| Project/Area Number |
15390359
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Radiation science
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| Research Institution | Nagoya University |
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Principal Investigator |
ISHIGAKI Takeo Nagoya University, Graduate School of Medicine, Professor, 大学院・医学系研究科, 教授 (60094356)
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| Co-Investigator(Kenkyū-buntansha) |
IKEDA Mitsuru Nagoya University, School of Medicine, Associate Profess, 医学部, 助教授 (50184437)
SHIMAMOTO Kazuhiro Nagoya University, School of Medicine, Professor, 医学部, 教授 (70178961)
KODERA Yosie Nagoya University, School of Medicine, Professor, 医学部, 教授 (10124794)
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| Project Period (FY) |
2003 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥8,500,000 (Direct Cost: ¥8,500,000)
Fiscal Year 2005: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2004: ¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2003: ¥3,100,000 (Direct Cost: ¥3,100,000)
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| Keywords | liquid crystal display / diagnostic ability of monitor / monitor for image diagnosis / safety of liquid crystal display |
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| Research Abstract |
Fundamental examination of a liquid crystal display monitor showed that IPS (In-plane Switching) mode and VA (Vertically Aligned) mode were most suitable as an object for diagnostic imaging. Although the time of luminosity degradation of a liquid crystal display monitor was far loose compared with the CRT monitor, when it became in continuation 10,000 hours, it turned out that luminosity falls to 70-80% of an initial value. Early luminosity is kept in the monitor in which the luminosity stabilization circuit is included for at least 10,000 hours. At the target of low contrast, a liquid crystal display can be used as substitution of a CRT monitor. The influence of indoor illumination was not significant and it was suggested also under bright lighting that a liquid crystal display can be used. even if compared with a CRT monitor about the diagnostic ability of a liquid crystal display monitor (1M, 2M, 3M, and 5M). That is, a liquid crystal display monitor can be replaced with a CRT monitor for diagnostic imaging (except for mammography). In the research of a mammo gram using 3M liquid crystal display monitor, the fall of the diagnostic ability of a non-palpable calcification lesion was not seen. From these research results, it is concluded that the test picture for the luminosity degradation judging of a CRT monitor (a clinical picture and contrast chart) would be applicable also to the luminosity degradation judging of a liquid crystal display monitor.
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