With recent developments, digital mammograms can be obtained with a small pixel size, i.e., high resolution; however,
the matrix size increases. Therefore, when the image is thinned out, image information is lost when the image is
displayed on a liquid crystal display (LCD). To resolve this issue, we have developed a super high resolution liquid
crystal display (SHR-LCD) by using a novel resolution enhancement technology for independent subpixel driving (ISD)
with three subpixels in each pixel element. However, the lack of image information caused by thinning of the image
cannot be ignored because the matrix size of a phase contrast mammogram (PCM) is very large as compared to that of a
conventional mammogram. We obtained noise and edge images by using the geometrical layouts of the PCM (7080 x
9480). We measured the Wiener spectrum (WS), modulation transfer function (MTF), and noise-equivalent number of
quanta (NEQ) of the images reduced by the nearest-neighbor, bilinear, and bicubic (sharpness and smooth) interpolations.
The reduction rate was approximately 0.14. We measured the WS and MTF when the PCM image was displayed on a
5-megapixel (MP) and 15-MP LCD. The bilinear interpolation technique gave the best image quality. The image quality
was further improved by using a 15-MP SHR-LCD.