Image quality of endoscopes

Peter F. Niederer; Juerg Haefliger; Patrick Blessing; Yves Lehareinger; Daniel Doswald; Norbert Felber

doi:10.1117/12.413778

19 January 2001 Image quality of endoscopes

Peter F. Niederer, Juerg Haefliger, Patrick Blessing, Yves Lehareinger, Daniel Doswald, Norbert Felber

Proceedings Volume 4158, Biomonitoring and Endoscopy Technologies; (2001) https://doi.org/10.1117/12.413778
Event: EOS/SPIE European Biomedical Optics Week, 2000, Amsterdam, Netherlands

Abstract

Medical endoscopy has become a key technology for the purposes of minimally invasive diagnostic and therapeutic procedures. With the aid of an endoscope, and external observation of a location inside the human body which may be difficult or dangerous to reach or which should be subjected to minimal traumatization associated with the intended medical treatment is facilitated through a viewing channel. A television camera is usually attached to the distal end of an endoscope for image presentation. Of primary importance for the user are image quality, ease of application and safety. This communication is primarily concerned with aspects relating to image quality. First, the optical properties of various types of endoscopes are analyzed and their spatial resolution is determined. Second, it is shown that the inherent optical quality in terms of spatial, temporal and contrast resolution of most endoscopes exceeds the performance limits of presently used standard TV systems in part substantially. Accordingly, a special purpose advanced digital television system exhibiting high spatial resolution, furthermore true color and high contrast dynamics has been developed. Since endoscopic images usually are circular, its aspect ratio is quadratic with a spatial resolution of 1000 x 1000 pixels. The framing rate is variable from 1 Hz to 30 Hz noninterlaced. Some design aspects and the performance of the system are shown and further applications are indicated.

Citation Download Citation

Peter F. Niederer, Juerg Haefliger, Patrick Blessing, Yves Lehareinger, Daniel Doswald, and Norbert Felber "Image quality of endoscopes", Proc. SPIE 4158, Biomonitoring and Endoscopy Technologies, (19 January 2001); https://doi.org/10.1117/12.413778

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