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Ahn S, Lee N, Shin S, Choi C, Han Y, Park H, Choi D, Lim D. SU-F-T-662: Feasibility Study of Fe3O4/TaOx Nano Particles as a Radiosensitizer for Radiation Therapy. Med Phys 2016. [DOI: 10.1118/1.4956848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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77
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Andrews PJ, Poirrier AL, Lund VJ, Choi D. Outcomes in endoscopic sinus surgery: olfaction, nose scale and quality of life in a prospective cohort study. Clin Otolaryngol 2016; 41:798-803. [PMID: 27120034 DOI: 10.1111/coa.12665] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/25/2016] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To determine the efficacy of endoscopic sinus surgery (ESS) on olfactory function in chronic rhinosinusitis patients with nasal polyps (CRSwNP) and without nasal polyps (CRSsNP) and to compare the nasal obstruction and symptom evaluation (NOSE) scale before and after surgery. DESIGN A prospective cohort study SETTING: Royal National Throat and Nose and Ear Hospital, London UK. PARTICIPANTS One hundred and thirteen patients with CRS; 60 CRSwNP and 53 CRSsNP. OUTCOME MEASUREMENTS Olfaction was measured using both the University of Pennsylvania Smell Investigation Test (UPSIT) and the 'sense of smell' visual analogue scale (VAS). The NOSE scale, the sinonasal outcome test (SNOT 22) and the Lund-Kennedy (LK) surgeon reported scores were also measured pre- and postoperatively at 6 months. RESULTS The UPSIT psychophysical measurement significantly improved following ESS in the CRSwNP subgroup as did the patients perceived VAS sense of smell. However, in the CRSsNP subgroup, the improved VAS and UPSIT measurements were not significant. The NOSE, SNOT 22 and LK scores all improved significantly. The olfactory improvement as measured by the UPSIT correlated to the SNOT-22, but a correlation between the NOSE score and UPSIT was not found. CONCLUSIONS Endoscopic sinus surgery significantly improved the patient's perceived and measured sense of smell in the CRSwNP subgroup which is the most surgically responsive CRS subgroup. Additionally, improved olfaction in the CRSwNP subgroup is most likely to improve the patient's quality of life. Endoscopic sinus surgery significantly improved the NOSE scale in both CRS subgroups at 6 months following surgery.
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Kibbe MR, Hirsch AT, Mendelsohn FO, Davies MG, Pham H, Saucedo J, Marston W, Pyun WB, Min SK, Peterson BG, Comerota A, Choi D, Ballard J, Bartow RA, Losordo DW, Sherman W, Driver V, Perin EC. Erratum: Safety and efficacy of plasmid DNA expressing two isoforms of hepatocyte growth factor in patients with critical limb ischemia. Gene Ther 2016; 23:399. [DOI: 10.1038/gt.2016.9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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79
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Yavuz S, Kuru C, Choi D, Kargar A, Jin S, Bandaru PR. Graphene oxide as a p-dopant and an anti-reflection coating layer, in graphene/silicon solar cells. NANOSCALE 2016; 8:6473-6478. [PMID: 26939945 DOI: 10.1039/c5nr09143h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
It is shown that coating graphene-silicon (Gr/Si) Schottky junction based solar cells with graphene oxide (GO) improves the power conversion efficiency (PCE) of the cells, while demonstrating unprecedented device stability. The PCE has been shown to be increased to 10.6% (at incident radiation of 100 mW cm(-2)) for the Gr/Si solar cell with an optimal GO coating thickness compared to 3.6% for a bare/uncoated Gr/Si solar cell. The p-doping of graphene by the GO, which also serves as an antireflection coating (ARC) has been shown to be a main contributing factor to the enhanced PCE. A simple spin coating process has been used to apply GO with thickness commensurate with an anti-refection coating (ARC) and indicates the suitability of the developed methodology for large-scale solar cell assembly.
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Choi D, Negussie A, Seifabadi R, O’Grady N, Jiang L, Lozier J, Amalou H, Chang R, Wood B. Battery-powered electrified conductive vascular access device minimizes fibrin sheath adhesion. J Vasc Interv Radiol 2016. [DOI: 10.1016/j.jvir.2015.12.576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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81
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Choi D, Park J. The comparative study between nano-vitamin C application and generic vitamin C application in gingival fibroblast: experimental study and clinical application. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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82
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Choi D, Park J. Effect of the structural change of the implant neck area on the stress distribution to the surrounding tissues and the stability of the implant. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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83
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Choi D, Jo M, Lee E, Lee D, Choi J. Dienogest enhances autophagy induction in endometriotic cells by impairing activation of AKT, ERK1/2, and MTOR. Fertil Steril 2015. [DOI: 10.1016/j.fertnstert.2015.07.493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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84
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Youn JC, Lee SJ, Lee HS, Oh J, Hong N, Park S, Lee SH, Choi D, Rhee Y, Kang SM. Exercise capacity independently predicts bone mineral density and proximal femoral geometry in patients with acute decompensated heart failure. Osteoporos Int 2015; 26:2121-9. [PMID: 25963233 DOI: 10.1007/s00198-015-3112-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Accepted: 03/17/2015] [Indexed: 10/23/2022]
Abstract
UNLABELLED Heart failure is associated with increased risk of osteoporosis. We evaluated the prevalence and predictors of osteoporosis in hospitalized patients with ADHF using quantitative computed tomography. Osteoporosis and vertebral fracture are prevalent in patients with ADHF and exercise capacity independently predicts bone mass and femoral bone geometry. INTRODUCTION Heart failure is associated with reduced bone mass and increased risk of osteoporotic fractures. However, the prevalence and predictors of osteoporosis in hospitalized patients with acute decompensated heart failure (ADHF) are not well understood. METHODS Sixty-five patients (15 postmenopausal females and 50 males) with ADHF were prospectively and consecutively enrolled. After stabilization of heart failure symptoms, quantitative computed tomography for bone mineral density (BMD) and femoral geometry as well as biochemical, echocardiographic, and cardiopulmonary exercise tests were performed. RESULTS Fifteen postmenopausal female showed a high prevalence of osteoporosis (40%) and vertebral fracture (53%). Among 50 male patients, 12% had osteoporosis and 32% had osteopenia, while vertebral fracture was found in 12%. Lumbar volumetric BMD (vBMD) was significantly lower in ischemic patients than non-ischemic patients (107.9 ± 47.5 vs. 145.4 ± 40.9 mg/cm(3), p = 0.005) in male. Exercise capacity, indicated by peak oxygen consumption (VO2), was significantly associated with lumbar vBMD (r = 0.576, p < 0.001) and total hip areal BMD (aBMD) (r = 0.512, p = 0.001) and cortical thickness of the femur neck (r = 0.544, p = 0.001). When controlled for age, body mass index, N-terminal proBrain natriuretic protein (NT-proBNP), etiology of heart failure, hemoglobin, and thigh circumference, multivariate regression analysis revealed peak VO2 independently predicted lumbar vBMD (β = 0.448, p = 0.031), total hip aBMD (β = 0.547, p = 0.021), and cortical thickness of the femur neck (β = 0.590, p = 0.011). CONCLUSION In male patients with ADHF, osteoporosis and vertebral fracture are prevalent, and exercise capacity independently predicts bone mass and geometry. Given that heart failure patients with reduced exercise capacity carry a substantial increased risk of fracture, proper osteoporosis evaluation is important in these patients.
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Cho Y, Jeon K, Park J, Yoon C, Suh J, Youn T, Chae I, Choi D. Evolution of non-culprit coronary atherosclerotic plaques assessed by serial virtual histology-intravascular ultrasound in st-segment elevation myocardial infarction and chronic total occlusion. Atherosclerosis 2015. [DOI: 10.1016/j.atherosclerosis.2015.04.831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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86
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Merwick Á, Minhas Z, Curtis C, Thom M, Choi D, Mummery C. Intradural extramedullary spinal candida infection. Pract Neurol 2015; 15:400-4. [PMID: 26038585 DOI: 10.1136/practneurol-2014-001052] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/04/2015] [Indexed: 11/04/2022]
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87
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Cheon W, Cho J, Ahn S, Han Y, Choi D. SU-E-T-570: New Quality Assurance Method Using Motion Tracking for 6D Robotic Couches. Med Phys 2015. [DOI: 10.1118/1.4924932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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88
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Chung Y, Shin J, Yu J, Park W, Choi D, Huh S, Han Y, Kim J. SU-E-T-292: Dosimetric Advantage of Prone Breast Radiotherapy for Korean Left-Sided Breast Cancer Patients. Med Phys 2015. [DOI: 10.1118/1.4924654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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89
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Jung H, Kum O, Park H, Choi D, Han Y. SU-F-BRD-11: A Virtual Simulator Designed for Collision Prevention in Proton Therapy. Med Phys 2015. [DOI: 10.1118/1.4925190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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90
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Wang T, Choi D, Ramanathan T, Ruygrok P. Eight-year cohort study of octogenarians undergoing aortic valve replacement with or without concurrent coronary artery bypass grafting. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.04.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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91
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Wang T, Choi D, Ramanathan T, Ruygrok P. Eight-year cohort study of octogenarians undergoing aortic valve replacement with or without concurrent coronary artery bypass grafting. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.06.697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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92
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Wang T, Choi D, Gamble G, Ramanathan T, Ruygrok P. Prognostic utility of risk scores at predicting mortality and morbidity after combined aortic valve replacement and coronary artery bypass grafting. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.04.114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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93
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Wang T, Ramanathan T, Choi D, Ruygrok P. Aortic valve replacement with or without coronary artery bypass grafting: stroke outcomes and predictors. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.04.116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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94
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Wang T, Ramanathan T, Choi D, Ruygrok P. Aortic valve replacement with or without coronary artery bypass grafting: stroke outcomes and predictors. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.06.689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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95
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Wang T, Stewart R, Choi D, Harrmos S, Gamble G, Ramanathan T, White H. Utility of high-sensitivity troponins after combined aortic valve replacement and coronary artery bypass grafting towards defining myocardial infarction. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.06.707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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96
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Jang KM, Kim SH, Song KD, Kim YK, Lee SJ, Choi D. Differentiation of solid-type serous cystic neoplasm from neuroendocrine tumour in the pancreas: value of abdominal MRI with diffusion-weighted imaging in comparison with MDCT. Clin Radiol 2014; 70:153-60. [PMID: 25465293 DOI: 10.1016/j.crad.2014.10.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 10/16/2014] [Accepted: 10/17/2014] [Indexed: 11/19/2022]
Abstract
AIM To evaluate the value of abdominal MRI with diffusion-weighted (DW) imaging for differentiation of solid-type serous cystic neoplasm (SCN) from neuroendocrine tumour (NET) in the pancreas compared with that of CT. MATERIALS AND METHODS Ten solid-type SCNs and 15 NETs were included in the study. Qualitative and quantitative analyses were performed, and two observers independently reviewed CT and MRI images for diagnosis of solid-type SCNs. Fisher's exact test and Mann-Whitney U-test, diagnostic performance [receiver operating characteristic (ROC) curve analysis] were evaluated. RESULTS SCNs showed more frequently hypo-attenuation on unenhanced CT images and marked hyperintensity on T2-weighted images compared with NETs (p < 0.01). The density of the tumour on unenhanced CT images and the apparent diffusion coefficient (ADC) value of the tumour were significantly different between SCNs (mean 18.5 HU; mean 2.45 × 10(-3) mm(2)/s) and NETs (mean 39.2 HU; mean 1.51 × 10(-3) mm(2)/s; p < 0.001). In the differentiation of SCNs from NETs, diagnostic performance of MRI with DW images was significantly higher than that of CT imaging (p < 0.01). CONCLUSION Abdominal DW-MRI shows a higher diagnostic accuracy than abdominal CT imaging in the differentiation of solid-type SCNs from NETs.
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Sahai AA, Kim B, Choi D, Locquet A, Citrin DS. Mapping the nonlinear dynamics of a laser diode via its terminal voltage. OPTICS LETTERS 2014; 39:5630-5633. [PMID: 25360945 DOI: 10.1364/ol.39.005630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We show that the bifurcations between dynamical states originating in the nonlinear dynamics of an external-cavity semiconductor laser at constant current can be detected by its terminal voltage V. We experimentally vary the intensity fed back into the gain medium by the external cavity and show that the dc component V(dc) of V tracks the optical intensity-based bifurcation diagram. It is shown using computational results based upon the Lang-Kobayashi model that whereas optical intensity accesses the dynamical-state variable |E|, V is related to population-inversion carrier density N. The change in feedback strength affects N and thereby the quasi-Fermi energy level difference at the p-i-n junction band-gap of the gain medium. The change in the quasi-Fermi energy-level thereby changes the terminal voltage V. Thus V is shown to provide information on the change in the dynamical-state variable N, which complements the more conventionally probed optical intensity.
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Noh J, Kim K, Park W, Suh C, Huh S, Choi D, Kim Y, Keum K. Prognostic Significance of Internal Mammary Node Involvement in Patients With Clinical Stage IIIC Breast Cancer Who Received Neoadjuvant Chemotherapy, Surgery, and Radiation Therapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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99
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Choi J, Jo M, Lee E, Choi D. ERK1/2 is involved in luteal cell autophagy regulation during corpus luteum regression via an mTOR-independent pathway. Mol Hum Reprod 2014; 20:972-80. [DOI: 10.1093/molehr/gau061] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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100
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Lee K, Kim H, Choi D, Kim K. 981: Proteomic analysis of urinary exosomes in patients with non-small cell lung cancer and tuberculosis pleurisy using SWATH technique. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)50870-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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