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

被引：0

作者：

Yokoyama, Daigo ^{[1
]}

Kimura, Yukiyoshi ^{[2
]}

Imanishi, Yasuhiro ^{[3
]}

Fujita, Naotoshi ^{[4
]}

Kodera, Yoshie ^{[1
]}

机构：

[1] Nagoya Univ, Sch Hlth Sci, Higashi Ku, 1-1-20 Daiko Minami, Nagoya, Aichi 4618673, Japan

[2] Nagoya Univ, Grad Sch Med Sci, Higashi Ku, Nagoya, Aichi 4618673, Japan

[3] JA Mie Kouseiren Matsusaka Gen Hosp, Matsusaka 5158566, Japan

[4] Nagoya Univ Hosp, Dept Radiol Technol, Showa Ku, Nagoya, Aichi 4668560, Japan

来源：

MEDICAL IMAGING 2010: PHYSICS OF MEDICAL IMAGING | 2010年 / 7622卷

关键词：

phase contrast mammography; reduction image; reduction rate; interpolation; noise power spectrum;

D O I：

10.1117/12.844093

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页数：8

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