Comparison of radiographic image quality from four digitization devices as viewed on computer monitors.
The objective of this study was to compare the quality of radiographic images digitized from commercial-grade and consumer-grade digital cameras and scanners as viewed on computer monitor. Radiographic images were digitized from hardcopy film using a commercial-grade laser scanner, a consumer-grade desktop flatbed scanner, a commercial-grade digital camera, and a consumer-grade digital camera. The quality of images without and with grayscale histogram adjustment was evaluated subjectively by 10 board-certified radiologists. Optical density response was evaluated objectively using a grayscale test pattern. There was no significant difference in subjective quality among images digitized with the commercial scanner, consumer scanner, and commercial camera. The quality of images digitized with the consumer camera was lower than the other 3. Objective tests showed the commercial scanner to have the most linear optical density response. For the purpose of viewing images on a computer monitor, a consumer-grade desktop scanner can produce images of similar quality to those produced by more expensive laser commercial-grade scanners and digital cameras and provides cost-efficient means to digitize radiographic plain films. A consumer-grade camera may not be optimal for use in this setting.
Davidson
H C
HC
Department of Radiology, University of Utah, Salt Lake City, USA.
Johnston
D J
DJ
Christian
M E
ME
Harnsberger
H R
HR
D000704:Analysis of Variance; D006801:Humans; D016018:Least-Squares Analysis; D011856:Radiographic Image Enhancement / Q000295:instrumentation* / Q000592:standards*; D014584:User-Computer Interface