INVITED SPEAKERS ABSTRACTS
Three dimensional imaging of melanocytic lesions with a novel digital apparatus and with the use of laser
In the present study, two methods have been employed:
© 2010 Lippincott Williams & Wilkins, Inc.
- (1) Imaging of the melanocytic lesions is performed in-vivo with the use of an original stereoscopic imaging device. It consists of a projector and a trinocular imaging system, in which the trinocular device images the lesion as illuminated by the projector. The imaging system consists of 3 high resolution cameras in linear arrangement with the capability of adding more cameras. The projector illuminates the lesion with a textural pattern that is focused on its surface. The acquired images are stereoscopically processed to obtain a metric and photorealistic 3-D- reconstruction of the lesion. Custom-developed software enables the visualization and inspection of the photorealistic 3-d reconstruction, as well as the performance of metric measurements on its surface and volume. Its purpose is to facilitate the analysis and comparison of sequential images of melanocytic lesions from different patients. Examples of three melanomas are shown.
- (2) The new system for optical biopsy is based on non contact tomographic principles. It consists of a laser scanning device, a CCD camera and a rotating sample holder (ex-vivo). The system is described in detail. Analysis is performed with an in house developed software based on the inverse Radon transform. The results are obtained in the form of 3-d images. Examples of two melanomas and an atypical nevus are given.