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Yap MH, Cassidy B, Byra M, Liao TY, Yi H, Galdran A, Chen YH, Brüngel R, Koitka S, Friedrich CM, Lo YW, Yang CH, Li K, Lao Q, Ballester MAG, Carneiro G, Ju YJ, Huang JD, Pappachan JM, Reeves ND, Chandrabalan V, Dancey D, Kendrick C. Diabetic foot ulcers segmentation challenge report: Benchmark and analysis. Med Image Anal 2024; 94:103153. [PMID: 38569380 DOI: 10.1016/j.media.2024.103153] [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: 06/27/2023] [Revised: 01/30/2024] [Accepted: 03/20/2024] [Indexed: 04/05/2024]
Abstract
Monitoring the healing progress of diabetic foot ulcers is a challenging process. Accurate segmentation of foot ulcers can help podiatrists to quantitatively measure the size of wound regions to assist prediction of healing status. The main challenge in this field is the lack of publicly available manual delineation, which can be time consuming and laborious. Recently, methods based on deep learning have shown excellent results in automatic segmentation of medical images, however, they require large-scale datasets for training, and there is limited consensus on which methods perform the best. The 2022 Diabetic Foot Ulcers segmentation challenge was held in conjunction with the 2022 International Conference on Medical Image Computing and Computer Assisted Intervention, which sought to address these issues and stimulate progress in this research domain. A training set of 2000 images exhibiting diabetic foot ulcers was released with corresponding segmentation ground truth masks. Of the 72 (approved) requests from 47 countries, 26 teams used this data to develop fully automated systems to predict the true segmentation masks on a test set of 2000 images, with the corresponding ground truth segmentation masks kept private. Predictions from participating teams were scored and ranked according to their average Dice similarity coefficient of the ground truth masks and prediction masks. The winning team achieved a Dice of 0.7287 for diabetic foot ulcer segmentation. This challenge has now entered a live leaderboard stage where it serves as a challenging benchmark for diabetic foot ulcer segmentation.
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Affiliation(s)
- Moi Hoon Yap
- Department of Computing and Mathematics, Manchester Metropolitan University, John Dalton Building, Chester Street, Manchester M1 5GD, United Kingdom; Lancashire Teaching Hospitals NHS Trust, Preston, PR2 9HT, United Kingdom.
| | - Bill Cassidy
- Department of Computing and Mathematics, Manchester Metropolitan University, John Dalton Building, Chester Street, Manchester M1 5GD, United Kingdom
| | - Michal Byra
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, Poland; RIKEN Center for Brain Science, Wako, Japan
| | - Ting-Yu Liao
- Department of Computer Science, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan
| | - Huahui Yi
- West China Biomedical Big Data Center, West China Hospital, Sichuan University, Chengdu, China
| | - Adrian Galdran
- BCN Medtech, Universitat Pompeu Fabra, Barcelona, Spain; AIML, University of Adelaide, Australia
| | - Yung-Han Chen
- Institute of Electronics, National Yang Ming Chiao Tung University, No. 1001, University Road, Hsinchu 300, Taiwan
| | - Raphael Brüngel
- Department of Computer Science, University of Applied Sciences and Arts Dortmund (FH Dortmund), Emil-Figge-Str. 42, 44227 Dortmund, Germany; Institute for Medical Informatics, Biometry and Epidemiology (IMIBE), University Hospital Essen, Zweigertstr. 37, 45130 Essen, Germany; Institute for Artificial Intelligence in Medicine (IKIM), University Hospital Essen, Girardetstr. 2, 45131 Essen, Germany
| | - Sven Koitka
- Institute for Artificial Intelligence in Medicine (IKIM), University Hospital Essen, Girardetstr. 2, 45131 Essen, Germany; Institute of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Hufelandstr. 55, 45147 Essen, Germany
| | - Christoph M Friedrich
- Department of Computer Science, University of Applied Sciences and Arts Dortmund (FH Dortmund), Emil-Figge-Str. 42, 44227 Dortmund, Germany; Institute for Medical Informatics, Biometry and Epidemiology (IMIBE), University Hospital Essen, Zweigertstr. 37, 45130 Essen, Germany
| | - Yu-Wen Lo
- Department of Computer Science, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan
| | - Ching-Hui Yang
- Department of Computer Science, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan
| | - Kang Li
- West China Biomedical Big Data Center, West China Hospital, Sichuan University, Chengdu, China; Shanghai Artificial Intelligence Laboratory, Shanghai, China
| | - Qicheng Lao
- School of Artificial Intelligence, Beijing University of Posts and Telecommunications, Beijing, China; Shanghai Artificial Intelligence Laboratory, Shanghai, China
| | | | | | - Yi-Jen Ju
- Institute of Electronics, National Yang Ming Chiao Tung University, No. 1001, University Road, Hsinchu 300, Taiwan
| | - Juinn-Dar Huang
- Institute of Electronics, National Yang Ming Chiao Tung University, No. 1001, University Road, Hsinchu 300, Taiwan
| | - Joseph M Pappachan
- Lancashire Teaching Hospitals NHS Trust, Preston, PR2 9HT, United Kingdom; Department of Life Sciences, Manchester Metropolitan University, Manchester, M1 5GD, United Kingdom
| | - Neil D Reeves
- Department of Life Sciences, Manchester Metropolitan University, Manchester, M1 5GD, United Kingdom
| | | | - Darren Dancey
- Department of Computing and Mathematics, Manchester Metropolitan University, John Dalton Building, Chester Street, Manchester M1 5GD, United Kingdom
| | - Connah Kendrick
- Department of Computing and Mathematics, Manchester Metropolitan University, John Dalton Building, Chester Street, Manchester M1 5GD, United Kingdom
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Shi Y, Han L, González-Moreno P, Dancey D, Huang W, Zhang Z, Liu Y, Huang M, Miao H, Dai M. A fast Fourier convolutional deep neural network for accurate and explainable discrimination of wheat yellow rust and nitrogen deficiency from Sentinel-2 time series data. Front Plant Sci 2023; 14:1250844. [PMID: 37860254 PMCID: PMC10582577 DOI: 10.3389/fpls.2023.1250844] [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] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 09/13/2023] [Indexed: 10/21/2023]
Abstract
Introduction Accurate and timely detection of plant stress is essential for yield protection, allowing better-targeted intervention strategies. Recent advances in remote sensing and deep learning have shown great potential for rapid non-invasive detection of plant stress in a fully automated and reproducible manner. However, the existing models always face several challenges: 1) computational inefficiency and the misclassifications between the different stresses with similar symptoms; and 2) the poor interpretability of the host-stress interaction. Methods In this work, we propose a novel fast Fourier Convolutional Neural Network (FFDNN) for accurate and explainable detection of two plant stresses with similar symptoms (i.e. Wheat Yellow Rust And Nitrogen Deficiency). Specifically, unlike the existing CNN models, the main components of the proposed model include: 1) a fast Fourier convolutional block, a newly fast Fourier transformation kernel as the basic perception unit, to substitute the traditional convolutional kernel to capture both local and global responses to plant stress in various time-scale and improve computing efficiency with reduced learning parameters in Fourier domain; 2) Capsule Feature Encoder to encapsulate the extracted features into a series of vector features to represent part-to-whole relationship with the hierarchical structure of the host-stress interactions of the specific stress. In addition, in order to alleviate over-fitting, a photochemical vegetation indices-based filter is placed as pre-processing operator to remove the non-photochemical noises from the input Sentinel-2 time series. Results and discussion The proposed model has been evaluated with ground truth data under both controlled and natural conditions. The results demonstrate that the high-level vector features interpret the influence of the host-stress interaction/response and the proposed model achieves competitive advantages in the detection and discrimination of yellow rust and nitrogen deficiency on Sentinel-2 time series in terms of classification accuracy, robustness, and generalization.
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Affiliation(s)
- Yue Shi
- School of Electronic and Electrical Engineering, University of Leeds, Leeds, United Kingdom
| | - Liangxiu Han
- Department of Computing and Mathematics, Manchester Metropolitan University, Manchester, United Kingdom
| | | | - Darren Dancey
- Department of Computing and Mathematics, Manchester Metropolitan University, Manchester, United Kingdom
| | - Wenjiang Huang
- Aerospace Information research Institute, Chinese Academy of Sciences (CAS), Beijing, China
| | - Zhiqiang Zhang
- School of Electronic and Electrical Engineering, University of Leeds, Leeds, United Kingdom
| | - Yuanyuan Liu
- Department of Computer Science, The University of Manchester, Manchester, United Kingdom
| | - Mengning Huang
- School of Computing, Beijing University of Technology, Beijing, China
| | - Hong Miao
- School of Mechanical Engineering, Yangzhou University, Yangzhou, China
| | - Min Dai
- School of Mechanical Engineering, Yangzhou University, Yangzhou, China
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Rashid A, Saleem J, Amin M, Ali SM, Khan AA, Qureshi MB, Ali S, Dancey D, Nawaz R. Investigation of 9000 hours multi-stress aging effects on High-Temperature Vulcanized Silicone Rubber with silica (nano/micro) filler hybrid composite insulator. PLoS One 2021; 16:e0253372. [PMID: 34319996 PMCID: PMC8318273 DOI: 10.1371/journal.pone.0253372] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 06/04/2021] [Indexed: 12/01/2022] Open
Abstract
Degradation in the polymeric insulators is caused due to the environmental stresses. The main aim of this paper is to explore the improved aging characteristics of hybrid samples by adding nano/micro silica in High Temperature Vulcanized Silicone Rubber (HTV-SiR) under long term accelerated aging conditions for 9000 hours. As HTV-SiR is unable to sustain environmental stresses for a long time, thus a long term accelerated aging behavior is an important phenomenon to be considered for field application. The aging characteristics of nano/micro filled HTV-SiR are analyzed by using techniques such as Scanning Electron Microscopy (SEM), Leakage Current (LC), Fourier Transform Infrared Microscopy (FTIR), Hydrophobicity Classification (HC), and breakdown strength for the aging time of 9000 hours. FTIR and leakage currents are measured after every cycle. All the co-filled samples revealed escalated aging characteristics as compared to the neat sample except the SN8 sample (8% nano-silica+20% micro-silica) after 9000 hours of aging. The highest loading of 6% and 8% nano-silica with 20% micro-silica do not contribute to the improved performance when compared with the neat and hybrid samples. However, from the critical experimental analysis, it is deduced that SN2 sample (2% nano-silica+20% micro-silica) is highly resistant to the long term accelerated aging conditions. SN2 has no cracks, lower loss percentages in the important FTIR absorption peaks, higher breakdown strength and superior HC after aging as compared to the unfilled and hybrid samples.
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Affiliation(s)
- Arooj Rashid
- Electrical and Computer Engineering Department, COMSATS University, Abbottabad, KPK, Pakistan
| | - Jawad Saleem
- Electrical and Computer Engineering Department, COMSATS University, Abbottabad, KPK, Pakistan
| | - Muhammad Amin
- Ghulam Ishaq Institute of Engineering Sciences, Swabi, KPK, Pakistan
| | - Sahibzada Muhammad Ali
- Electrical and Computer Engineering Department, COMSATS University, Abbottabad, KPK, Pakistan
| | - Aftab Ahmad Khan
- Electrical and Computer Engineering Department, COMSATS University, Abbottabad, KPK, Pakistan
| | - Muhammad Bilal Qureshi
- Electrical and Computer Engineering Department, COMSATS University, Abbottabad, KPK, Pakistan
| | - Sara Ali
- School of Mechanical and Manufacturing Engineering (SMME), National University of Sciences and Technology, Islamabad, Pakistan
| | - Darren Dancey
- Manchester Metropolitan University, Manchester, United Kingdom
| | - Raheel Nawaz
- Manchester Metropolitan University, Manchester, United Kingdom
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Chahine-Malus N, Stewart T, Lapinsky SE, Marras T, Dancey D, Leung R, Mehta S. Utility of routine chest radiographs in a medical-surgical intensive care unit: a quality assurance survey. Crit Care 2001; 5:271-5. [PMID: 11737902 PMCID: PMC83854 DOI: 10.1186/cc1045] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2001] [Accepted: 08/16/2001] [Indexed: 01/31/2023] Open
Abstract
OBJECTIVE To determine the utility of routine chest radiographs (CXRs) in clinical decision-making in the intensive care unit (ICU). DESIGN A prospective evaluation of CXRs performed in the ICU for a period of 6 months. A questionnaire was completed for each CXR performed, addressing the indication for the radiograph, whether it changed the patient's management, and how it did so. SETTING A 14-bed medical-surgical ICU in a university-affiliated, tertiary care hospital. PATIENTS A total of 645 CXRs were analyzed in 97 medical patients and 205 CXRs were analyzed in 101 surgical patients. RESULTS Of the 645 CXRs performed in the medical patients, 127 (19.7%) led to one or more management changes. In the 66 surgical patients with an ICU stay <48 hours, 15.4% of routine CXRs changed management. In 35 surgical patients with an ICU stay > or = 48 hours, 26% of the 100 routine films changed management. In both the medical and surgical patients, the majority of changes were related to an adjustment of a medical device. CONCLUSIONS Routine CXRs have some value in guiding management decisions in the ICU. Daily CXRs may not, however, be necessary for all patients.
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