Japanese Journal of Radiological Technology

Online ISSN : 1881-4883
Print ISSN : 0369-4305
ISSN-L : 0369-4305

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Volume 46, Issue 7

Displaying 1-33 of 33 articles from this issue

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[title in Japanese]

Article type: Cover
1990 Volume 46 Issue 7 Pages Cover19-
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322086

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[title in Japanese]

Article type: Index
1990 Volume 46 Issue 7 Pages Toc19-
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322087

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[title in Japanese]

Article type: Index
1990 Volume 46 Issue 7 Pages Toc20-
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322088

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[title in Japanese]

Article type: Appendix
1990 Volume 46 Issue 7 Pages i-vi
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322089

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[title in Japanese]

Article type: Appendix
1990 Volume 46 Issue 7 Pages vii-viii
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322090

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THE DETECTABILITY OF SIMULATED LOW-CONTRAST OBJECTS IN THE CT IMAGES ON A CRT

MASAHIRO HASHIDA, AKIYOSHI OHTSUKA, JUNJI MORISHITA, YOSHIE KODERA, SH ...

Article type: Article
1990 Volume 46 Issue 7 Pages 890-895
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322091

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The detectability of simulated low-contrast objects in CT images on a CRT were investigated. The limits of the detection of a signal (i. e., a disease) were discussed in terms of CRT diagnosis. Assuming that the CT images were observed on a CRT exposed with an abdominal condition, this experiment was performed. The 16-alternative forced-choice (16-AFC) experiments was employed to study the dependence of the detectability of test objects regarding objects size (0.25〜9cm^2), background noise level (RMS=20.6, 10.3, 5.7) and objects contrast (-1〜-16CT numbers). The CT images were displayed on a 735-line CRT (12-inch, interlaced, 256 gray levels). The results indicate that the detectability of low-contrast objects in the CT images on a CRT depends strongly on the background noise level and object size. When the RMS noise level was higher than 10 or the object size smaller than 1cm^2, the detectability decreased sharply. Through these results the limits of the detection of a signal in terms of CRT diagnosis could be observed.

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HUMAN ENGINEERING OF A RADIOLOGICAL DIAGNOSTIC SYSTEM : SURVEY OF OPERABILITY AND WORKING POSTURE ON EXAMINATION OF X-CT (Part II)

EIJI ANDOH, FUMIMARO YUBA, FUMIAKI UTO, SHIGEKI UYAMA, YUKITOSHI KOTOH ...

Article type: Article
1990 Volume 46 Issue 7 Pages 896-902
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322092

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The operability of X-CT systems was examined. Actual V.D.T operation using an X-CT system by 6 radiological technologists was videotaped, with their maneuvers being analyzed. The questionnaire suggested that switches were placed at locations inconvenient for operation in some X-CT systems. In this study a physical examination of 210 radiological technologists was carried out. Analysis of videotaped images of the operators showed that they technologists had there major types of posture. As a result of these results, it could be understood that we work more efficiently when anple writing space and separated CRT and a Keyboard are avaitable. We designed an X-CT work-station by in depth analysis of the ergonomic viewpoints.

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[title in Japanese]

[in Japanese], [in Japanese], [in Japanese]

Article type: Article
1990 Volume 46 Issue 7 Pages 903-910
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322093

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[title in Japanese]

[in Japanese]

Article type: Article
1990 Volume 46 Issue 7 Pages 911-919
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322094

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FUNDAMENTALS OF IMAGE EVALUATION

MASAKATSU HATAGAWA

Article type: Article
1990 Volume 46 Issue 7 Pages 920-924
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322095

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DETERMINATION OF ABSORBED DOSE BY JARP's PROTOCOL

TOSHIO UEDA

Article type: Article
1990 Volume 46 Issue 7 Pages 925-930
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322096

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RADIOGEOMETRIC PROJECTION OF COLON POLYP AND CANCER

TADAYUKI SATO

Article type: Article
1990 Volume 46 Issue 7 Pages 931-937
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322097

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[title in Japanese]

[in Japanese]

Article type: Article
1990 Volume 46 Issue 7 Pages 938-941
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322098

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[title in Japanese]

[in Japanese]

Article type: Article
1990 Volume 46 Issue 7 Pages 942-
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322099

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[title in Japanese]

[in Japanese]

Article type: Article
1990 Volume 46 Issue 7 Pages 943-
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322100

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[title in Japanese]

[in Japanese]

Article type: Article
1990 Volume 46 Issue 7 Pages 943-944
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322101

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[title in Japanese]

[in Japanese]

Article type: Article
1990 Volume 46 Issue 7 Pages 944-
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322102

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[title in Japanese]

[in Japanese]

Article type: Article
1990 Volume 46 Issue 7 Pages 944-945
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322103

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[title in Japanese]

[in Japanese]

Article type: Article
1990 Volume 46 Issue 7 Pages 945-946
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322104

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[title in Japanese]

[in Japanese]

Article type: Article
1990 Volume 46 Issue 7 Pages 946-
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322105

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[title in Japanese]

[in Japanese]

Article type: Article
1990 Volume 46 Issue 7 Pages 946-947
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322106

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[title in Japanese]

Article type: Appendix
1990 Volume 46 Issue 7 Pages 948-949
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322107

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[title in Japanese]

Article type: Appendix
1990 Volume 46 Issue 7 Pages 950-952
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322108

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[title in Japanese]

Article type: Appendix
1990 Volume 46 Issue 7 Pages 953-955
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322109

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[title in Japanese]

Article type: Appendix
1990 Volume 46 Issue 7 Pages 956-960
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322110

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[title in Japanese]

Article type: Appendix
1990 Volume 46 Issue 7 Pages 961-966
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322111

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[title in Japanese]

Article type: Appendix
1990 Volume 46 Issue 7 Pages 967-968
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322112

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[title in Japanese]

Article type: Appendix
1990 Volume 46 Issue 7 Pages 969-971
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322113

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[title in Japanese]

Article type: Appendix
1990 Volume 46 Issue 7 Pages 971-
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322114

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[title in Japanese]

Article type: Appendix
1990 Volume 46 Issue 7 Pages 971-
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322115

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[title in Japanese]

Article type: Appendix
1990 Volume 46 Issue 7 Pages App19-
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322116

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[title in Japanese]

Article type: Appendix
1990 Volume 46 Issue 7 Pages App20-
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322117

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[title in Japanese]

Article type: Cover
1990 Volume 46 Issue 7 Pages Cover20-
Published: July 01, 1990
Released on J-STAGE: June 29, 2017

DOIhttps://doi.org/10.6009/jjrt.KJ00003322118

JOURNAL FREE ACCESS

Download PDF (80K)

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