Evaluation of plain-film digitizers: a comparison of different systems and models

Hans Roehrig; William J. Dallas; Hartwig R. Blume; Elizabeth A. Krupinski; Michel M. Rogulski; Jiahua Fan; Khushroo Gandhi

doi:10.1117/12.465616

3 May 2002 Evaluation of plain-film digitizers: a comparison of different systems and models

Hans Roehrig, William J. Dallas, Hartwig R. Blume, Elizabeth A. Krupinski, Michel M. Rogulski, Jiahua Fan, Khushroo Gandhi

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Proceedings Volume 4682, Medical Imaging 2002: Physics of Medical Imaging; (2002) https://doi.org/10.1117/12.465616
Event: Medical Imaging 2002, 2002, San Diego, California, United States

Abstract

This paper describes the results of the comparison of 5 film digitizers designed for medical application to find an appropriate film digitizer for a project involving display of mammograms on a high performance CRT. Two of the digitizers were of the laser-scanning type while 3 were based on CCD technology. The comparison included estimates of linearity, uniformity, signal-to-noise ratio and spatial resolution in terms of the Modulation Transfer Function (MTF). The digitizers investigated show vastly different results. No system excelled in all performance parameters. A laser scanning digitizer was chosen for the planned display project because (1) it had the best linearity (down to OD 4); (2) it had the highest SNR at OD 4; (3) it had a comparatively good MTF.

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Hans Roehrig, William J. Dallas, Hartwig R. Blume, Elizabeth A. Krupinski, Michel M. Rogulski, Jiahua Fan, and Khushroo Gandhi "Evaluation of plain-film digitizers: a comparison of different systems and models", Proc. SPIE 4682, Medical Imaging 2002: Physics of Medical Imaging, (3 May 2002); https://doi.org/10.1117/12.465616

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KEYWORDS

Modulation transfer functions

Binary data

Absorbance

Charge-coupled devices

Fourier transforms

Laser scanners

Spatial frequencies

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