| Japanese |
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| Title | 回転型ガンマカメラの心臓イメージングへの応用 - (第3報) 180°データ収集法によるタリウム心筋ECTの検討 - |
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| Subtitle | 原著 |
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| Authors | 玉木長良*, 向井孝夫*, 石井靖*, 藤田透*, 山本和高*, 湊小太郎*, 鳥塚莞爾* |
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| Authors(kana) | |
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| Organization | *京都大学医学部放射線核医学科 |
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| Journal | 核医学 |
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| Volume | 19 |
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| Number | 4 |
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| Page | 535-540 |
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| Year/Month | 1982/5 |
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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」タリウム心筋エミッションCT (ECT) の収集時間の短縮を計る目的で, 左後斜位 (LPO) から右前斜位 (RAO) までの180°データより断層像を再構成し, 360°法と比較した. 本法にて, 収集時間は22分から11分と短縮できた. 基礎検討では, 180°法は解像力がかえって向上し, 心臓ファントムの断層像では, 欠損のコントラストは向上した. 臨床例11例 (正常4例, 心筋梗塞7例) での検討でも, 180°法による断層像は, バックグラウンドが少なく, 心筋のコントラストを高め, 欠損をより明瞭に描出できた. 180°データ収集による心筋ECTは, 体内の吸収や散乱の多い心臓の裏側のデータを捨てるため, 収集時間を短縮できるだけでなく, 画質が改善され, 実用的な方法と考えられた. |
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| Practice | 臨床医学：一般 |
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| Keywords | 201Tl myocardial imaging, emission computed tomography, rotating gamma camera, a 180°data collection, heart |
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| English |
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| Title | Cardiac Emission Computed Tomography (ECT) Using a Rotating Gamma Camera (3) Evaluation of a 180°rotation mode for thallium ECT |
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| Subtitle | Original Articles |
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| Authors | Nagara TAMAKI, Takao MURAI, Yasushi ISHII, Toru FUJITA, Kazutaka YAMAMOTO, Kotaro MINATO, Kanji TORIZUKA |
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| Authors(kana) | |
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| Organization | Department of Radiology and Nuclear Medicine, Kyoto University Medical School |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 19 |
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| Number | 4 |
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| Page | 535-540 |
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| Year/Month | 1982/5 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] A technique of a 180°gamma camera rotation was described for myocardial emission computed tomography (ECT) using thallium-201, and was comparatively evaluated with a full 360°rotation mode. The gamma camera rotated from the left posterior oblique (LPO) to the right anterior oblique (RAO) position of a patient to collect 32 views, 20 seconds each, over a 180°angle. Total acquisition time was 11 min in the 180°scan, while it was 22 min in the routine 360°scan. In the study of line spread function, the 180°scan provided better resolution. In the cardiac phantom study, the perfusion defect was shown more clearly in the 180°scan without an apparent image distortion. Defect-to-normal wall count ratio (D/N) ratio) was lower in the 180°scan than in the 360°scan. Eleven cases including 4 normal persons and 7 patients with myocardial infarction underwent thallium ECT by both 180°and 360°scans. The former method provided better lesion contrast with less background noise in each case. D/N ratio in each case was lower in the 180°scan. We conclude that the 180°collection method is an improved and feasible technique for thallium myocardial ECT. |
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| Practice | Clinical medicine |
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| Keywords | 201Tl myocardial imaging, emission computed tomography, rotating gamma camera, a 180°data collection, heart |
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