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Ali A, Colombe L, Mélanie P, Agnes P, Meryem N, Samuel R, Guénolé G, Jean‐Hubert C, Rodolphe K, Franck B. Comparison of facial skin ageing in healthy Asian and Caucasian females quantified by in vivo line-field confocal optical coherence tomography 3D imaging. Skin Res Technol 2024; 30:e13643. [PMID: 39221700 PMCID: PMC11367555 DOI: 10.1111/srt.13643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 02/19/2024] [Indexed: 09/04/2024]
Abstract
BACKGROUND Quantitative biomarkers of facial skin aging were investigated in 109 healthy Asian female volunteers, aged 20 to 70 years. MATERIALS AND METHODS In vivo 3D Line-field Confocal Optical Coherence Tomography (LC-OCT) imaging, enhanced by Artificial Intelligence (AI)-based quantification algorithms, was utilized to compute various metrics, including stratum corneum thickness (SC), viable epidermal (VE) thickness, and Dermal-Epidermal Junction (DEJ) undulation along with cellular metrics for the temple, cheekbone, and mandible. RESULTS Comparison with data from a cohort of healthy Caucasian volunteers revealed similarities in the variations of stratum corneum and viable epidermis layers, as well as cellular shape and size with age in both ethnic groups. However, specific findings emerged, such as larger, more heterogeneous nuclei in both layers, demonstrated by an increase in nuclei volume and their standard deviation, and increased network atypia, all showing significant age-related variations. Caucasian females exhibited a flatter and more homogeneous epidermis, evidenced by a decreased standard deviation of the number of layers, and a less dense cellular network with fewer cells per layer, indicated by a decrease in cell surface density. CONCLUSION Ethnicity-wise comparisons highlighted distinct biological features specific to each population. Asian individuals showed significantly higher DEJ undulation, higher compactness, and lower cell network atypia compared to their Caucasian counterparts across age groups. Differences in stratum corneum and viable epidermal thickness on the cheekbone were also significant. LC-OCT 3D imaging provides valuable insights into the aging process in different populations and underscores inherent biological differences between Caucasian and Asian female volunteers.
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Affiliation(s)
- Assi Ali
- LVMH Recherche, Saint Jean de BrayeParisFrance
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2
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Cappilli S, Paradisi A, Di Stefani A, Palmisano G, Pellegrino L, D’Onghia M, Ricci C, Tognetti L, Verzì AE, Rubegni P, Del Marmol V, Lacarrubba F, Cinotti E, Suppa M, Peris K. Line-Field Confocal Optical Coherence Tomography: A New Skin Imaging Technique Reproducing a "Virtual Biopsy" with Evolving Clinical Applications in Dermatology. Diagnostics (Basel) 2024; 14:1821. [PMID: 39202308 PMCID: PMC11353504 DOI: 10.3390/diagnostics14161821] [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: 06/28/2024] [Revised: 08/14/2024] [Accepted: 08/19/2024] [Indexed: 09/03/2024] Open
Abstract
BACKGROUND Line-field confocal optical coherence tomography is a novel technology able to reproduce a "virtual biopsy" of the skin. The aim of this review is to explore the application of line-field confocal optical coherence tomography (LC-OCT) in various skin diseases, covering skin cancers, inflammatory and infectious skin diseases, genetic diseases, cosmetic procedures, and less common disorders. METHODS Study selection was conducted based on LC-OCT and using pertinent MeSh terms, following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines from inception to March 2024; to evaluate the quality and risk of bias of studies, Quality Assessment of Diagnostic Accuracy Studies-2 (QUADAS-2) was used. RESULTS the search retrieved 154 papers according to the selection criteria; after removing publications by one or more of the exclusion criteria, a total of 96 studies were found to be suitable for the analysis. CONCLUSIONS Increasing evidence supports the use of LC-OCT as an adjunctive diagnostic tool for the in vivo diagnosis of a variety of skin tumors. As this device can be considered a "bridge" between dermoscopy and histopathology, widening applications in numerous fields of clinical dermatology, including inflammatory skin disease treatment, presurgical mapping, cosmetic procedures, and monitoring of non-invasive therapies, have been explored.
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Affiliation(s)
- Simone Cappilli
- Dermatologia, Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.P.); (A.D.S.); (G.P.); (L.P.); (K.P.)
- UOC di Dermatologia, Dipartimento di Scienze Mediche e Chirurgiche, Fondazione Policlinico Universitario A. Gemelli—IRCCS, 00168 Rome, Italy
| | - Andrea Paradisi
- Dermatologia, Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.P.); (A.D.S.); (G.P.); (L.P.); (K.P.)
- UOC di Dermatologia, Dipartimento di Scienze Mediche e Chirurgiche, Fondazione Policlinico Universitario A. Gemelli—IRCCS, 00168 Rome, Italy
| | - Alessandro Di Stefani
- Dermatologia, Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.P.); (A.D.S.); (G.P.); (L.P.); (K.P.)
- UOC di Dermatologia, Dipartimento di Scienze Mediche e Chirurgiche, Fondazione Policlinico Universitario A. Gemelli—IRCCS, 00168 Rome, Italy
| | - Gerardo Palmisano
- Dermatologia, Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.P.); (A.D.S.); (G.P.); (L.P.); (K.P.)
- UOC di Dermatologia, Dipartimento di Scienze Mediche e Chirurgiche, Fondazione Policlinico Universitario A. Gemelli—IRCCS, 00168 Rome, Italy
| | - Luca Pellegrino
- Dermatologia, Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.P.); (A.D.S.); (G.P.); (L.P.); (K.P.)
- UOC di Dermatologia, Dipartimento di Scienze Mediche e Chirurgiche, Fondazione Policlinico Universitario A. Gemelli—IRCCS, 00168 Rome, Italy
| | - Martina D’Onghia
- Dermatology Unit, Department of Medical, Surgical and Neurological Sciences, University of Siena, 53100 Siena, Italy; (M.D.); (P.R.); (E.C.)
| | - Costantino Ricci
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), S. Orsola-Malpighi University Hospital, University of Bologna, 40126 Bologna, Italy;
| | - Linda Tognetti
- Dermatology Unit, Department of Medical, Surgical and Neurological Sciences, University of Siena, 53100 Siena, Italy; (M.D.); (P.R.); (E.C.)
| | - Anna Elisa Verzì
- Dermatology Clinic, University of Catania, 95131 Catania, Italy; (A.E.V.); (F.L.)
| | - Pietro Rubegni
- Dermatology Unit, Department of Medical, Surgical and Neurological Sciences, University of Siena, 53100 Siena, Italy; (M.D.); (P.R.); (E.C.)
| | - Veronique Del Marmol
- Department of Dermatology, Erasme Hospital, Université Libre de Bruxelles, 1050 Brussels, Belgium; (V.D.M.); (M.S.)
| | - Francesco Lacarrubba
- Dermatology Clinic, University of Catania, 95131 Catania, Italy; (A.E.V.); (F.L.)
| | - Elisa Cinotti
- Dermatology Unit, Department of Medical, Surgical and Neurological Sciences, University of Siena, 53100 Siena, Italy; (M.D.); (P.R.); (E.C.)
| | - Mariano Suppa
- Department of Dermatology, Erasme Hospital, Université Libre de Bruxelles, 1050 Brussels, Belgium; (V.D.M.); (M.S.)
- Groupe d’Imagerie Cutanée Non Invasive (GICNI), Société Française de Dermatologie (SFD), 42055 Paris, France
- Department of Dermatology, Institut Jules Bordet, Université Libre de Bruxelles, 1050 Brussels, Belgium
| | - Ketty Peris
- Dermatologia, Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.P.); (A.D.S.); (G.P.); (L.P.); (K.P.)
- UOC di Dermatologia, Dipartimento di Scienze Mediche e Chirurgiche, Fondazione Policlinico Universitario A. Gemelli—IRCCS, 00168 Rome, Italy
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3
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Qiao N, Dumas V, Bergheau A, Ouillon L, Laroche N, Privet-Thieulin C, Perrot JL, Zahouani H. Contactless mechanical stimulation of the skin using shear waves. J Mech Behav Biomed Mater 2024; 156:106597. [PMID: 38810542 DOI: 10.1016/j.jmbbm.2024.106597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 05/12/2024] [Accepted: 05/23/2024] [Indexed: 05/31/2024]
Abstract
The skin, the outermost organ of the human body, is vital for sensing and responding to stimuli through mechanotransduction. It is constantly exposed to mechanical stress. Consequently, various mechanical therapies, including compression, massage, and microneedling, have become routine practices for skin healing and regeneration. However, these traditional methods require direct skin contact, restricting their applicability. To address this constraint, we developed shear wave stimulation (SWS), a contactless mechanical stimulation technique. The effectiveness of SWS was compared with that of a commercial compression bioreactor used on reconstructed skin at various stages of maturity. Despite the distinct stimulus conditions applied by the two methods, SWS yielded remarkable outcomes, similar to the effects of the compression bioreactor. It significantly increased the shear modulus of tissue-engineered skin, heightened the density of collagen and elastin fibers, and resulted in an augmentation of fibroblasts in terms of their number and length. Notably, SWS exhibited diverse effects in the low- and high-frequency modes, highlighting the importance of fine-tuning the stimulus intensity. These results unequivocally demonstrated the capability of SWS to enhance the mechanical functions of the skin in vitro, making it a promising option for addressing wound healing and stretch mark recovery.
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Affiliation(s)
- Na Qiao
- Univ Lyon, Ecole Centrale de Lyon, CNRS, ENTPE, LTDS, UMR5513, 69130, Ecully, France.
| | - Virginie Dumas
- Univ Lyon, Ecole Centrale de Lyon, CNRS, ENTPE, LTDS, UMR5513, ENISE, 42023, Saint Etienne, France
| | - Alexandre Bergheau
- Univ Lyon, Ecole Centrale de Lyon, CNRS, ENTPE, LTDS, UMR5513, 69130, Ecully, France
| | - Lucas Ouillon
- Univ Lyon, Ecole Centrale de Lyon, CNRS, ENTPE, LTDS, UMR5513, 69130, Ecully, France
| | - Norbert Laroche
- INSERM U1059-SAINBIOSE, University of Lyon, Jean Monnet University, 42270 Saint Priest en Jarez, France
| | | | - Jean-Luc Perrot
- Département de Dermatologie, Centre Hospitalier Universitaire de Saint-Etienne, 42055, Saint-Etienne, France
| | - Hassan Zahouani
- Univ Lyon, Ecole Centrale de Lyon, CNRS, ENTPE, LTDS, UMR5513, 69130, Ecully, France.
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4
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Perrot JL, Cinotti E. High-resolution ultrasound in the current landscape of dermatology imaging. J Eur Acad Dermatol Venereol 2024; 38:1230-1231. [PMID: 38925573 DOI: 10.1111/jdv.20068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Accepted: 04/23/2024] [Indexed: 06/28/2024]
Affiliation(s)
- J L Perrot
- Service de Dermatologie Centre Hospitalier Universitaire de Saint-Etienne, Saint-Priest-en-Jarez, France
- Laboratory of Tribology and System Dynamics (LTDS), UMR 5513 CNRS, ECL-ENISE, Ecole Centrale de Lyon, University of Lyon, Ecully, France
- Groupe D'Imagerie Cutanée Non Invasive de la Societe fRncaise de Dermatologie GCNI, Paris, France
| | - E Cinotti
- Groupe D'Imagerie Cutanée Non Invasive de la Societe fRncaise de Dermatologie GCNI, Paris, France
- Dermatology Unit, Department of Medical, Surgical and Neurosciences, University of Siena, Siena, Italy
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5
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Ammam I, Guillermin A, Ouillon L, Vargiolu R, Perrot JL, Zahouani H. Coupling tensile test with LC-OCT and ultrasound imaging: investigation of the skin sublayers mechanical behaviour. ROYAL SOCIETY OPEN SCIENCE 2024; 11:231712. [PMID: 39100155 PMCID: PMC11296144 DOI: 10.1098/rsos.231712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 03/15/2024] [Accepted: 05/06/2024] [Indexed: 08/06/2024]
Abstract
The skin is an envelope that covers the entire body. Nowadays, understanding and studying the mechanical, biological and sensory properties of the skin is essential, especially in dermatology and cosmetology. The in-depth study of the skin's mechanical behaviour is a highly intriguing challenge, enabling the differentiation of the behaviour of each layer. An extension device was developed to perform relaxation and extension tests to characterize the skin. The device has also been coupled with imaging tools (LC-OCT and ultrasound), allowing us to observe layer-by-layer deformations during the tests. Relaxation tests revealed significant skin anisotropy, as well as an influence of age and gender on skin viscoelastic parameters calculated from relaxation curves and a skin viscoelastic model. These tests also unveiled their ability to distinguish certain characteristic pathologies that alter the mechanical properties of the skin, such as scleroderma or heliodermatitis. Furthermore, the optical-mechanical coupling and deformation calculation through image analysis demonstrated that the skin layers exhibit distinct mechanical behaviours owing to their different structures. Finally, Poisson's ratio of the skin was obtained by calculating the deformation in two directions for each layer.
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Affiliation(s)
- Ianis Ammam
- Université de Lyon, ENISE, LTDS, UMR 5513 CNRS, 58 rue Jean Parot, Saint-Etienne Cedex 242023, France
| | - Amaury Guillermin
- Université de Lyon, ENISE, LTDS, UMR 5513 CNRS, 58 rue Jean Parot, Saint-Etienne Cedex 242023, France
| | - Lucas Ouillon
- Université de Lyon, ENISE, LTDS, UMR 5513 CNRS, 58 rue Jean Parot, Saint-Etienne Cedex 242023, France
| | - Roberto Vargiolu
- Université de Lyon, ENISE, LTDS, UMR 5513 CNRS, 58 rue Jean Parot, Saint-Etienne Cedex 242023, France
| | - Jean-Luc Perrot
- Dermatology Department, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - Hassan Zahouani
- Université de Lyon, ENISE, LTDS, UMR 5513 CNRS, 58 rue Jean Parot, Saint-Etienne Cedex 242023, France
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6
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Barbarossa L, D’Onghia M, Cartocci A, Suppa M, Tognetti L, Cappilli S, Peris K, Perez-Anker J, Malvehy J, Baldino G, Militello C, Perrot JL, Rubegni P, Cinotti E. Understanding the Dermoscopic Patterns of Basal Cell Carcinoma Using Line-Field Confocal Tomography. Tomography 2024; 10:826-838. [PMID: 38921940 PMCID: PMC11209319 DOI: 10.3390/tomography10060063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2024] [Revised: 05/13/2024] [Accepted: 05/20/2024] [Indexed: 06/27/2024] Open
Abstract
Basal cell carcinoma (BCC) is the most frequent malignancy in the general population. To date, dermoscopy is considered a key tool for the diagnosis of BCC; nevertheless, line-field confocal optical coherence tomography (LC-OCT), a new non-invasive optical technique, has become increasingly important in clinical practice, allowing for in vivo imaging at cellular resolution. The present study aimed to investigate the possible correlation between the dermoscopic features of BCC and their LC-OCT counterparts. In total, 100 histopathologically confirmed BCC cases were collected at the Dermatologic Clinic of the University of Siena, Italy. Predefined dermoscopic and LC-OCT criteria were retrospectively evaluated, and their frequencies were calculated. The mean (SD) age of our cohort was 65.46 (13.36) years. Overall, BCC lesions were mainly located on the head (49%), and they were predominantly dermoscopically pigmented (59%). Interestingly, all dermoscopic features considered had a statistically significant agreement with the LC-OCT criteria (all p < 0.05). In conclusion, our results showed that dermoscopic patterns may be associated with LC-OCT findings, potentially increasing accuracy in BCC diagnosis. However, further studies are needed in this field.
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Affiliation(s)
- Lorenzo Barbarossa
- Dermatology Unit, Department of Medical, Surgical and Neurological Sciences, University of Siena, 53100 Siena, Italy (L.T.); (P.R.); (E.C.)
| | - Martina D’Onghia
- Dermatology Unit, Department of Medical, Surgical and Neurological Sciences, University of Siena, 53100 Siena, Italy (L.T.); (P.R.); (E.C.)
| | - Alessandra Cartocci
- Dermatology Unit, Department of Medical, Surgical and Neurological Sciences, University of Siena, 53100 Siena, Italy (L.T.); (P.R.); (E.C.)
| | - Mariano Suppa
- Department of Dermatology, Hôpital Erasme, HUB, Université Libre de Bruxelles, 1070 Brussels, Belgium
| | - Linda Tognetti
- Dermatology Unit, Department of Medical, Surgical and Neurological Sciences, University of Siena, 53100 Siena, Italy (L.T.); (P.R.); (E.C.)
| | - Simone Cappilli
- Department of Dermatology, Sacred Heart Catholic University, 00168 Rome, Italy; (S.C.)
| | - Ketty Peris
- Department of Dermatology, Sacred Heart Catholic University, 00168 Rome, Italy; (S.C.)
| | - Javiera Perez-Anker
- Melanoma Unit, Hospital Clinic Barcelona, University of Barcelona, 08036 Barcelona, Spain
- CIBER de Enfermedades Raras, Instituto de Salud Carlos III, 28029 Barcelona, Spain
| | - Josep Malvehy
- Melanoma Unit, Hospital Clinic Barcelona, University of Barcelona, 08036 Barcelona, Spain
- CIBER de Enfermedades Raras, Instituto de Salud Carlos III, 28029 Barcelona, Spain
| | - Gennaro Baldino
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98122 Messina, Italy
| | - Caterina Militello
- Department of Pathological Anatomy, University of Siena, 53100 Siena, Italy
| | - Jean Luc Perrot
- Department of Dermatology, University Hospital of Saint-Etienne, 42055 Saint-Etienne, France
| | - Pietro Rubegni
- Dermatology Unit, Department of Medical, Surgical and Neurological Sciences, University of Siena, 53100 Siena, Italy (L.T.); (P.R.); (E.C.)
| | - Elisa Cinotti
- Dermatology Unit, Department of Medical, Surgical and Neurological Sciences, University of Siena, 53100 Siena, Italy (L.T.); (P.R.); (E.C.)
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7
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Wu J, Ma Q, Zhou X, Wei Y, Liu Z, Kang H. Segmentation and quantitative analysis of optical coherence tomography (OCT) images of laser burned skin based on deep learning. Biomed Phys Eng Express 2024; 10:045026. [PMID: 38718764 DOI: 10.1088/2057-1976/ad488f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Accepted: 05/08/2024] [Indexed: 05/22/2024]
Abstract
Evaluation of skin recovery is an important step in the treatment of burns. However, conventional methods only observe the surface of the skin and cannot quantify the injury volume. Optical coherence tomography (OCT) is a non-invasive, non-contact, real-time technique. Swept source OCT uses near infrared light and analyzes the intensity of light echo at different depths to generate images from optical interference signals. To quantify the dynamic recovery of skin burns over time, laser induced skin burns in mice were evaluated using deep learning of Swept source OCT images. A laser-induced mouse skin thermal injury model was established in thirty Kunming mice, and OCT images of normal and burned areas of mouse skin were acquired at day 0, day 1, day 3, day 7, and day 14 after laser irradiation. This resulted in 7000 normal and 1400 burn B-scan images which were divided into training, validation, and test sets at 8:1.5:0.5 ratio for the normal data and 8:1:1 for the burn data. Normal images were manually annotated, and the deep learning U-Net model (verified with PSPNe and HRNet models) was used to segment the skin into three layers: the dermal epidermal layer, subcutaneous fat layer, and muscle layer. For the burn images, the models were trained to segment just the damaged area. Three-dimensional reconstruction technology was then used to reconstruct the damaged tissue and calculate the damaged tissue volume. The average IoU value and f-score of the normal tissue layer U-Net segmentation model were 0.876 and 0.934 respectively. The IoU value of the burn area segmentation model reached 0.907 and f-score value reached 0.951. Compared with manual labeling, the U-Net model was faster with higher accuracy for skin stratification. OCT and U-Net segmentation can provide rapid and accurate analysis of tissue changes and clinical guidance in the treatment of burns.
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Affiliation(s)
- Jingyuan Wu
- Beijing Institute of Radiation Medicine, Beijing 100850, People's Republic of China
- College of Life Sciences, Hebei University, Baoding, Hebei 071002, People's Republic of China
| | - Qiong Ma
- Beijing Institute of Radiation Medicine, Beijing 100850, People's Republic of China
| | - Xun Zhou
- Beijing Institute of Radiation Medicine, Beijing 100850, People's Republic of China
| | - Yu Wei
- Beijing Institute of Radiation Medicine, Beijing 100850, People's Republic of China
- College of Life Sciences, Hebei University, Baoding, Hebei 071002, People's Republic of China
| | - Zhibo Liu
- Beijing Institute of Radiation Medicine, Beijing 100850, People's Republic of China
| | - Hongxiang Kang
- Beijing Institute of Radiation Medicine, Beijing 100850, People's Republic of China
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8
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Thamm JR, Welzel J, Schuh S. AI-based and LC-OCT-guided follow-up of actinic keratoses under treatment with tirbanibulin 1. J Eur Acad Dermatol Venereol 2024. [PMID: 38702995 DOI: 10.1111/jdv.20059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 04/16/2024] [Indexed: 05/06/2024]
Affiliation(s)
- Janis Raphael Thamm
- Department of Dermatology and Allergology, University Hospital Augsburg, Augsburg, Germany
| | - Julia Welzel
- Department of Dermatology and Allergology, University Hospital Augsburg, Augsburg, Germany
| | - Sandra Schuh
- Department of Dermatology and Allergology, University Hospital Augsburg, Augsburg, Germany
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9
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Thamm JR, Welzel J, Schuh S. Diagnosis and therapy of actinic keratosis. J Dtsch Dermatol Ges 2024; 22:675-690. [PMID: 38456369 DOI: 10.1111/ddg.15288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 09/28/2023] [Indexed: 03/09/2024]
Abstract
Actinic keratosis (AK) is considered a chronic and recurring in situ skin neoplasia, with a possible transformation into invasive squamous cell carcinoma (SCC). Among others, predominant risk factors for development of AK are UV-light exposure and immunosuppression. Basal epidermal keratinocyte atypia (AK I) and proliferation (PRO score) seem to drive malignant transformation, rather than clinical appearance of AK (Olsen I-III). Due to the invasiveness of punch biopsy, those histological criteria are not regularly assessed. Non-invasive imaging techniques, such as optical coherence tomography (OCT), reflectance confocal microscopy (RCM) and line-field confocal OCT (LC-OCT) are helpful to distinguish complex cases of AK, Bowen's disease, and SCC. Moreover, LC-OCT can visualize the epidermis and the papillary dermis at cellular resolution, allowing real-time PRO score assessment. The decision-making for implementation of therapy is still based on clinical risk factors, ranging from lesion- to field-targeted and ablative to non-ablative regimens, but in approximately 85% of the cases a recurrence of AK can be observed after a 1-year follow-up. The possible beneficial use of imaging techniques for a non-invasive follow-up of AK to detect recurrence or invasive progression early on should be subject to critical evaluation in further studies.
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Affiliation(s)
- Janis Raphael Thamm
- Department of Dermatology and Allergology, University Hospital Augsburg, Augsburg, Germany
| | - Julia Welzel
- Department of Dermatology and Allergology, University Hospital Augsburg, Augsburg, Germany
| | - Sandra Schuh
- Department of Dermatology and Allergology, University Hospital Augsburg, Augsburg, Germany
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10
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Thamm JR, Welzel J, Schuh S. Diagnose und Therapie aktinischer Keratosen. J Dtsch Dermatol Ges 2024; 22:675-691. [PMID: 38730534 DOI: 10.1111/ddg.15288_g] [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: 01/31/2023] [Accepted: 09/28/2023] [Indexed: 05/13/2024]
Abstract
Actinic keratosis (AK) is considered a chronic and recurring in situ skin neoplasia, with a possible transformation into invasive squamous cell carcinoma (SCC). Among others, predominant risk factors for development of AK are UV-light exposure and immunosuppression. Basal epidermal keratinocyte atypia (AK I) and proliferation (PRO Score) seem to drive malignant turnover, rather than clinical appearance of AK (Olsen I-III). Due to the invasiveness of punch biopsy, those histological criteria are not regularly assessed. Non-invasive imaging techniques, such as optical coherence tomography (OCT), reflectance confocal microscopy (RCM) and line-field confocal OCT (LC-OCT) are helpful to distinguish complex cases of AK, Bowen's disease and SCC. Moreover, LC-OCT can visualize the epidermis and the papillary dermis at cellular resolution, allowing real-time PRO Score assessment. The decision-making for implementation of therapy is still based on clinical risk factors, ranging from lesion- to field-targeted and ablative to non-ablative regimes, but in approximately 85% of the cases a recurrence of AK can be observed after a 1-year follow-up. The possible beneficial use of imaging techniques for a non-invasive follow-up of AK to detect recurrence or invasive progression early on should be subject to critical evaluation in further studies.
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Affiliation(s)
| | - Julia Welzel
- Klinik für Dermatologie und Allergologie, Universitätsklinikum Augsburg
| | - Sandra Schuh
- Klinik für Dermatologie und Allergologie, Universitätsklinikum Augsburg
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11
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Russo F, Lazzeri L, Falcinelli F. Reading Patch Test Through Line-Field Confocal Optical Coherence Tomography Eyes. Dermatitis 2024; 35:118-120. [PMID: 37934230 DOI: 10.1089/derm.2023.0117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Affiliation(s)
- Filomena Russo
- From the Department of Dermatology, IDI-IRCCS, Dermatological Research Hospital, Rome, Italy
| | - Laura Lazzeri
- Department of Medical, Surgical and Neurological Science, Dermatology Section, University of Siena, S. Maria alle Scotte Hospital, Siena, Italy
| | - Francesca Falcinelli
- Department of Medical, Surgical and Neurological Science, Dermatology Section, University of Siena, S. Maria alle Scotte Hospital, Siena, Italy
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12
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Jdid R, Pedrazzani M, Lejeune F, Fischman S, Cazorla G, Forestier S, Khalifa YB. Skin dark spot mapping and evaluation of brightening product efficacy using Line-field Confocal Optical Coherence Tomography (LC-OCT). Skin Res Technol 2024; 30:e13623. [PMID: 38385854 PMCID: PMC10883256 DOI: 10.1111/srt.13623] [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: 01/15/2024] [Accepted: 02/05/2024] [Indexed: 02/23/2024]
Abstract
BACKGROUND Facial dark spots remain a significant challenge for the cosmetic industry, in terms of providing effective treatment. Using Line-field Confocal Optical Coherence Tomography (LC-OCT), we investigated the internal structural features of photo-aging spot areas and evaluated the efficacy of a skin-brightening cosmetic product. MATERIALS AND METHODS Twenty-six Asian female volunteers, aged between 29 and 65 years, applied a cosmetic product on their entire face twice a day for 2 months. LC-OCT was used to evaluate the dermal-epidermal junction (DEJ) undulation and the volume density of melanin in the epidermis at D0 and D56. Skin brightening and redness were also assessed by photography (SkinCam). RESULTS Using LC-OCT technology, various microscopic dark spot morphologies, spanning from minimally deformed DEJ to complex DEJ patterns, were identified. Dark spots characterized by slight deformities in the DEJ were predominantly observed in the youngest age group, while older volunteers displayed a wavier pattern. Furthermore, a total of 44 spots were monitored to evaluate the brightening product efficacy. A statistically significant reduction in melanin volumetric density of 7.3% in the spots and 12.3% in their surrounding area was observed after 56 days of product application. In line with these results, an analysis of color parameters using SkinCam reveals a significant increase in brightening and decrease in redness in both pigmented spots and the surrounding skin following application. CONCLUSIONS LC-OCT proves to be a valuable tool for in-depth dark spots characterization and assessment of skin brightening products, enabling various applications in the field of dermatological sciences.
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Affiliation(s)
- Randa Jdid
- Chanel Parfums BeautéInnovation Recherche et DéveloppementPantinFrance
| | | | - François Lejeune
- Chanel Parfums BeautéInnovation Recherche et DéveloppementPantinFrance
| | | | - Gabriel Cazorla
- Chanel Parfums BeautéInnovation Recherche et DéveloppementPantinFrance
| | - Sandra Forestier
- Chanel Parfums BeautéInnovation Recherche et DéveloppementPantinFrance
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Orsini C, Trovato E, Cortonesi G, Pedrazzani M, Suppa M, Rubegni P, Tognetti L, Cinotti E. Line-field confocal optical coherence tomography: New insights for psoriasis treatment monitoring. J Eur Acad Dermatol Venereol 2024; 38:325-331. [PMID: 37823360 DOI: 10.1111/jdv.19568] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 08/31/2023] [Indexed: 10/13/2023]
Abstract
BACKGROUND Line-field confocal optical coherence tomography (LC-OCT) is a new, valid means for a rapid and non-invasive in vivo examination of the epidermis and upper dermis, allowing digital interpretation and measurement of high-resolution images on a cellular level. Given these properties, it may represent a valid tool for monitoring psoriasis during treatment, allowing a new method to set a precise objective severity of the disease. OBJECTIVES We aimed to investigate the potentialities of LC-OCT in the non-invasive monitoring of microscopical changes associated with moderate-severe plaque psoriasis (PP) during the treatment with the most common biological drugs. MATERIALS AND METHODS We performed LC-OCT imaging of PP lesions from 17 patients before and after 8 weeks of treatment. The clinical severity of the single lesions was evaluated using a lesion score (LS), designed considering three parameters: erythema, desquamation and infiltration. LC-OCT images were segmented by artificial intelligence and evaluated based on three microscopic criteria: the thickness of the stratum corneum, the thickness of the living epidermis and the undulation of the dermo-epidermal junction. RESULTS Line-field confocal optical coherence tomography digital analysis allowed recognition and quantification of the three microscopic criteria, showing a reduction of all these during the follow-up. Furthermore, a high correlation between change in LS and the thickness of the stratum corneum and the thickness of the living epidermis was found. CONCLUSION Line-field confocal optical coherence tomography can non-invasively monitor the response of PP to different treatments. Morphometric changes occurring in the psoriatic lesion during the 8-week treatment period were identified by in vivo LC-OCT and measured by using artificial intelligence. Although future studies are required, based on these preliminary results, LC-OCT may represent a valid potential tool for precise monitoring of therapeutic response.
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Affiliation(s)
- C Orsini
- Dermatology Unit, Department of Medical, Surgical and Neurosciences, University of Siena, Siena, Italy
| | - E Trovato
- Dermatology Unit, Department of Medical, Surgical and Neurosciences, University of Siena, Siena, Italy
| | - G Cortonesi
- Dermatology Unit, Department of Medical, Surgical and Neurosciences, University of Siena, Siena, Italy
| | | | - M Suppa
- Department of Dermatology, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
| | - P Rubegni
- Dermatology Unit, Department of Medical, Surgical and Neurosciences, University of Siena, Siena, Italy
| | - L Tognetti
- Dermatology Unit, Department of Medical, Surgical and Neurosciences, University of Siena, Siena, Italy
| | - E Cinotti
- Dermatology Unit, Department of Medical, Surgical and Neurosciences, University of Siena, Siena, Italy
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14
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Olesen UH, Foged C, Jacobsen K, Ortner VK, Fredman G, Paasch U, Haedersdal M. Line-field confocal optical coherence tomography for in vivo visualization of morphological characteristics of squamous cell carcinoma in a murine model. Lasers Surg Med 2024; 56:14-18. [PMID: 38129971 DOI: 10.1002/lsm.23750] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 12/05/2023] [Accepted: 12/07/2023] [Indexed: 12/23/2023]
Abstract
OBJECTIVES Non-invasive imaging with line-field confocal optical coherence tomography (LC-OCT) can support the diagnosis of squamous cell carcinoma (SCC) through visualization of morphological characteristics specific to skin cancer. We aimed to visualize prominent morphological characteristics of SCC using LC-OCT in a well-established murine SCC model. MATERIALS AND METHODS Nine hairless mice were exposed to ultraviolet radiation three times weekly for 9 months to induce SCC development. Visible SCC tumors (n = 9) were imaged with LC-OCT and the presence of 10 well-described morphological characteristics of SCC were evaluated in the scans by two physicians with adjudication by a third. RESULTS Overall, murine morphological characteristics resembled corresponding features previously reported in human SCCs. Interrupted dermal-epidermal junction occurred in 100% of tumors. In epidermis, the most frequently observed characteristics were severe epidermal dysplasia (100%) and tumor budding (89%). Common dermal characteristics included broad strands (100%) and collagen alterations (78%). CONCLUSION LC-OCT imaging can be used to non-invasively visualize morphological characteristics specific to SCC in an in vivo preclinical model.
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Affiliation(s)
- Uffe H Olesen
- Department of Dermatology, Copenhagen University Hospital Bispebjerg, Copenhagen, Denmark
| | - Camilla Foged
- Department of Dermatology, Copenhagen University Hospital Bispebjerg, Copenhagen, Denmark
| | - Kevin Jacobsen
- Department of Dermatology, Copenhagen University Hospital Bispebjerg, Copenhagen, Denmark
| | - Vinzent K Ortner
- Department of Dermatology, Copenhagen University Hospital Bispebjerg, Copenhagen, Denmark
| | - Gabriella Fredman
- Department of Dermatology, Copenhagen University Hospital Bispebjerg, Copenhagen, Denmark
| | - Uwe Paasch
- Department of Dermatology, Venereology and Allergy, University of Leipzig, Leipzig, Germany
| | - Merete Haedersdal
- Department of Dermatology, Copenhagen University Hospital Bispebjerg, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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15
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Kurzeja M, Warszawik-Hendzel O, Rakowska A, Graczyk A, Fedorczuk D, Czuwara J, Olszewska M, Rudnicka L. Line-field confocal optical coherence tomography: A new diagnostic method of lichen planopilaris. Skin Res Technol 2023; 29:e13495. [PMID: 37881054 PMCID: PMC10576171 DOI: 10.1111/srt.13495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 09/24/2023] [Accepted: 09/27/2023] [Indexed: 10/27/2023]
Affiliation(s)
- Marta Kurzeja
- Department of Dermatology, Medical University of Poland, Warsaw, Poland
| | | | - Adriana Rakowska
- Department of Dermatology, Medical University of Poland, Warsaw, Poland
| | - Alina Graczyk
- Department of Dermatology, Medical University of Poland, Warsaw, Poland
| | - Danuta Fedorczuk
- Department of Dermatology, Medical University of Poland, Warsaw, Poland
| | - Joanna Czuwara
- Department of Dermatology, Medical University of Poland, Warsaw, Poland
| | | | - Lidia Rudnicka
- Department of Dermatology, Medical University of Poland, Warsaw, Poland
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16
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Bonnier F, Pedrazzani M, Fischman S, Viel T, Lavoix A, Pegoud D, Nili M, Jimenez Y, Ralambondrainy S, Cauchard JH, Korichi R. Line-field confocal optical coherence tomography coupled with artificial intelligence algorithms to identify quantitative biomarkers of facial skin ageing. Sci Rep 2023; 13:13881. [PMID: 37620374 PMCID: PMC10449778 DOI: 10.1038/s41598-023-40340-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 08/09/2023] [Indexed: 08/26/2023] Open
Abstract
Quantitative biomarkers of facial skin ageing were studied from one hundred healthy Caucasian female volunteers, aged 20-70 years, using in vivo 3D Line-field Confocal Optical Coherence Tomography (LC-OCT) imaging coupled with Artificial Intelligence (AI)-based quantification algorithms. Layer metrics, i.e. stratum corneum thickness (SC), viable epidermal thickness and Dermal-Epidermal Junction (DEJ) undulation, as well as cellular metrics were measured for the temple, cheekbone and mandible. For all three investigated facial areas, minimal age-related variations were observed in the thickness of the SC and viable epidermis layers. A flatter and more homogeneous epidermis (decrease in the standard deviation of the number of layers means), a less dense cellular network with fewer cells per layer (decrease in cell surface density), and larger and more heterogeneous nuclei within each layer (increase in nuclei volume and their standard deviation) were found with significant variations with age. The higher atypia scores further reflected the heterogeneity of nuclei throughout the viable epidermis. The 3D visualisation of fine structures in the skin at the micrometric resolution and the 1200 µm × 500 µm field of view achieved with LC-OCT imaging enabled to compute relevant quantitative biomarkers for a better understanding of skin biology and the ageing process in vivo.
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Affiliation(s)
- Franck Bonnier
- LVMH Recherche, 185 Avenue de Verdun, 45804, Saint Jean de Braye, France.
| | | | | | - Théo Viel
- DAMAE Medical, 14 Rue Sthrau, 75013, Paris, France
| | - Agnes Lavoix
- DERMATECH, 8 Rue Jacqueline Auriol, 69008, Lyon, France
| | - Didier Pegoud
- DERMATECH, 8 Rue Jacqueline Auriol, 69008, Lyon, France
| | - Meryem Nili
- DERMATECH, 8 Rue Jacqueline Auriol, 69008, Lyon, France
| | | | | | | | - Rodolphe Korichi
- LVMH Recherche, 185 Avenue de Verdun, 45804, Saint Jean de Braye, France
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17
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Ogien J, Tavernier C, Fischman S, Dubois A. Line-field confocal optical coherence tomography (LC-OCT): principles and practical use. Ital J Dermatol Venerol 2023; 158:171-179. [PMID: 37278495 DOI: 10.23736/s2784-8671.23.07613-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Line-field confocal optical coherence tomography (LC-OCT) is a non-invasive optical imaging technique based on a combination of the optical principles of optical coherence tomography and reflectance confocal microscopy with line-field illumination, which can generate cell-resolved images of the skin, in vivo, in vertical section, horizontal section and in three dimensions. This article reviews the optical principles of LC-OCT, including low coherence interferometry, confocal filtering and line-field arrangement. The optical setup allowing for the acquisition of color images of the skin surface in parallel with LC-OCT images, without compromising LC-OCT performance, is also presented. Practical use of LC-OCT is demonstrated through an overview of the workflow of examining a patient using a commercial handheld LC-OCT probe (deepLive™, DAMAE Medical), from creating the patient record in the software, acquiring the images, to reviewing and interpreting the images. LC-OCT can generate a significant amount of data, making automated deep learning algorithms particularly relevant for assisting in the analysis of LC-OCT images. A review of algorithms developed for skin layer segmentation, keratinocyte nuclei segmentation, and automatic detection of atypical keratinocyte nuclei is provided.
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Affiliation(s)
| | | | | | - Arnaud Dubois
- DAMAE Medical, Paris, France
- Laboratoire Charles Fabry, Institut d'Optique Graduate School, Paris-Saclay University, Palaiseau, France
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18
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Schneller A, Sitaru S, Biedermann T, Zink A. [The third dimension: opportunities for 3D technologies in dermatology]. DERMATOLOGIE (HEIDELBERG, GERMANY) 2023; 74:379-381. [PMID: 37103552 DOI: 10.1007/s00105-023-05139-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Accepted: 03/07/2023] [Indexed: 04/28/2023]
Affiliation(s)
- Alexander Schneller
- Klinik und Poliklinik für Dermatologie und Allergologie am Biederstein, Klinikum rechts der Isar, Technische Universität München, München, Deutschland.
- Sektion Kinderherzchirurgie, Klinik für Herzchirurgie, Universitätsklinikum Heidelberg, Heidelberg, Deutschland.
| | - Sebastian Sitaru
- Klinik und Poliklinik für Dermatologie und Allergologie am Biederstein, Klinikum rechts der Isar, Technische Universität München, München, Deutschland
| | - Tilo Biedermann
- Klinik und Poliklinik für Dermatologie und Allergologie am Biederstein, Klinikum rechts der Isar, Technische Universität München, München, Deutschland
| | - Alexander Zink
- Klinik und Poliklinik für Dermatologie und Allergologie am Biederstein, Klinikum rechts der Isar, Technische Universität München, München, Deutschland
- Division of Dermatology and Venereology, Department of Medicine Solna, Karolinska Institutet, Stockholm, Schweden
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19
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Breugnot J, Rouaud‐Tinguely P, Gilardeau S, Rondeau D, Bordes S, Aymard E, Closs B. Utilizing deep learning for dermal matrix quality assessment on in vivo line-field confocal optical coherence tomography images. Skin Res Technol 2023; 29:e13221. [PMID: 36366860 PMCID: PMC9838780 DOI: 10.1111/srt.13221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 10/08/2022] [Indexed: 11/13/2022]
Abstract
BACKGROUND Line-field confocal optical coherence tomography (LC-OCT) is an imaging technique providing non-invasive "optical biopsies" with an isotropic spatial resolution of ∼1 μm and deep penetration until the dermis. Analysis of obtained images is classically performed by experts, thus requiring long and fastidious training and giving operator-dependent results. In this study, the objective was to develop a new automated method to score the quality of the dermal matrix precisely, quickly, and directly from in vivo LC-OCT images. Once validated, this new automated method was applied to assess photo-aging-related changes in the quality of the dermal matrix. MATERIALS AND METHODS LC-OCT measurements were conducted on the face of 57 healthy Caucasian volunteers. The quality of the dermal matrix was scored by experts trained to evaluate the fibers' state according to four grades. In parallel, these images were used to develop the deep learning model by adapting a MobileNetv3-Small architecture. Once validated, this model was applied to the study of dermal matrix changes on a panel of 36 healthy Caucasian females, divided into three groups according to their age and photo-exposition. RESULTS The deep learning model was trained and tested on a set of 15 993 images. Calculated on the test data set, the accuracy score was 0.83. As expected, when applied to different volunteer groups, the model shows greater and deeper alteration of the dermal matrix for old and photoexposed subjects. CONCLUSIONS In conclusion, we have developed a new method that automatically scores the quality of the dermal matrix on in vivo LC-OCT images. This accurate model could be used for further investigations, both in the dermatological and cosmetic fields.
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20
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Pena AM, Baldeweck T, Decencière E, Koudoro S, Victorin S, Raynaud E, Ngo B, Bastien P, Brizion S, Tancrède-Bohin E. In vivo multiphoton multiparametric 3D quantification of human skin aging on forearm and face. Sci Rep 2022; 12:14863. [PMID: 36050338 PMCID: PMC9437074 DOI: 10.1038/s41598-022-18657-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 08/17/2022] [Indexed: 11/16/2022] Open
Abstract
Quantifying skin aging changes and characterizing its 3D structure and function in a non-invasive way is still a challenging area of research, constantly evolving with the development of imaging methods and image analysis tools. In vivo multiphoton imaging offers means to assess skin constituents in 3D, however prior skin aging studies mostly focused on 2D analyses of dermal fibers through their signals’ intensities or densities. In this work, we designed and implemented multiphoton multiparametric 3D quantification tools for in vivo human skin pigmentation and aging characterization. We first demonstrated that despite the limited field of view of the technic, investigation of 2 regions of interest (ROIs) per zone per volunteer is a good compromise in assessing 3D skin constituents in both epidermis and superficial dermis. We then characterized skin aging on different UV exposed areas—ventral and dorsal forearms, face. The three major facts of aging that are epidermal atrophy, the dermal–epidermal junction (DEJ) flattening and dermal elastosis can be non-invasively quantified and compared. Epidermal morphological changes occur late and were only objectified between extreme age groups. Melanin accumulation in suprabasal layers with age and chronic exposure on ventral and dorsal forearms is less known and appears earlier. Superficial dermal aging changes are mainly elastin density increase, with no obvious change in collagen density, reflected by SHGto2PEF ratio and SAAID index decrease and ImbrN index increase on all skin areas. Analysis of the z-dermal distribution of these parameters highlighted the 2nd 20 µm thickness normalized dermal sub-layer, that follows the DEJ shape, as exhibiting the highest aging differences. Moreover, the 3D ImbrN index allows refining the share of photoaging in global aging on face and the 3D SAAID index on forearm, which elastin or fibrillar collagens densities alone do not allow. Photoaging of the temple area evolves as a function of chronic exposure with a more pronounced increase in elastin density, also structurally modified from thin and straight elastic fibers in young volunteers to dense and compact pattern in older ones. More generally, multiphoton multiparametric 3D skin quantification offers rich spatial information of interest in assessing normal human skin condition and its pathological, external environment or product induced changes.
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Affiliation(s)
- Ana-Maria Pena
- L'Oréal Research and Innovation, 1 Avenue Eugène Schueller, BP22, 93601, Aulnay-sous-Bois, France.
| | - Thérèse Baldeweck
- L'Oréal Research and Innovation, 1 Avenue Eugène Schueller, BP22, 93601, Aulnay-sous-Bois, France
| | | | - Serge Koudoro
- MINES ParisTech-PSL Research University, Fontainebleau, France
| | - Steeve Victorin
- L'Oréal Research and Innovation, 1 Avenue Eugène Schueller, BP22, 93601, Aulnay-sous-Bois, France
| | - Edouard Raynaud
- L'Oréal Research and Innovation, 1 Avenue Eugène Schueller, BP22, 93601, Aulnay-sous-Bois, France
| | - Blandine Ngo
- L'Oréal Research and Innovation, 1 Avenue Eugène Schueller, BP22, 93601, Aulnay-sous-Bois, France
| | - Philippe Bastien
- L'Oréal Research and Innovation, 1 Avenue Eugène Schueller, BP22, 93601, Aulnay-sous-Bois, France
| | - Sébastien Brizion
- L'Oréal Research and Innovation, 1 Avenue Eugène Schueller, BP22, 93601, Aulnay-sous-Bois, France
| | - Emmanuelle Tancrède-Bohin
- L'Oréal Research and Innovation, Campus Charles Zviak RIO, 9 rue Pierre Dreyfus, Clichy, France. .,Service de Dermatologie, Hôpital Saint-Louis, Paris, France.
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21
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Waszczuk L, Ogien J, Perrot JL, Dubois A. Co-localized line-field confocal optical coherence tomography and confocal Raman microspectroscopy for three-dimensional high-resolution morphological and molecular characterization of skin tissues ex vivo. BIOMEDICAL OPTICS EXPRESS 2022; 13:2467-2487. [PMID: 35519243 PMCID: PMC9045904 DOI: 10.1364/boe.450993] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 02/22/2022] [Accepted: 03/02/2022] [Indexed: 05/25/2023]
Abstract
Line-field confocal optical coherence tomography (LC-OCT) is an optical modality that provides three-dimensional (3D) images of the skin at cellular resolution. Confocal Raman microspectroscopy (CRM) is a label-free optical technique that can provide point measurement of the molecular content of the skin. This work presents a method to co-localize LC-OCT and CRM acquisitions for morpho-molecular analysis of ex vivo skin tissues at cellular level. The co-localization method allows acquisition of Raman spectra at specific locations in a sample identified from a 3D LC-OCT image, with an accuracy of ± 20 µm. The method was applied to the characterization of tattooed skin biopsies with adverse tattoo reactions. LC-OCT images allowed to target specific regions in the biopsies where the presence of tattoo ink was revealed by detection of the Raman signature of ink pigments. Micrometer-sized foreign bodies of various materials as well as inflammatory cells were also identified within the biopsies. From these results, we demonstrate the value of the LC-OCT-CRM co-localization method and its potential for future ex vivo analysis of suspicious skin lesions.
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Affiliation(s)
- Léna Waszczuk
- Université Paris-Saclay, Institut d’Optique Graduate School, CNRS, Laboratoire Charles Fabry, Palaiseau 91127, France
- DAMAE Medical, Paris 75013, France
| | | | - Jean-Luc Perrot
- University Hospital of Saint-Etienne, Department of Dermatology, 42055 Saint-Etienne, France
| | - Arnaud Dubois
- Université Paris-Saclay, Institut d’Optique Graduate School, CNRS, Laboratoire Charles Fabry, Palaiseau 91127, France
- DAMAE Medical, Paris 75013, France
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