Quality evaluation for compressed medical images

Since 1990, Dr. Cosman has been involved in quality evaluation for compressed medical images. The main goal of the projects has been to evaluate diagnostic quality of compressed images by having radiologists do diagnostic interpretations of images which have been compressed at different bit rates. The interpretation may involve detection, measurement, or management decisions. Analysis of these results provides information on what level of compression is statistically equivalent to the original images.

More information on the current research can be found at the Digital Mammography Image Quality Project site at Stanford University.

Publications resulting from this research are:

P.C. Cosman, C. Tseng, R.M. Gray, R.A. Olshen, L.E. Moses, H.C. Davidson, C.J. Bergin, and E.A. Riskin, ``Tree-structured vector quantization of CT chest scans: image quality and diagnostic accuracy,'' IEEE Transactions on Medical Imaging, Vol. 12, No. 4, pp. 727-739, December 1993

P.C. Cosman, H.C. Davidson, C.J. Bergin, C. Tseng, R.A. Olshen, L.E. Moses, E.A. Riskin, and R.M. Gray, ``Thoracic CT images: Effect of lossy compression on diagnostic accuracy,'' Radiology, Vol. 190, pp. 517-524, February 1994

P.C. Cosman, R.M. Gray, and R.A. Olshen, ``Evaluating quality of compressed medical images: SNR, subjective rating, and diagnostic accuracy,'' Proceedings of the IEEE, Vol. 82, No. 6, pp. 919-932, June 1994

S.M. Perlmutter, P.C. Cosman, R.M. Gray, et al, ``Image quality in lossy compressed digital mammograms,'' Signal Processing, Special issue on medical image compression, June 1997.

S.M. Perlmutter, P.C. Cosman, C.-W. Tseng, R.A. Olshen, R.M. Gray, K.C.P. Li, and C.J. Bergin, ``Lossy Compressed Medical Images and Measurement Accuracy,'' Statistical Science, to appear.

R.A. Olshen, P.C. Cosman, C. Tseng, C. Davidson, L. Moses, R.M. Gray, and C. Bergin, ``Evaluating compressed medical images,'' Proceedings COMCON III, pp. 830-840, Victoria, B.C., Canada, October 1991

H.C. Davidson, C.J. Bergin, C. Tseng, P.C. Cosman, L.E. Moses, R.A. Olshen, and R.M. Gray, ``The effect of lossy compression on diagnostic accuracy of thoracic CT images,'' Presented at the 77th Scientific Assembly of the Radiological Society of North America (RSNA), Chicago, IL, December 1991

P.C. Cosman, C. Tseng, R.A. Olshen, and R.M. Gray, ``Predicting perceptual quality from SNR in compressed medical images,'' SID '93 Digest of Technical Papers, pp. 309-312, Society for Information Display, Seattle, WA, May 1993

S.M. Perlmutter, C. Tseng, P.C. Cosman, K.C.P. Li, R.A. Olshen, and R.M. Gray, ``Measurement accuracy as a measure of image quality in compressed MR chest scans,'' Proceedings First International Conference on Image Processing, ICIP '94, Vol. I, pp. 861-865, Austin, TX, November 1994

R.M. Gray, R.A. Olshen, D. Ikeda, P.C. Cosman, S. Perlmutter, C. Nash, and K. Perlmutter, ``Evaluating Quality and Utility in Digital Mammography,'' Proceedings Second International Conference on Image Processing, ICIP '95, Vol. II, pp. 5-8, Washington D.C., October 1995

R.M. Gray, R.A. Olshen, D. Ikeda, P.C. Cosman, S.M. Perlmutter, C. Nash, and K.O. Perlmutter, ``Measuring Quality in Computer Processed Radiological Images,'' Proceedings Twenty-ninth Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, November 1995

R.M. Gray, R.A. Olshen, D. Ikeda, and P.C. Cosman, ``Evaluating Quality and Utility of Digital Mammograms and Lossy Compressed Digital Mammograms,'' 3rd International Workshop on Digital Mammography, Chicago, IL, June 1996

R.M. Gray, R.A. Olshen, D. Ikeda, P.C. Cosman, S.M. Perlmutter, C. Nash, and K.O. Perlmutter, "Full breast digital imaging (FBDI) as a screening device: Summary of clinical protocol" Technical report, March 1995. Report submitted to Panel on Digital Mammography, Food and Drug Administration, 6 March 1995, and described in the transcription "Radiological Devices Panel Meeting" available from CASET Associates, Ltd. 10201 Lee Highway, Suite 160, Fairfax, VA 22030