Abstract
During endoscopy of the esophagus fluorescence images were recorded at a delay of 20 ns after pulsed laser excitation simultaneously with conventional reflected white light images. To label malignant cells (dysplasia, tumor) 5-aminolaevulinic acid was applied prior to fluorescence guided biopsy. In this way premalignant and malignant lesions were detected not seen previously during routine endoscopy.
© 2001 OSA/SPIE
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