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Proceedings Paper

Restoration of nuclear medicine images using a Kalman filtering approach
Author(s): Thomas Schmitt; Heinz-Dieter Gebauer; Richard Freyer; Liane Oehme; Wolf-Gunter Franke
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Paper Abstract

The discrepancy between diagnostic importance of nuclear medicine images and their quality and the predominating visual interpretation of the images demand quality improvements. Digital image restoration procedures are known for being capable to solve this problem considering both noise and blurring. In this paper we propose the application of a modified 2D Kalman filter for nuclear medicine images (SPECT). In addition to the special capability of processing instationary signals the Kalman filter offers a possibility for controlling the filtering effect in a convenient way. The Kalman filter is based on a state space approach subdividing the imaging process into image generation and image degradation processes. The tested filter operates adaptively by permanent identification of the image generation model. For adaptation to the human visual system the filtering effect is modified depending on image quality represented by the mean information density and the local image contents represented by a structure information. The appropriate filtering effect is determined by modifying filter parameters with a predefined piecewise linear characteristic curve. The both smoothing and structure enhancing effect of our Kalman filtering approach is demonstrated in numerous tests performed with SPECT phantom images and brain SPECT studies.

Paper Details

Date Published: 23 March 1995
PDF: 6 pages
Proc. SPIE 2421, Image and Video Processing III, (23 March 1995); doi: 10.1117/12.205494
Show Author Affiliations
Thomas Schmitt, Dresden Univ. of Technology (Germany)
Heinz-Dieter Gebauer, Dresden Univ. of Technology (Germany)
Richard Freyer, Dresden Univ. of Technology (Germany)
Liane Oehme, Dresden Univ. of Technology (Germany)
Wolf-Gunter Franke, Dresden Univ. of Technology (Germany)


Published in SPIE Proceedings Vol. 2421:
Image and Video Processing III
Robert L. Stevenson; Sarah A. Rajala, Editor(s)

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