Noise-resistant weak-structure enhancement for digital radiography

Martin Stahl; Til Aach; Thorsten M. Buzug; Sabine Dippel; Ulrich Neitzel

doi:10.1117/12.348539

21 May 1999 Noise-resistant weak-structure enhancement for digital radiography

Martin Stahl, Til Aach, Thorsten M. Buzug, Sabine Dippel, Ulrich Neitzel

Proceedings Volume 3661, Medical Imaging 1999: Image Processing; (1999) https://doi.org/10.1117/12.348539
Event: Medical Imaging '99, 1999, San Diego, CA, United States

Abstract

Today's digital radiography systems mostly use unsharp masking-like image enhancement techniques based on splitting input images into two or three frequency channels. This method allows to enhance very small structures (edge enhancement) as well as enhancement of global contrast (harmonization). However, structures of medium size are not accessible by such enhancement. We develop and test a nonlinear enhancement algorithm based on hierarchically repeated unsharp masking, resulting in a multiscale architecture allowing consistent access to structures of all sizes. The algorithm is noise- resistant in the sense that it prevents unacceptable noise amplification. Clinical tests performed in the radiology departments of two major German hospitals so far strongly indicate the superior performance and high acceptance of the new processing.

Citation Download Citation

Martin Stahl, Til Aach, Thorsten M. Buzug, Sabine Dippel, and Ulrich Neitzel "Noise-resistant weak-structure enhancement for digital radiography", Proc. SPIE 3661, Medical Imaging 1999: Image Processing, (21 May 1999); https://doi.org/10.1117/12.348539

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