Effects of a-priori information on detection of simulated lung nodules in digital chest radiography

George W. Seeley; Kelly Rehm; William J. Dallas

doi:10.1117/12.18816

1 July 1990 Effects of a-priori information on detection of simulated lung nodules in digital chest radiography

George W. Seeley, Kelly Rehm, William J. Dallas

Proceedings Volume 1231, Medical Imaging IV: Image Formation; (1990) https://doi.org/10.1117/12.18816
Event: Medical Imaging '90, 1990, Newport Beach, CA, United States

Abstract

Two years ago we first reported the preliminary results from an experimental methodology that we believed would be sensitive enough to enable the measurement of very subtle changes in observer detection performance [1]. If successful, we intended to apply this methodology to the evaluation of computer enhancement techniques. The procedure had two facets: generation of digital images using a 3M chest phantom with simulated lung and heart structures, and the presentation of reference information to the observers during the psychophysical experimental session. We used our Toshiba computed radiography (TCR) 201A system to generate the digital images. The digital images were a benchmark from which we could physically measure changes due to image processing. Eventually we hoped to be able correlate physical measurements taken from the digital image to psychophysical detection measurements to get a better understanding of the effect of processing on perception. We believe that this correlatiye information will eventually help us to find or develop enhancement techniques that measurably improve detection. Once we knew that a teOhnique increased detection, then we would apply it to clinical images and evaluate the technique's increases in diagnostic accuracy.

Citation Download Citation

George W. Seeley, Kelly Rehm, and William J. Dallas "Effects of a-priori information on detection of simulated lung nodules in digital chest radiography", Proc. SPIE 1231, Medical Imaging IV: Image Formation, (1 July 1990); https://doi.org/10.1117/12.18816

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