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Michael BENZAQUEN's informes (23)

Self-injection of a solution intended for topical use containing hyaluronic acid and vitamin B5.

Dec, 2019

Dermal fillers, like hyaluronic Acid (HA) injections for rejuvenation and filling of the periorbital hollows are becoming more and more popular due to their good results and their rare side effects. Initially rare, self-injections have now become common place on the social networks. leer más

Clinical and experimental dermatology

Combined treatment of hypertrophic and keloid scars with intralesional injection of corticosteroids and laser-assisted corticosteroid delivery.

11, 2019

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Dermatologic therapy

Development and accuracy of an artificial intelligence algorithm for acne grading from smartphone photographs.

Nov, 2019

We developed an artificial intelligence algorithm (AIA) for smartphones to determine the severity of facial acne using the GEA scale and to identify different types of acne lesion (comedonal, inflammatory) and postinflammatory hyperpigmentation (PIHP) or residual hyperpigmentation. Overall, 5972 images (face, right and left profiles) obtained with smartphones (IOS and/or Android) from 1072 acne patients were collected. Three trained dermatologists assessed the acne severity for each patient. One acne severity grade per patient (grade given by the majority of the three dermatologists from the two sets of three images) was used to train the algorithm. Acne lesion identification was performed from a subgroup of 348 images using a tagging tool; tagged images served to train the algorithm. The algorithm evolved and was adjusted for sensibility, specificity and correlation using new images. The correlation between the GEA grade and the quantification and qualification of acne lesions both by the AIA and the experts for each image were evaluated for all AIA versions. At final version 6, the GEA grading provided by AIA reached 68% and was similar to that provided by the dermatologists. Between version 4 and version 6, AIA improved precision results multiplied by 1.5 for inflammatory lesions, 2.5 for non-inflammatory lesions and by 2 for PIHP; recall was improved by 2.6, 1.6 and 2.7. The weighted average of precision and recall or F1 score was 84% for inflammatory lesions, 61% for non-inflammatory lesions and 72% for PIHP. leer más

Experimental dermatology
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