Sharpness comparison method for various medical imaging systems

✍ Scribed by Masayuki Ukishima; Toshiya Nakaguchi; Katsushi Kato; Yoshikazu Fukuchi; Norimichi Tsumura; Kazumasa Matsumoto; Noriyuki Yanagawa; Takashi Ogura; Takashi Kikawa; Yoichi Miyake

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 510 KB
• Volume: 90
• Category: Article
• ISSN: 8756-663X
• DOI: 10.1002/ecjb.20404

✦ Synopsis

Abstract

In recent years, many kinds of displays and recording systems for X‐ray medical images have appeared. In this paper, sharpness of X‐ray images displayed onto high‐accuracy monochrome CRT and LCD monitors was analyzed and compared. Images recorded on the exclusive film and coated paper by inkjet printer and the wet‐type and dry‐type photo printers using a silver halide material were also analyzed and compared. The modified Gan's method was introduced to calculate the modulation transfer function (MTF) from the edge spread function (ESF). The results showed that the MTFs of the LCD, the inkjet image on the transparency, and the wet‐type silver halide film image have fairly similar and good response in comparison with the inkjet image on the glossy paper and the dry‐type silver halide film. It was also shown that the CRT has the worst response over the spatial frequency range. It was well correlated between the MTF and observer rating value. We thus consider the proposed method to be effective. © 2007 Wiley Periodicals, Inc. Electron Comm Jpn Pt 2, 90(11): 65–73, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecjb.20404