Title :
Visual psychophysics and medical imaging: nonparametric adaptive method for rapid threshold estimation in sensitivity experiments
Author :
Klymenko, Victor ; Pizer, Stephen M. ; Johnston, R.E.
Author_Institution :
Dept. of Radiol., North Carolina Univ., Chapel Hill, NC, USA
fDate :
12/1/1990 12:00:00 AM
Abstract :
The M-AFC (alternatively forced choice) transformed up-down adaptive method for the rapid determination of visual thresholds in medical images is described. The method is very efficient in obtaining thresholds to medical imaging parameters; in addition, it is free from criterion bias, an important concern in radiology, and it is free from parametric assumptions about the stimulus scale, which is often unknown due to the complexity of medical images. Issues of experimental design are presented that arise in the use of this method, and the psychological caveats which should be followed with human observers are noted. Two experiments are presented to demonstrate the method´s efficacy in determining thresholds and psychometric functions in medical images
Keywords :
patient diagnosis; vision; criterion bias; experimental design; imaging parameters; medical images complexity; medical imaging; nonparametric adaptive method; psychological caveats; radiology; rapid threshold estimation; sensitivity experiments; stimulus scale; Biomedical imaging; Biomedical measurements; Design for experiments; Digital images; Displays; Image generation; Image reconstruction; Medical diagnostic imaging; Psychology; Radiology;
Journal_Title :
Medical Imaging, IEEE Transactions on
