Effect of ambient light variations on luminance ratio of CRT monitor and image contrast in ultrasonography

Shiro Hatanaka, Junji Morishita, Akiko Chishaki, Yukari Noguchi, Eisaku Hokazono, Yoko Komiya, Yoshiharu Higashida, Yoshinobu Shimanoe, Kunio Nakamura, Hiroyuki Tashiro

研究成果: ジャーナルへの寄稿記事

抄録

Variation in the luminance ratio of a cathode ray tube(CRT)monitor and the ultrasonographic images at different levels of ambient light(0-150 lux)was investigated to obtain optimum ambient light in the ultrasonography suite. The maximum and minimum luminances of test patterns and ultrasonographic images were measured after three technicians independently optimized the brightness and contrast of the CRT monitor and ultrasonographic images at different levels of ambient light. Furthermore, the luminance ratio was calculated from the maximum luminance divided by the minimum luminance. When ambient light increased, it was difficult for the technicians to optimize the brightness and contrast settings of the CRT monitor to maintain a high luminance ratio at 0 lux. The luminance ratio decreased rapidly as ambient light increased up to 20 lux. However, the luminance ratio decreased gradually when ambient light was higher than 20 lux. It is necessary to take into consideration the ambient light to maintain a high luminance ratio of ultrasonographic images.

元の言語英語
ページ(範囲)1512-1518
ページ数7
ジャーナルNippon Hoshasen Gijutsu Gakkai zasshi
65
発行部数11
DOI
出版物ステータス出版済み - 11 20 2009

Fingerprint

Cathode Ray Tube
Ultrasonography
Light

All Science Journal Classification (ASJC) codes

  • Medicine(all)

これを引用

Effect of ambient light variations on luminance ratio of CRT monitor and image contrast in ultrasonography. / Hatanaka, Shiro; Morishita, Junji; Chishaki, Akiko; Noguchi, Yukari; Hokazono, Eisaku; Komiya, Yoko; Higashida, Yoshiharu; Shimanoe, Yoshinobu; Nakamura, Kunio; Tashiro, Hiroyuki.

:: Nippon Hoshasen Gijutsu Gakkai zasshi, 巻 65, 番号 11, 20.11.2009, p. 1512-1518.

研究成果: ジャーナルへの寄稿記事

@article{a4f9ae496b9d4c38a0cedab009987909,
title = "Effect of ambient light variations on luminance ratio of CRT monitor and image contrast in ultrasonography",
abstract = "Variation in the luminance ratio of a cathode ray tube(CRT)monitor and the ultrasonographic images at different levels of ambient light(0-150 lux)was investigated to obtain optimum ambient light in the ultrasonography suite. The maximum and minimum luminances of test patterns and ultrasonographic images were measured after three technicians independently optimized the brightness and contrast of the CRT monitor and ultrasonographic images at different levels of ambient light. Furthermore, the luminance ratio was calculated from the maximum luminance divided by the minimum luminance. When ambient light increased, it was difficult for the technicians to optimize the brightness and contrast settings of the CRT monitor to maintain a high luminance ratio at 0 lux. The luminance ratio decreased rapidly as ambient light increased up to 20 lux. However, the luminance ratio decreased gradually when ambient light was higher than 20 lux. It is necessary to take into consideration the ambient light to maintain a high luminance ratio of ultrasonographic images.",
author = "Shiro Hatanaka and Junji Morishita and Akiko Chishaki and Yukari Noguchi and Eisaku Hokazono and Yoko Komiya and Yoshiharu Higashida and Yoshinobu Shimanoe and Kunio Nakamura and Hiroyuki Tashiro",
year = "2009",
month = "11",
day = "20",
doi = "10.6009/jjrt.65.1512",
language = "English",
volume = "65",
pages = "1512--1518",
journal = "Nippon Hoshasen Gijutsu Gakkai zasshi",
issn = "0369-4305",
publisher = "Nihon Hoshasen Gijutsu Gakkai/Japanese Society of Radiological Technology",
number = "11",

}

TY - JOUR

T1 - Effect of ambient light variations on luminance ratio of CRT monitor and image contrast in ultrasonography

AU - Hatanaka, Shiro

AU - Morishita, Junji

AU - Chishaki, Akiko

AU - Noguchi, Yukari

AU - Hokazono, Eisaku

AU - Komiya, Yoko

AU - Higashida, Yoshiharu

AU - Shimanoe, Yoshinobu

AU - Nakamura, Kunio

AU - Tashiro, Hiroyuki

PY - 2009/11/20

Y1 - 2009/11/20

N2 - Variation in the luminance ratio of a cathode ray tube(CRT)monitor and the ultrasonographic images at different levels of ambient light(0-150 lux)was investigated to obtain optimum ambient light in the ultrasonography suite. The maximum and minimum luminances of test patterns and ultrasonographic images were measured after three technicians independently optimized the brightness and contrast of the CRT monitor and ultrasonographic images at different levels of ambient light. Furthermore, the luminance ratio was calculated from the maximum luminance divided by the minimum luminance. When ambient light increased, it was difficult for the technicians to optimize the brightness and contrast settings of the CRT monitor to maintain a high luminance ratio at 0 lux. The luminance ratio decreased rapidly as ambient light increased up to 20 lux. However, the luminance ratio decreased gradually when ambient light was higher than 20 lux. It is necessary to take into consideration the ambient light to maintain a high luminance ratio of ultrasonographic images.

AB - Variation in the luminance ratio of a cathode ray tube(CRT)monitor and the ultrasonographic images at different levels of ambient light(0-150 lux)was investigated to obtain optimum ambient light in the ultrasonography suite. The maximum and minimum luminances of test patterns and ultrasonographic images were measured after three technicians independently optimized the brightness and contrast of the CRT monitor and ultrasonographic images at different levels of ambient light. Furthermore, the luminance ratio was calculated from the maximum luminance divided by the minimum luminance. When ambient light increased, it was difficult for the technicians to optimize the brightness and contrast settings of the CRT monitor to maintain a high luminance ratio at 0 lux. The luminance ratio decreased rapidly as ambient light increased up to 20 lux. However, the luminance ratio decreased gradually when ambient light was higher than 20 lux. It is necessary to take into consideration the ambient light to maintain a high luminance ratio of ultrasonographic images.

UR - http://www.scopus.com/inward/record.url?scp=77449091884&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77449091884&partnerID=8YFLogxK

U2 - 10.6009/jjrt.65.1512

DO - 10.6009/jjrt.65.1512

M3 - Article

C2 - 20019431

AN - SCOPUS:77449091884

VL - 65

SP - 1512

EP - 1518

JO - Nippon Hoshasen Gijutsu Gakkai zasshi

JF - Nippon Hoshasen Gijutsu Gakkai zasshi

SN - 0369-4305

IS - 11

ER -