Line-field confocal optical coherence tomography for high-resolution noninvasive imaging of skin tumors

Abstract : An optical technique called line-field confocal optical coherence tomography (LC-OCT) is introduced for high-resolution, noninvasive imaging of human skin in vivo. LC-OCT combines the principles of time-domain optical coherence tomography and confocal microscopy with line illumination and detection using a broadband laser and a line-scan camera. LC-OCT measures the echo-time delay and amplitude of light backscattered from cutaneous microstructures through low-coherence interferometry associated with confocal spatial filtering. Multiple A-scans are acquired simultaneously while dynamically adjusting the focus. The resulting cross-sectional B-scan image is produced in real time at 10 frame∕s. With an isotropic spatial resolution of ∼1 μm, the LC-OCT images reveal a comprehensive structural mapping of skin at the cellular level down to a depth of ∼500 μm. LC-OCT has been applied to the imaging of various skin lesions, in vivo, including carcinomas and melanomas. LC-OCT images are found to strongly correlate with conventional histopathological images. The use of LC-OCT as an adjunct tool in medical practice could significantly improve clinical diagnostic accuracy while reducing the number of biopsies of benign lesions.
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Journal of Biomedical Optics, Society of Photo-optical Instrumentation Engineers, 2018, 23
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Contributeur : Arnaud Dubois <>
Soumis le : mardi 6 novembre 2018 - 15:30:59
Dernière modification le : vendredi 16 novembre 2018 - 01:13:12

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  • HAL Id : hal-01913796, version 1

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Arnaud Dubois, Olivier Levecq, Hicham Azimani, David Siret, Anaïs Barut, et al.. Line-field confocal optical coherence tomography for high-resolution noninvasive imaging of skin tumors. Journal of Biomedical Optics, Society of Photo-optical Instrumentation Engineers, 2018, 23. 〈hal-01913796〉

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