Tasman, Abel-Jan and Feldhusen, Friederike and Kolling, Gerold H. and Hosemann, Werner (1999) Video-endoscope versus endoscope for paranasal sinus surgery: Influence on visual acuity and color discrimination. AMERICAN JOURNAL OF RHINOLOGY, 13 (1). pp. 7-10. ISSN 1050-6586,
Full text not available from this repository.Abstract
Endoscopic and video-endoscopic visual acuity and color discrimination were investigated using a standard disk for testing visual acuity and a color discrimination test. A 1-chip-CCD-Camera (CCC) or 3-chip-CCD-Carnera plus digital image processing (digivideo) on the endoscope and a 15 inch high resolution video monitor were used. Color discrimination was investigated by comparing the ability to sort colored disk of low chromatic saturation (desaturated Panel D-15 Test), ranging from yellow to red, under direct vision or via monitor using the same 1-CCC- and 3-CCC-system. Visual acuity deteriorated by 1.58 +/- 0.16 steps (+/-SEM)for the I-CCC and 1.21 +/- 0.16 steps for the S-CCC plus digivideo compared to vision through the endoscope (p < 0.001 and p < 0.001). Visual acuity was significantly better for the 3-CCC-video-endoscope compared to the 1-CCC-video-endoscope (p = 0.0045). The difference in color discrimination between the naked eye and the I-CCC-monitor system was not significant. More mistakes were made with the 3-CCC-monitor system. The impairment of image quality with the video endoscope, which is experienced by many surgeons, is reflected in a marked loss of visual acuity in our experiments. Sharpness and contrast of the video-image are significantly enhanced by the 3-CCC plus digital image processing, compared to the I-CCC. Color discrimination, however, was not impaired by the I-CCC, indicating that color perception with the video-endoscope can be very good and may not contribute significantly to the loss of image quality.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ; |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Hals-Nasen-Ohren-Heilkunde |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 23 Nov 2022 06:47 |
| Last Modified: | 23 Nov 2022 06:47 |
| URI: | https://pred.uni-regensburg.de/id/eprint/48596 |
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