Digital halftoning of medical images

Ronald W. Silkman; Kevin J. Parker

doi:10.1117/12.207622

27 April 1995 Digital halftoning of medical images

Ronald W. Silkman, Kevin J. Parker

Proceedings Volume 2431, Medical Imaging 1995: Image Display; (1995) https://doi.org/10.1117/12.207622
Event: Medical Imaging 1995, 1995, San Diego, CA, United States

Abstract

This work considers the use of digital halftones in the display of medical images. One might assume that the use of halftone rendering (as opposed to continuous tone image rendering) will degrade the information in medical images, therefore, it is interesting to study what degree of degradation is unacceptable in medical images. We analyze various halftoning techniques quantitatively by first generating low-contrast detail diagrams (CDD) made to represent computed tomography (CT), magnetic resonance (MR), and ultrasound (US) modality images. These are then halftoned and printed using error diffusion, Bayer's method, blue noise mask, and centered weighted dots. The contrast areas in the diagram are randomly placed on a 5 X 5 grid. A single observer is used to determine the minimum contrast `lesion' that could be observed. The results for minimum detectable contrast depend on resolution (dots per inch), modality, and halftoning technique. It is shown that acceptable halftone rendering, with small degradation, can be achieved under certain conditions.

Citation Download Citation

Ronald W. Silkman and Kevin J. Parker "Digital halftoning of medical images", Proc. SPIE 2431, Medical Imaging 1995: Image Display, (27 April 1995); https://doi.org/10.1117/12.207622

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KEYWORDS

Image filtering

Halftones

Medical imaging

Computed tomography

Diffusion

Magnetic resonance imaging

Ultrasonography

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