Title: A lock-in thermal imaging setup for dermatological applications
Authors : Bonmarin, Mathias
Le Gal, Frédérique-Anne
Published in : Skin Research and Technology
Volume(Issue) : 21
Issue : 3
Pages : 284
Pages to: 290
Publisher / Ed. Institution : Wiley
Issue Date: 2015
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : Bioheat; Lock-in thermal imaging; Medical diagnostic; Perfusion measurements; Thermography; Computer-assisted diagnosis; Equipment design; Equipment failure analysis; Humans; Reproducibility of results; Sensitivity and specificity; Vascular skin diseases; Telangiectasis; Thermography; Skin temperature
Subject (DDC) : 616: Internal medicine and diseases
Abstract: Background Lock‐in thermal imaging is a thermographic method that is widely used in the nondestructive testing of materials. The technique allows detecting under the sample surface, small variations of the thermophysical properties in a noninvasive and noncontact manner. Surprisingly, this method has, to our knowledge, never been used in dermatology although it is particularly suited. Methods We present in this article the first lock‐in thermal imaging setup dedicated to dermatological applications. The apparatus uses a temperature‐modulated airflow to periodically stimulate the skin surface. The infrared images recorded by a high sensitive camera are demodulated according to the digital lock‐in principle to compute a phase and amplitude image. Results First results obtained on benign skin lesions are presented. The images allow to detect small variations of the tissue thermophysical properties like for example, perfusion variations. Lock‐in thermal imaging has the ability to reject disturbing thermal signals coming from subcutaneous tissues. The localization of the lesions is more accurate due the suppression of the lateral heat spreading. Conclusion Lock‐in thermal imaging is a promising method for the detection of lesions exhibiting modified thermophysical properties compared to the surrounding healthy skin.
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Publication type: Article in scientific Journal
DOI : 10.1111/srt.12189
ISSN: 0909752X
1600-0846
URI: https://digitalcollection.zhaw.ch/handle/11475/5013
Appears in Collections:Publikationen School of Engineering

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