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Advances in Computer Assisted Tomography: New Technologies for Improving Biomedical Image, Sensor and Signal Processing

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Sensing and Imaging".

Deadline for manuscript submissions: 5 September 2025 | Viewed by 1681

Special Issue Editors


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Guest Editor
Biodesign Institute, Arizona State University, Tempe, AZ 85281, USA
Interests: computer vision; image processing; physiological sensing; biomedical engineering; deep learning; machine learning; video processing
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Cancer Hospital Chinese Academy of Medical Sciences, Shenzhen Center, Shenzhen 518071, China
Interests: medical physics; image processing; mobile health; proton therapy

Special Issue Information

Dear Colleagues,

Computer-assisted tomography includes well-established techniques that generate detailed internal images of human body such as CT and MRI scans. It is an important tool with many applications including in medical diagnosis, biological studies and therapeutic decision-making processes. Powered by recent advances in sensor technology, computer vision, machine learning, artificial intelligence and big data, the field is poised for expansive development that will significantly improve the accuracy and efficiency of recognizing, classifying and segmenting high-risk health indicators. Progress in these areas should assist physicians and radiologists in achieving more accurate medical diagnosis and better clinical outcomes for their patients. Topics of interest for this Special Issue include: functional CT and MR imaging; advanced techniques for CT and MR and artificial intelligence-powered CT / MR analysis.

Dr. Dangdang Shao
Dr. Chenbin Liu
Guest Editors

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Keywords

  • computer-assisted tomography
  • artificial intelligence
  • medical imaging
  • computer-aided diagnosis
  • computer vision
  • tomographic sensors

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Published Papers (1 paper)

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Research

14 pages, 2268 KiB  
Article
A Retinal Vessel Segmentation Method Based on the Sharpness-Aware Minimization Model
by Iqra Mariam, Xiaorong Xue and Kaleb Gadson
Sensors 2024, 24(13), 4267; https://doi.org/10.3390/s24134267 - 30 Jun 2024
Cited by 1 | Viewed by 1129
Abstract
Retinal vessel segmentation is crucial for diagnosing and monitoring various eye diseases such as diabetic retinopathy, glaucoma, and hypertension. In this study, we examine how sharpness-aware minimization (SAM) can improve RF-UNet’s generalization performance. RF-UNet is a novel model for retinal vessel segmentation. We [...] Read more.
Retinal vessel segmentation is crucial for diagnosing and monitoring various eye diseases such as diabetic retinopathy, glaucoma, and hypertension. In this study, we examine how sharpness-aware minimization (SAM) can improve RF-UNet’s generalization performance. RF-UNet is a novel model for retinal vessel segmentation. We focused our experiments on the digital retinal images for vessel extraction (DRIVE) dataset, which is a benchmark for retinal vessel segmentation, and our test results show that adding SAM to the training procedure leads to notable improvements. Compared to the non-SAM model (training loss of 0.45709 and validation loss of 0.40266), the SAM-trained RF-UNet model achieved a significant reduction in both training loss (0.094225) and validation loss (0.08053). Furthermore, compared to the non-SAM model (training accuracy of 0.90169 and validation accuracy of 0.93999), the SAM-trained model demonstrated higher training accuracy (0.96225) and validation accuracy (0.96821). Additionally, the model performed better in terms of sensitivity, specificity, AUC, and F1 score, indicating improved generalization to unseen data. Our results corroborate the notion that SAM facilitates the learning of flatter minima, thereby improving generalization, and are consistent with other research highlighting the advantages of advanced optimization methods. With wider implications for other medical imaging tasks, these results imply that SAM can successfully reduce overfitting and enhance the robustness of retinal vessel segmentation models. Prospective research avenues encompass verifying the model on vaster and more diverse datasets and investigating its practical implementation in real-world clinical situations. Full article
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