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Laddi A, Goyal S, Himani, Savlania A. Vein segmentation and visualization of upper and lower extremities using convolution neural network. BIOMED ENG-BIOMED TE 2024; 0:bmt-2023-0331. [PMID: 38651783 DOI: 10.1515/bmt-2023-0331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 04/03/2024] [Indexed: 04/25/2024]
Abstract
OBJECTIVES The study focused on developing a reliable real-time venous localization, identification, and visualization framework based upon deep learning (DL) self-parametrized Convolution Neural Network (CNN) algorithm for segmentation of the venous map for both lower and upper limb dataset acquired under unconstrained conditions using near-infrared (NIR) imaging setup, specifically to assist vascular surgeons during venipuncture, vascular surgeries, or Chronic Venous Disease (CVD) treatments. METHODS A portable image acquisition setup has been designed to collect venous data (upper and lower extremities) from 72 subjects. A manually annotated image dataset was used to train and compare the performance of existing well-known CNN-based architectures such as ResNet and VGGNet with self-parameterized U-Net, improving automated vein segmentation and visualization. RESULTS Experimental results indicated that self-parameterized U-Net performs better at segmenting the unconstrained dataset in comparison with conventional CNN feature-based learning models, with a Dice score of 0.58 and displaying 96.7 % accuracy for real-time vein visualization, making it appropriate to locate veins in real-time under unconstrained conditions. CONCLUSIONS Self-parameterized U-Net for vein segmentation and visualization has the potential to reduce risks associated with traditional venipuncture or CVD treatments by outperforming conventional CNN architectures, providing vascular assistance, and improving patient care and treatment outcomes.
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Affiliation(s)
- Amit Laddi
- Biomedical Applications Group, CSIR-Central Scientific Instruments Organisation (CSIO), Chandigarh-160030, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh- 201 002, India
| | - Shivalika Goyal
- Biomedical Applications Group, CSIR-Central Scientific Instruments Organisation (CSIO), Chandigarh-160030, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh- 201 002, India
| | | | - Ajay Savlania
- Department of General Surgery, 29751 PGIMER , Chandigarh, India
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Skowicki M, Hürlimann D, Tarvirdipour S, Kyropoulou M, Schoenenberger CA, Gerber-Lemaire S, Palivan CG. FAP Targeting of Photosensitizer-Loaded Polymersomes for Increased Light-Activated Cell Killing. Biomacromolecules 2024; 25:754-766. [PMID: 38267014 PMCID: PMC10865352 DOI: 10.1021/acs.biomac.3c00943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/02/2023] [Accepted: 11/02/2023] [Indexed: 01/26/2024]
Abstract
As current chemo- and photodynamic cancer therapies are associated with severe side effects due to a lack of specificity and to systemic toxicity, innovative solutions in terms of targeting and controlled functionality are in high demand. Here, we present the development of a polymersome nanocarrier equipped with targeting molecules and loaded with photosensitizers for efficient uptake and light-activated cell killing. Polymersomes were self-assembled in the presence of photosensitizers from a mixture of nonfunctionalized and functionalized PDMS-b-PMOXA diblock copolymers, the latter designed for coupling with targeting ligands. By encapsulation inside the polymersomes, the photosensitizer Rose Bengal was protected, and its uptake into cells was mediated by the nanocarrier. Inhibitor of fibroblast activation protein α (FAPi), a ligand for FAP, was attached to the polymersomes' surface and improved their uptake in MCF-7 breast cancer cells expressing relatively high levels of FAP on their surface. Once internalized by MCF-7, irradiation of Rose Bengal-loaded FAPi-polymersomes generated reactive oxygen species at levels high enough to induce cell death. By combining photosensitizer encapsulation and specific targeting, polymersomes represent ideal candidates as therapeutic nanocarriers in cancer treatment.
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Affiliation(s)
- Michal Skowicki
- Department
of Chemistry, University of Basel, BPR 1096, Mattenstrasse 22, 4058 Basel, Switzerland
- NCCR-Molecular
Systems Engineering, BPR 1095, Mattenstrasse 24a, 4058 Basel, Switzerland
| | - Dimitri Hürlimann
- Department
of Chemistry, University of Basel, BPR 1096, Mattenstrasse 22, 4058 Basel, Switzerland
- NCCR-Molecular
Systems Engineering, BPR 1095, Mattenstrasse 24a, 4058 Basel, Switzerland
| | - Shabnam Tarvirdipour
- Department
of Chemistry, University of Basel, BPR 1096, Mattenstrasse 22, 4058 Basel, Switzerland
| | - Myrto Kyropoulou
- Department
of Chemistry, University of Basel, BPR 1096, Mattenstrasse 22, 4058 Basel, Switzerland
- NCCR-Molecular
Systems Engineering, BPR 1095, Mattenstrasse 24a, 4058 Basel, Switzerland
| | - Cora-Ann Schoenenberger
- Department
of Chemistry, University of Basel, BPR 1096, Mattenstrasse 22, 4058 Basel, Switzerland
- NCCR-Molecular
Systems Engineering, BPR 1095, Mattenstrasse 24a, 4058 Basel, Switzerland
| | - Sandrine Gerber-Lemaire
- Group
for Functionalized Biomaterials, Institute of Chemical Sciences and
Engineering, Ecole Polytechnique Fédérale
de Lausanne, CH-1015 Lausanne, Switzerland
| | - Cornelia G. Palivan
- Department
of Chemistry, University of Basel, BPR 1096, Mattenstrasse 22, 4058 Basel, Switzerland
- NCCR-Molecular
Systems Engineering, BPR 1095, Mattenstrasse 24a, 4058 Basel, Switzerland
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Qiu J, Lv B, Ge W, Zhang S, Zhang L, Mo F, Li Y, Zheng X. Superficial vessel-based near infrared-assisted patient position recognition and real-time monitoring system (VIPS) for radiotherapy: A proof-of-concept study. Med Phys 2023; 50:7967-7979. [PMID: 37727130 DOI: 10.1002/mp.16690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 07/26/2023] [Accepted: 07/28/2023] [Indexed: 09/21/2023] Open
Abstract
BACKGROUND The accuracy and precision of patient position in radiotherapy process have dramatic impacts on the tumor local control and therapy-related side effects, and there exist demands to explore effective positioning solutions, particularly in the era with great progress in imaging recognition and matching. PURPOSE Superficial vessel-based near infrared-assisted patient position recognition and real-time monitoring system (VIPS) was proposed to develop an automated, operator-independent and skin marker-free imaging system to improve patient setup and intrafractional motion monitoring. METHODS VIPS includes two components, the imaging module and the image alignment software. Using a simulated blood vessel model, multiple NIR sources with various wavelength and bolus (pseudo-skin) were evaluated in terms of imaging quality to determine the optimal light source and the upper limit of superficial fatty tissue thickness. Then the performance of VIPS with reference to either CBCT or laser setup system was conducted using 3D phantom and clinical cases enrolled into the registered clinical trial. The position displacement from VIPS and laser system was compared, as well as the systematic and random errors of VIPS setup procedure. RESULTS The NIR light source with the combined wavelengths of 760 nm + 940 nm (S760+940 nm ) provided the best performance among multiple tested light sources. The bolus (superficial fatty layer) thickness over 5 mm could dramatically compromise the NIR detection of vessels beneath. In the phantom study, the translational positional displacements according to VIPS guidance were within the submillimeter level with reference to CBCT, indicative of high setup accuracy. The clinical trial showed the prototype VIPS could effectively detect and control position displacement of patients in translational and rotational directions within an acceptable range, which was non-inferior to conventional laser/skin marker system. CONCLUSION This proof-of-concept study validated the feasibility and reliability of VIPS in guiding radiotherapy setup. However, limitations and technical challenges should be resolved prior to further clinical evaluation, including isocenter alignment, potential NIR image distortion and the impact of the superficial tissues on the recognition of vessels.
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Affiliation(s)
- Jianjian Qiu
- Department of Radiation Oncology, Huadong Hospital, Fudan University, Shanghai, China
| | - Bo Lv
- Department of Radiation Oncology, Huadong Hospital, Fudan University, Shanghai, China
| | - Weiqiang Ge
- Department of Radiation Oncology, Huadong Hospital, Fudan University, Shanghai, China
| | - Shujun Zhang
- Department of Radiation Oncology, Huadong Hospital, Fudan University, Shanghai, China
| | - Libo Zhang
- Department of Radiation Oncology, Huadong Hospital, Fudan University, Shanghai, China
| | - Fan Mo
- Department of Radiation Oncology, Huadong Hospital, Fudan University, Shanghai, China
| | - Ya Li
- Department of Radiation Oncology, Huadong Hospital, Fudan University, Shanghai, China
| | - Xiangpeng Zheng
- Department of Radiation Oncology, Huadong Hospital, Fudan University, Shanghai, China
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Hamza M, Skidanov R, Podlipnov V. Visualization of Subcutaneous Blood Vessels Based on Hyperspectral Imaging and Three-Wavelength Index Images. SENSORS (BASEL, SWITZERLAND) 2023; 23:8895. [PMID: 37960594 PMCID: PMC10650145 DOI: 10.3390/s23218895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 10/25/2023] [Accepted: 10/26/2023] [Indexed: 11/15/2023]
Abstract
Blood vessel visualization technology allows nursing staff to transition from traditional palpation or touch to locate the subcutaneous blood vessels to visualized localization by providing a clear visual aid for performing various medical procedures accurately and efficiently involving blood vessels; this can further improve the first-attempt puncture success rate for nursing staff and reduce the pain of patients. We propose a novel technique for hyperspectral visualization of blood vessels in human skin. An experiment with six participants with different skin types, race, and nationality backgrounds is described. A mere separation of spectral layers for different skin types is shown to be insufficient. The use of three-wavelength indices in imaging has shown a significant improvement in the quality of results compared to using only two-wavelength indices. This improvement can be attributed to an increase in the contrast ratio, which can be as high as 25%. We propose and implement a technique for finding new index formulae based on an exhaustive search and a binary blood-vessel image obtained through an expert assessment. As a result of the search, a novel index formula was deduced, allowing high-contrast blood vessel images to be generated for any skin type.
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Affiliation(s)
- Mohammed Hamza
- Department of Information Technology, Samara National Research University, Moskovskoye Shosse 34, 443086 Samara, Russia; (M.H.); (V.P.)
| | - Roman Skidanov
- Department of Information Technology, Samara National Research University, Moskovskoye Shosse 34, 443086 Samara, Russia; (M.H.); (V.P.)
- IPSI RAS—Branch of the FSRC “Crystallography and Photonics” RAS, Molodogvardeiskaya St. 151, 443001 Samara, Russia
| | - Vladimir Podlipnov
- Department of Information Technology, Samara National Research University, Moskovskoye Shosse 34, 443086 Samara, Russia; (M.H.); (V.P.)
- IPSI RAS—Branch of the FSRC “Crystallography and Photonics” RAS, Molodogvardeiskaya St. 151, 443001 Samara, Russia
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Dave J, Chand S, Gs R, Raj A, Sp P, Sivaprakasam M. Multispectral Imaging for Vein Localization and Contrast Enhancement. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2023; 2023:1-4. [PMID: 38083397 DOI: 10.1109/embc40787.2023.10341080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Intravenous (IV) catheterization is a common procedure. Still, there is a 26% chance of the first attempt catheterization failure due to the changing visibility of veins because of the patient's skin tone and body fat content. Ultrasound assistive devices help locate deeper veins but are not practical in emergencies, and transillumination assistive devices have a low field of view. Commercial near-infrared (NIR) imaging devices are effective in vein localization but are expensive and are not used in low-cost clinical settings. To overcome this, NIR Multispectral Imaging (MSI) was used to find the optimal wavelength that provides the enhanced visualization of veins for all skin types and Body Mass Index (BMI). The band with the highest vein-to-skin contrast ratio was selected and contrast enhancement was done using our proposed method. The primary blocks of the proposed method are Gamma correction, Contrast Limited Adaptive Histogram Equalization (CLAHE), Adaptive Thresholding, and image Fusion. The optimal spectral range was found to be 814-876 nm and our method increased the contrast by 0.41, 0.375, and 0.39 for fair, brown, and dark brown skin types, respectively, with different BMI.Clinical relevance- From the study, we can develop a potentially low-cost vein localization assistive device for training medical and nursing students and use it in emergencies for venous access to improve confidence in IV catheterization.
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Alberto EC, Mastrianni A, Sullivan TM, McCarthy KH, Milestone ZP, Chung L, Cha N, Mapelli E, Sippel GJ, Marsic I, O'Connell KJ, Sarcevic A, Burd RS. Factors Affecting Peripheral Intravenous Catheter Placement During Pediatric Trauma Resuscitation. J Surg Res 2023; 283:241-248. [PMID: 36423472 PMCID: PMC9990681 DOI: 10.1016/j.jss.2022.10.048] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 09/16/2022] [Accepted: 10/18/2022] [Indexed: 11/22/2022]
Abstract
INTRODUCTION Intravenous access is required for resuscitation of injured patients but may be delayed in children because of challenges associated with peripheral intravenous (PIV) catheter placement. Early identification of factors predisposing patients to difficult PIV placement can assist in deciding strategies for timely intravenous access. METHODS We conducted a retrospective, video-based review of injured children and adolescents treated between April 2018 and May 2019. Patient demographic, physiological, injury, and resuscitation characteristics were obtained from the patient record, including age, race, weight, injury type, Injury Severity Score, initial systolic blood pressure, initial Glasgow Coma Score, intubation status, activation level, and presence of prearrival notification. Video review was used to determine the time to PIV placement, the number of attempts required, the purpose for additional access, and the reason for abandonment of PIV placement. Multivariable regressions were used to determine factors associated with successful placement. RESULTS During the study period, 154 consented patients underwent attempts at PIV placement in the trauma bay. Placement was successful in 139 (90.3%) patients. Older patients (OR [odds ratio]: 0.9, 95% confidence interval [CI]: 0.9, 0.9) and patients who required the highest level activation response (OR: 0.0, 95% CI: 0.0, 0.3) were less likely to have an attempt at PIV placement abandoned. Children with nonblunt injuries (OR: 11.6, 95% CI: 1.3, 119.2) and pre-existing access (OR: 39.6, 95% CI: 7.0, 350.6) were more likely to have an attempt at PIV placement abandoned. Among patients with successful PIV placement, the time required for establishing PIV access was faster as age increased (-0.5 s, 95% CI: -1.1, -0.0). CONCLUSIONS Younger age was associated with abandonment of PIV attempts and, when successful, increased time to placement. Strategies to improve successful PIV placement and alternate routes of access should be considered early to prevent treatment delays in younger children.
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Affiliation(s)
- Emily C Alberto
- Division of Trauma and Burn Surgery, Children's National Hospital, Washington, District of Columbia
| | - Angela Mastrianni
- College of Computing and Informatics, Drexel University, Philadelphia, Pennsylvania
| | - Travis M Sullivan
- Division of Trauma and Burn Surgery, Children's National Hospital, Washington, District of Columbia
| | - Kathleen H McCarthy
- Division of Trauma and Burn Surgery, Children's National Hospital, Washington, District of Columbia
| | - Zachary P Milestone
- Division of Trauma and Burn Surgery, Children's National Hospital, Washington, District of Columbia
| | - Lauren Chung
- College of Computing and Informatics, Drexel University, Philadelphia, Pennsylvania
| | - Nicholas Cha
- College of Computing and Informatics, Drexel University, Philadelphia, Pennsylvania
| | - Emily Mapelli
- College of Computing and Informatics, Drexel University, Philadelphia, Pennsylvania
| | - Genevieve J Sippel
- Division of Trauma and Burn Surgery, Children's National Hospital, Washington, District of Columbia
| | - Ivan Marsic
- Department of Electrical and Computer Engineering, Rutgers University, Piscataway, New Jersey
| | - Karen J O'Connell
- Division of Emergency Medicine, Children's National Hospital, Washington, District of Columbia
| | - Aleksandra Sarcevic
- College of Computing and Informatics, Drexel University, Philadelphia, Pennsylvania
| | - Randall S Burd
- Division of Trauma and Burn Surgery, Children's National Hospital, Washington, District of Columbia.
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Biocompatible Optical Fibers Made of Regenerated Cellulose and Recombinant Cellulose-Binding Spider Silk. Biomimetics (Basel) 2023; 8:biomimetics8010037. [PMID: 36648823 PMCID: PMC9844472 DOI: 10.3390/biomimetics8010037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/20/2022] [Accepted: 01/12/2023] [Indexed: 01/18/2023] Open
Abstract
The fabrication of green optical waveguides based on cellulose and spider silk might allow the processing of novel biocompatible materials. Regenerated cellulose fibers are used as the core and recombinantly produced spider silk proteins eADF4(C16) as the cladding material. A detected delamination between core and cladding could be circumvented by using a modified spider silk protein with a cellulose-binding domain-enduring permanent adhesion between the cellulose core and the spider silk cladding. The applied spider silk materials were characterized optically, and the theoretical maximum data rate was determined. The results show optical waveguide structures promising for medical applications, for example, in the future.
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