| Japanese |
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| Title | ガンマカメラ回転型SPECTによるI-123画像の改良 - 適正コリメータとカメラ回転半径についての検討 - |
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| Subtitle | 《原著》 |
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| Authors | 村田啓*, 外山比南子**, 黒崎敦子*, 児島陽一*, 関要次郎***, 相羽正*** |
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| Authors(kana) | |
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| Organization | *虎の門病院放射線科, **筑波大学臨床医学系, ***虎の門病院脳神経外科 |
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| Journal | 核医学 |
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| Volume | 23 |
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| Number | 7 |
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| Page | 937-944 |
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| Year/Month | 1986/7 |
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| Article | 原著 |
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| Publisher | 日本核医学会 |
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| Abstract | 「要旨」: N-isopropyl-I-iodoamphetamine (IMP) は脳局所血流分布を知る指標として利用されつつある. しかし, IMPの脳への分布が少ないうえに, ガンマカメラ回転型SPECTでは脳と検出器間距離が長いために十分なカウントが得られないこともあって, 必ずしも満足のいく画像が得られないのが現状である. 本研究では, 2種のガンマカメラと既存の5種のコリメータを用いて, NaI-123を用いたファントム実験とIMPによる臨床評価を行って, I-123によるSPECT画像を改良するための検討をした. その結果, スラントホール型コリメータあるいは400 AC/Tカメラを使用して, より小さな回転半径でデータ収集をすることにより分解能が向上することがわかった. また, コリメータは低エネルギー高分解能型が適していた. |
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| Practice | 臨床医学：一般 |
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| Keywords | I-123, IMP, Rotating gamma camera SPECT, Slant hole collimator, Cut-off gamma camera. |
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| English |
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| Title | Improvement of Rotating Gamma Camera SPECT Imaage with I-123 - A Study for Adequate Collimator and Rotation Radius - |
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| Subtitle | Original Articles |
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| Authors | Hajime MURATA*, Hinako TOYAMA**, Atsuko KUROSAKI*, Yoichi KOJIMA*, Yojiro SEKI***, Tadashi AIBA*** |
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| Authors(kana) | |
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| Organization | *Division of Nuclear Medicine, Toranomon Hospital, **Institute of Clinical Medicine, University of Tsukuba, ***Division of Neurosurgery, Toranomon Hospital |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 23 |
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| Number | 7 |
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| Page | 937-944 |
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| Year/Month | 1986/7 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] : N-isopropyl-I-123-iodoamphetamine (IMP) can be used to evaluate regional cerebral perfusion. However, high quality image of IMP using conventional single photon ECT (SPECT) is not necessarily obtained because gamma camera rotating SPECT has larger head-to-detector distance. Furthermore, brain uptake of IMP is less than 8%of the injected dose. In the present investigation NaI-123 line phantom study and clinical study with IMP were performed to improve the resolution of I-123 SPECT image. A slant hole collimator attached to a conventional gamma camera and a cut-off camera, both of which have been developed to gain shorter object-to-detector distance, were evaluated. Three low energy, parallel hole collimators and a middle energy parallel hole collimator were also evaluated to select adequate collimator for I-123 imaging. In conclusion, low energy, high resolution, slant hole collimator or cut-off camera with low energy, high resolution, parallel hole collimator was useful for improvement of rotating gamma camera SPECT image with I-123. |
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| Practice | Clinical medicine |
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| Keywords | I-123, IMP, Rotating gamma camera SPECT, Slant hole collimator, Cut-off gamma camera. |
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