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Proceedings Paper

CT scout z-resolution improvement with image restoration methods
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Paper Abstract

Currently, new applications demand utilizing CT scout images for diagnostic purposes. However, many CT scout images cannot be used diagnostically due to their poor resolution, particularly in the direction of table movement. Spatial resolution generally can be improved with image restoration techniques. Based on the principles of Wiener filtering and inverse filtering, this paper presents a modified Wiener filtering approach in the frequency domain. The concept of equivalent target point spread function is introduced, which makes the restoration process steerable. Consequently, balancing resolution improvement with noise suppression is facilitated. Experiments compare the image quality with traditional inverse filtering and Wiener filtering. The modified Wiener filtering method has been shown to restore the scout image with higher resolution and lower noise.

Paper Details

Date Published: 15 May 2003
PDF: 7 pages
Proc. SPIE 5032, Medical Imaging 2003: Image Processing, (15 May 2003); doi: 10.1117/12.480308
Show Author Affiliations
Yufeng Zheng, Univ. of Louisville (United States)
Xiaohui Cui, Univ. of Louisville (United States)
Mark P. Wachowiak, Univ. of Louisville (United States)
Adel S. Elmaghraby, Univ. of Louisville (United States)


Published in SPIE Proceedings Vol. 5032:
Medical Imaging 2003: Image Processing
Milan Sonka; J. Michael Fitzpatrick, Editor(s)

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