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Digital color imaging colposcopy: a matter of choice
E H Hopman1, L Rozendaal, R H Verheijen
1Department of Obstetrics and Gynecology, Free University Hospital, Amsterdam, The Netherlands.
Objective:
To describe the technical performance of a digital color imaging colposcopy (DCIC) system.
Study Design:
A videocamera has been selected on the basis of physical size and technical performance. Four digitizer boards with different analogue input signals and different digitizing properties, have been tested with a video test image. The technical performance of a DCIC-system has been analyzed.
Results:
A 3-CCD color videocamera gives the best analogue registration. Signal transfer by RGB-videosignal gives superior color and spatial resolution when compared to Y/C in composite videotransfer. Digitalization of the analogue videoimage with less than 24-bit resolution digitizer boards resulted in unwanted side effects that were related to the color measurement accuracy.
Conclusions:
Digital imaging colposcopy requires a 3-CCD videocamera of which the videosignal is transferred as an RGB-signal to a digitizerboard with 24-bit resolution that provides 16 million different colors. To store the image a large medium that is easily accessible is needed.