Development of a computer vision binocular system for non-contact small animal model skin cancer tumour imaging

Gorpas, DS; Politopoulos, K; Yova, D

dc.contributor.author	Gorpas, DS	en
dc.contributor.author	Politopoulos, K	en
dc.contributor.author	Yova, D	en
dc.date.accessioned	2014-03-01T02:51:04Z
dc.date.available	2014-03-01T02:51:04Z
dc.date.issued	2007	en
dc.identifier.issn	16057422	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35343
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-36249013681&partnerID=40&md5=c0113885a1dd4de3aa8762aca73698c2	en
dc.subject	Matching problem	en
dc.subject	Non-melanoma skin cancer tumour	en
dc.subject	PDT assessment	en
dc.subject	Photogrammetry	en
dc.subject	Telecentric lenses	en
dc.subject.other	Computer vision	en
dc.subject.other	Image resolution	en
dc.subject.other	Medical imaging	en
dc.subject.other	Photogrammetry	en
dc.subject.other	Skin	en
dc.subject.other	Tumors	en
dc.subject.other	Matching problems	en
dc.subject.other	Non-melanoma skin cancer tumor	en
dc.subject.other	PDT assessment	en
dc.subject.other	Telecentric lenses	en
dc.subject.other	Binocular vision	en
dc.title	Development of a computer vision binocular system for non-contact small animal model skin cancer tumour imaging	en
heal.type	conferenceItem	en
heal.identifier.secondary	66291J	en
heal.publicationDate	2007	en
heal.abstract	This paper describes the development of a novel gauging computer vision system for murine non-melanoma skin cancer tumours volume imaging. The system utilized binocular stereovision, enhanced through the use of telecentric lenses. These lenses optically compromised for the distortion factors and provided orthographic projection, leading to parallax free image acquisition. In order to improve the resolution of the system, a structured light projector, with 450 nm dominant wavelength, was used to illuminate the target with a custom pattern. Robust image processing algorithms granted accurate segmentation, feature recognition, labeling and correlation between the stereo pairs. Under these premises, the well-known ""matching"" problem was resolved successfully and geometrical interpolation provided an accurate three-dimensional reconstruction of the tumour volume. Through back-projection of the calibration object the resolution of the system was calculated up to 0.04 mm. The system was applied to measure the induced geometrical alterations of the tumour after PDT by using the Fosgel photosensitizer, excited by a laser diode emitting at 652 nm. The measurement of the volume induced alterations after each PDT treatment and up to the final tumour shrinkage is critical, to compare PDT efficacy between different protocols. © 2007 SPIE-OSA.	en
heal.journalName	Progress in Biomedical Optics and Imaging - Proceedings of SPIE	en
dc.identifier.volume	6629	en