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Lin CH, Lukas BE, Rajabi-Estarabadi A, May JR, Pang Y, Puyana C, Tsoukas M, Avanaki K. Rapid measurement of epidermal thickness in OCT images of skin. Sci Rep 2024; 14:2230. [PMID: 38278852 PMCID: PMC10817904 DOI: 10.1038/s41598-023-47051-6] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 11/08/2023] [Indexed: 01/28/2024] Open
Abstract
Epidermal thickness (ET) changes are associated with several skin diseases. To measure ET, segmentation of optical coherence tomography (OCT) images is essential; manual segmentation is very time-consuming and requires training and some understanding of how to interpret OCT images. Fast results are important in order to analyze ET over different regions of skin in rapid succession to complete a clinical examination and enable the physician to discuss results with the patient in real time. The well-known CNN-graph search (CNN-GS) methodology delivers highly accurate results, but at a high computational cost. Our objective was to build a computational core, based on CNN-GS, able to accurately segment OCT skin images in real time. We accomplished this by fine-tuning the hyperparameters, testing a range of speed-up algorithms including pruning and quantization, designing a novel pixel-skipping process, and implementing the final product with efficient use of core and threads on a multicore central processing unit (CPU). We name this product CNN-GS-skin. The method identifies two defined boundaries on OCT skin images in order to measure ET. We applied CNN-GS-skin to OCT skin images, taken from various body sites of 63 healthy individuals. Compared with CNN-GS, our described method reduced computation time by 130 [Formula: see text] with minimal reduction in ET determination accuracy (from 96.38 to 94.67%).
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Affiliation(s)
- Chieh-Hsi Lin
- Department of Computer Science, University of Illinois at Chicago, Chicago, IL, 60607, USA
| | - Brandon E Lukas
- Richard and Loan Hill Department of Bioengineering, University of Illinois at Chicago, Chicago, IL, 60607, USA
| | - Ali Rajabi-Estarabadi
- Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
- Department of Dermatology, Broward Health Medical Center, Fort Lauderdale, FL, USA
| | - Julia Rome May
- University of Illinois College of Medicine, Chicago, IL, 60607, USA
| | - Yanzhen Pang
- University of Illinois College of Medicine, Chicago, IL, 60607, USA
| | - Carolina Puyana
- Department of Dermatology, University of Illinois at Chicago, Chicago, IL, 60607, USA
| | - Maria Tsoukas
- Department of Dermatology, University of Illinois at Chicago, Chicago, IL, 60607, USA
| | - Kamran Avanaki
- Richard and Loan Hill Department of Bioengineering, University of Illinois at Chicago, Chicago, IL, 60607, USA.
- Department of Dermatology, University of Illinois at Chicago, Chicago, IL, 60607, USA.
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Shin S, Pang Y, Park J, Liu L, Lukas BE, Kim SH, Kim KW, Xu P, Berry DC, Jiang Y. Dynamic control of adipose tissue development and adult tissue homeostasis by platelet-derived growth factor receptor alpha. eLife 2020; 9:56189. [PMID: 32553115 PMCID: PMC7338051 DOI: 10.7554/elife.56189] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [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: 02/20/2020] [Accepted: 06/18/2020] [Indexed: 12/19/2022] Open
Abstract
Adipocytes arise from distinct progenitor populations during developmental and adult stages but little is known about how developmental progenitors differ from adult progenitors. Here, we investigate the role of platelet-derived growth factor receptor alpha (PDGFRα) in the divergent regulation of the two different adipose progenitor cells (APCs). Using in vivo adipose lineage tracking and deletion mouse models, we found that developmental PDGFRα+ cells are adipogenic and differentiated into mature adipocytes, and the deletion of Pdgfra in developmental adipose lineage disrupted white adipose tissue (WAT) formation. Interestingly, adult PDGFRα+ cells do not significantly contribute to adult adipogenesis, and deleting Pdgfra in adult adipose lineage did not affect WAT homeostasis. Mechanistically, embryonic APCs require PDGFRα for fate maintenance, and without PDGFRα, they underwent fate change from adipogenic to fibrotic lineage. Collectively, our findings indicate that PDGFRα+ cells and Pdgfra gene itself are differentially required for WAT development and adult WAT homeostasis.
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Affiliation(s)
- Sunhye Shin
- Department of Physiology and Biophysics, College of Medicine, The University of Illinois, Chicago, United States
| | - Yiyu Pang
- Department of Physiology and Biophysics, College of Medicine, The University of Illinois, Chicago, United States
| | - Jooman Park
- Department of Physiology and Biophysics, College of Medicine, The University of Illinois, Chicago, United States
| | - Lifeng Liu
- Department of Physiology and Biophysics, College of Medicine, The University of Illinois, Chicago, United States
| | - Brandon E Lukas
- Department of Physiology and Biophysics, College of Medicine, The University of Illinois, Chicago, United States
| | - Seung Hyeon Kim
- Department of Pharmacology, College of Medicine, The University of Illinois, Chicago, United States
| | - Ki-Wook Kim
- Department of Pharmacology, College of Medicine, The University of Illinois, Chicago, United States
| | - Pingwen Xu
- Division of Endocrinology, Department of Medicine, The University of Illinois at Chicago, Chicago, United States
| | - Daniel C Berry
- Division of Nutritional Sciences, Cornell University, Ithaca, United States
| | - Yuwei Jiang
- Department of Physiology and Biophysics, College of Medicine, The University of Illinois, Chicago, United States
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