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Radiology, Vol 129, 515-520, Copyright © 1978 by Radiological Society of North America

ARTICLES

The effects of the film/screen combination on tomographic image quality

G Cohen, JO Barnes and PM Pena

Several film/screen combinations were studied to evaluate their effect on thin-section tomograms of the inner ear. Hypocycloidal images of a head phantom were subjectively ranked for image quality, and contrast, spatial frequency spectra, and Wiener noise spectra were measured. Resolution appears to be significantly improved when medium-speed screens are used instead of fast, unsharp screens; observers could perceive increased detail through the higher noise of the medium-speed screens. The authors conclude that medium-speed screens yield more diagnostic information than fast, unsharp screens in thin-section tomography of the inner ear.




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Copyright © 1978 by the Radiological Society of North America.