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Proceedings Paper

Noise characteristics of the reduction image displayed on liquid crystal display in digital mammography
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Paper Abstract

Soft-copy diagnosis of medical images is currently widespread. Because the pixel size of a digital mammogram is very small, the matrix size is extremely large. Especially the matrix size of phase contrast mammography (PCM) is very large compared with a conventional mammography. When such an image is displayed on a liquid crystal display (LCD), it is displayed as a reduction image. Therefore, it is necessary to use an appropriate reduction rate and an interpolation method such that the reduction processing does not influence the diagnosis. We obtained a uniform image exposure and measured the noise power spectrum (NPS) of the image reduced by using the nearest neighbor, bilinear, and bicubic methods with several reduction rates. Our results showed that the best interpolation method was the bilinear method. Moreover, the NPS value increased by a factor of the square of the inverse of the reduction rate.

Paper Details

Date Published: 23 March 2010
PDF: 8 pages
Proc. SPIE 7622, Medical Imaging 2010: Physics of Medical Imaging, 762248 (23 March 2010); doi: 10.1117/12.844093
Show Author Affiliations
Daigo Yokoyama, Nagoya Univ. (Japan)
Yukiyoshi Kimura, Nagoya Univ. (Japan)
Yasuhiro Imanishi, JA Mie Kouseiren Matsusaka General Hospital (Japan)
Naotoshi Fujita, Nagoya Univ. Hospital (Japan)
Yoshie Kodera, Nagoya Univ. (Japan)

Published in SPIE Proceedings Vol. 7622:
Medical Imaging 2010: Physics of Medical Imaging
Ehsan Samei; Norbert J. Pelc, Editor(s)

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