 43.6 μg/L (164.37 nmol) at a daily dosage range of 7.5-60 mg. At the steady state, mirtazapine dose had a positive correlation with the drug concentration. Mean concentration-to-dose (C/D) ratio was 1.48 μg/L/mg/day (5.58 nmol/mg/day), which was higher than that in a previous study in Caucasian subjects. Age and paroxetine co-medication were positively associated with C/D ratio. Initial mirtazapine concentration and C/D ratio did not show an association with responsiveness in depressive patients. DISCUSSION This study presented the therapeutic drug monitoring data for mirtazapine and pharmacokinetic variations of mirtazapine in an Asian population. A further study could be helpful for clinical decision making based on the characteristics of patients.
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Affiliation(s)
- W Myung
- Department of Psychiatry, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J-H Jang
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - H Yoon
- Department of Psychiatry, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - S-Y Lee
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - D K Kim
- Department of Psychiatry, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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