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Preliminary evaluation of display format effects on perceptibility in a low contrast ultrasound test object
Author(s) -
Sommer F. Graham,
Orphanoudakis Stelios C.,
Taylor Kenneth J. W.
Publication year - 1981
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.594900
Subject(s) - contrast (vision) , luminance , imaging phantom , artificial intelligence , echogenicity , computer science , homogeneous , computer vision , ultrasound , nuclear medicine , physics , medicine , radiology , thermodynamics
A phantom consisting of a gel closely resembling human liver on B ‐mode scanning, and containing a rounded zone of decreased echogenicity, was used to create a series of B ‐mode ultrasonic images containing simulated “lesions” in random locations on the final recorded image. A homogeneous gel phantom was used to create a series of blank images. Images were recorded in three display formats: conventional white on black background, conventional black on white background, and black on a white background with luminance normalized to that of the conventional white on black image. Six subjects were presented with a randomized series of scans in the 3 display formats, and receiver operating characteristic analysis was used to assess the effect of display format on low‐contrast detectability. Detectability of low‐contrast “lesions” was lower in a high contrast image with black on white background compared to the medium contrast image in white on black format. Detectability with the black on white format having normalized luminance was generally intermediate between that observed for the two conventional formats.