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Article type: Cover
1990 Volume 46 Issue 9 Pages
Cover23-
Published: September 01, 1990
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Article type: Index
1990 Volume 46 Issue 9 Pages
Toc23-
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Article type: Index
1990 Volume 46 Issue 9 Pages
Toc24-
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Article type: Appendix
1990 Volume 46 Issue 9 Pages
i-vi
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Article type: Appendix
1990 Volume 46 Issue 9 Pages
vii-viii
Published: September 01, 1990
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SIGERU MIZUNO, TOMOYASU TAKADA, KAZUHARU FURUTA
Article type: Article
1990 Volume 46 Issue 9 Pages
1507-1513
Published: September 01, 1990
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Reading of the pulmonary area in a chest X-P is considered "to be well managed in such a way as it tries to find any anomaly differing from the normal while following the lung marking". It has been shown that the visibility of the lung marking as followed visually may be largely influenced not only by the contrast of the lung marking but also by that of the costal shadow. For example, the lower contrast of the costal shadow may lead to a more visible photo for a constant contrast of the lung marking, These findings led us to make a simulated examination of the relation between the contrast of the lung marking and that of the costal shadow in case of photographing conditions such as tube voltage, an additional filter and the like have been changed. The results revealed that for the same high voltage effect, no difference in visibility of the lung marking and lesions seemed to exist between aluminum and copper filters and that far less exposure multiples were required for copper filters to obtain the same high voltage effect.
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TOSHIHARU SAKUMA, YOSHIHIRO NISHIMURA, YUKINORI YAMADA, KAZUO SUGUMI
Article type: Article
1990 Volume 46 Issue 9 Pages
1514-1521
Published: September 01, 1990
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We have examined the potential of the phase images of a FLASH (fast low angle shot) type gradient echo to evaluate the change in the local magnetic field caused by the susceptibility effect. Our experiments were carried out by using concentric spherical phantoms filled with dilute copper chloride water solutions. As a result, the phase shift at the boundary of the inner sphere was proportional to the echo time and the difference in the concentration between the inner and outer spheres of a phantom. The phase shift was also influenced by orientation and position of an imaging plane, and imaging parameters such as the slice thickness and zoom factor. The experimentally observed values of the phase shift were nearly equal to the theoretically predicted values, if the difference in concentration between the inner and the outer sphere was not large and the echo time was not long. Phase images of the FLASH type gradient echo were very useful, because we could obtain the phase and magnitude images simultaneously. It was suggested that the change in the local magnetic field and magnetic susceptibility of the intracerebral hemorrhage may be estimated by using the phase images of the FLASH type gradient echo.
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KIYOSHI OGAWA, KATSUMI OONO, KEIJI SUZUKI, HITOMI KIMURA, TOSIHARU TAK ...
Article type: Article
1990 Volume 46 Issue 9 Pages
1522-1530
Published: September 01, 1990
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Evaluation of Brain Functional Image on Dynamic X-CT. Functional image of Dynamic CTs were evaluated for a comparison with ^<123>I IMP SPECT in 21 patients in the acute cerebral icshemia stage. The lesion detected by FID-CT was very consistent with that shown by SPECT in 81.0% of the patients. So it was shown that this study was useful because the method can be easily and quickly performed and it discloses the ischemic area with a fair degree of certainty. Although, Computed Tomography (CT) instruments of the third generation are expected, they can not completely to seize the fast cerebral blood flow in the arterial phase, so we have studied the quality and patterns of the time density curves regarding 74 cases and compared them with the functional image. No reliance can be placed on the A and TA-images of the functional image, because an error occurs regarding the time of appearance.
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[in Japanese]
Article type: Article
1990 Volume 46 Issue 9 Pages
1531-1533
Published: September 01, 1990
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EISHU SHINKAI
Article type: Article
1990 Volume 46 Issue 9 Pages
1534-1543
Published: September 01, 1990
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MASAO SAKO
Article type: Article
1990 Volume 46 Issue 9 Pages
1544-1549
Published: September 01, 1990
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HIROAKI NAITO
Article type: Article
1990 Volume 46 Issue 9 Pages
1550-1554
Published: September 01, 1990
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[in Japanese]
Article type: Article
1990 Volume 46 Issue 9 Pages
1555-1558
Published: September 01, 1990
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SHINICHI YANAGIMOTO
Article type: Article
1990 Volume 46 Issue 9 Pages
1559-1563
Published: September 01, 1990
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[in Japanese]
Article type: Article
1990 Volume 46 Issue 9 Pages
1564-1567
Published: September 01, 1990
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1990 Volume 46 Issue 9 Pages
1568-1572
Published: September 01, 1990
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1990 Volume 46 Issue 9 Pages
1573-1576
Published: September 01, 1990
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Article type: Appendix
1990 Volume 46 Issue 9 Pages
1577-1578
Published: September 01, 1990
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1990 Volume 46 Issue 9 Pages
1579-1592
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Article type: Appendix
1990 Volume 46 Issue 9 Pages
1593-1594
Published: September 01, 1990
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Article type: Appendix
1990 Volume 46 Issue 9 Pages
1595-
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Article type: Appendix
1990 Volume 46 Issue 9 Pages
1595-
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Article type: Appendix
1990 Volume 46 Issue 9 Pages
1595-
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1990 Volume 46 Issue 9 Pages
1595-
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1990 Volume 46 Issue 9 Pages
1595-
Published: September 01, 1990
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1990 Volume 46 Issue 9 Pages
1595-1596
Published: September 01, 1990
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1990 Volume 46 Issue 9 Pages
1596-
Published: September 01, 1990
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1990 Volume 46 Issue 9 Pages
1596-
Published: September 01, 1990
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1990 Volume 46 Issue 9 Pages
1596-
Published: September 01, 1990
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1990 Volume 46 Issue 9 Pages
1596-
Published: September 01, 1990
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1990 Volume 46 Issue 9 Pages
1596-1597
Published: September 01, 1990
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1990 Volume 46 Issue 9 Pages
1597-
Published: September 01, 1990
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1990 Volume 46 Issue 9 Pages
1597-
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Article type: Appendix
1990 Volume 46 Issue 9 Pages
1598-1600
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Article type: Appendix
1990 Volume 46 Issue 9 Pages
1601-1603
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Article type: Appendix
1990 Volume 46 Issue 9 Pages
1603-
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Article type: Appendix
1990 Volume 46 Issue 9 Pages
1603-
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Article type: Appendix
1990 Volume 46 Issue 9 Pages
App24-
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Article type: Appendix
1990 Volume 46 Issue 9 Pages
App25-
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Article type: Appendix
1990 Volume 46 Issue 9 Pages
App26-
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Article type: Cover
1990 Volume 46 Issue 9 Pages
Cover24-
Published: September 01, 1990
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