| Autor: |
Miles, D A, Van Dis, M L, Peterson, M G |
| Zdroj: |
Dentomaxillofacial Radiology; August 1989, Vol. 18 Issue: 3 p100-104, 5p |
| Abstrakt: |
An experimental imaging device based on analogue video-enhancement was evaluated by comparing the information yield of three different screen/film radiographic combinations with that from conventional viewing methods. Twenty radiographic images of variable density for each screen/film combination were produced by exposing a test object for between 0.1 and 6.6 s and examined by 10 observers in two trials. Perceptibility curves were generated from the data to measure the information yield of each system. Multiple non-parametric t tests demonstrated no loss of information with the experimental device in the diagnostically useful exposure range (15-60 impulses). In addition, this range was extended, with the faster film/screen combinations, to lower exposures (8-12 impulses), suggesting that the device also has the potential to reduce radiation exposure. |
| Databáze: |
Supplemental Index |
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