Share Email Print
cover

Proceedings Paper

Clinical evaluation of wavelet compression of digitized chest x-rays
Author(s): Bradley J. Erickson; Armando Manduca; Kenneth R. Persons
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

In this paper we assess lossy image compression of digitalized chest x-rays using radiologist assessment of anatomic structures and numerical measurements of image accuracy. Forty chest x-rays were digitized and compressed using an irreversible wavelet technique at 10, 20, 40 and 80:1. These were presented in a blinded fashion with an uncompressed image for subjective A-B comparison of 11 anatomic structures as well as overall quality. Mean error, RMS error, maximum pixel error, and number of pixels within 1 percent of original value were also computed for compression ratios from 10:1 to 80:1. We found that at low compression there was a slight preference for compressed images. There was no significant difference at 20:1 and 40:1. There was a slight preference on some structures for the original compared with 80:1 compressed images. Numerical measures demonstrated high image faithfulness, both in terms of number of pixels that were within 1 percent of their original value, and by the average error for all pixels. Our findings suggest that lossy compression at 40:1 or more can be used without perceptible loss in the demonstration of anatomic structures.

Paper Details

Date Published: 7 May 1997
PDF: 6 pages
Proc. SPIE 3031, Medical Imaging 1997: Image Display, (7 May 1997); doi: 10.1117/12.273909
Show Author Affiliations
Bradley J. Erickson, Mayo Clinic and Foundation (United States)
Armando Manduca, Mayo Clinic and Foundation (United States)
Kenneth R. Persons, Mayo Clinic and Foundation (United States)


Published in SPIE Proceedings Vol. 3031:
Medical Imaging 1997: Image Display
Yongmin Kim, Editor(s)

© SPIE. Terms of Use
Back to Top