Smaller format, laser camera-generated images: acceptability and cost savings.
OBJECTIVE
To evaluate the use of laser-generated smaller images in neuroradiologic practice.


METHODS
Computed tomographic (CT) scans of the heads of five subjects were obtained at bone and brain windows in three formats: 12:1 (12 images on a 35 x 43-cm film), 15:1 and 20:1. Two laser-camera systems were used. Images were measured, physically separated, and reconstructed as a 35 x 43-cm ensemble; they were presented randomly to seven radiologists who assessed image size and interpretability. Observer preference was also noted. One camera system was evaluated for contrast and spatial resolution by a medical physicist.


RESULTS
These were negligible differences in image area between the 15:1 and 20:1 formats. No discernible differences in quality were found among the three formats. The 12:1 images were preferred by the radiologists, but the 20:1 images were deemed acceptable. Annualized cost savings of 46.7%, or $46,650, were projected for adoption of the 20:1 image format for neuroradiologic CT and magnetic resonance imaging.


CONCLUSIONS
No major differences were detected in image area between the 15:1 and the 20:1 image formats or in image quality among the three formats. Use of a smaller image format may result in substantial cost savings.
Caruso
R D
RD
Neuroradiology Division, SUNY Health Science Center, Syrocuse 13210, USA.
Rosenbaum
A E
AE
Chamberlain
C C
CC
D003362:Cost-Benefit Analysis; D005069:Evaluation Studies as Topic; D006257:Head / Q000000981:diagnostic imaging; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007834:Lasers; D014057:Tomography, X-Ray Computed / Q000191:economics / Q000295:instrumentation*