| Japanese |
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| Title | 心ポジトロンCTにおけるFast Dynamic Studyの有用性 |
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| Subtitle | 原著 |
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| Authors | 吉田勝哉*, 氷見寿治*, 増田善昭*, 稲垣義明*, 福田信男**, 山崎統四郎**, 舘野之男** |
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| Authors(kana) | |
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| Organization | *千葉大学医学部第三内科, **放射線医学総合研究所臨床研究部 |
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| Journal | 核医学 |
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| Volume | 22 |
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| Number | 6 |
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| Page | 861-866 |
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| Year/Month | 1985/6 |
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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」局所血流をみるトレーサーである13NH3を健常例に急速静注し, ポジトロンCTにより6秒ずつ連続20回のデータ収集 (fast dynamic study) を行った. 最初0-6秒の画像では, 13Nは主に右房, 右室腔に存在し, さらに肺を経て12-18秒では左房, 左室腔へ移行する. その後心腔から13Nが洗い出されて左室心筋横断像が得られた. また心筋の時間放射能曲線を, 画像上で心腔から心筋への放射能濃度の混じり合いを補正することにより得ることができた. 心腔の時間放射能曲線は, 心筋からの放射能濃度の影響のない左房腔に関心領域を設定して得た. これによりポジトロンCTによるfast dynamic studyが, トレーサーの心腔および心筋での経時的変化をとらえる有用な方法であることが示された. |
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| Practice | 臨床医学：一般 |
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| Keywords | 13NH3, Fast dynamic study, Cardiac positron CT |
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| English |
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| Title | Usefulness of Fast Dynamic Study in Cardiac Positron CT |
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| Subtitle | Original Articles |
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| Authors | Katsuya YOSHIDA*, Toshiharu HIMI*, Yoshiaki MASUDA*, Yoshiaki INAGAKI*, Nobuo FUKUDA**, Toshiro YAMASAKI**, Yukio TATENO** |
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| Authors(kana) | |
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| Organization | *Third Department of Internal Medicine, Chiba University School of Medicine, **Division of Clinical Research, National Institute of Radiological Sciences |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 22 |
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| Number | 6 |
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| Page | 861-866 |
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| Year/Month | 1985/6 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | Summary The purpose of this study is to evaluate the usefulness of the Positron CT (PCT) approach to the investigation of dynamic physiologic processes of the heart. Serial 6-second PCT scans for 2 minutes (fast dynamic study) were performed in 4 normal cases after bolus venous injection of 13NH3. On the first image (0-6 sec) , 13N activity was primarily in the right atrium and ventricle. On the third image (12-18 sec) , it was primarily in the left atrium and ventricle. After clearance from blood, the left ventricular myocardium was well visualized. Myocardial time-activity curves were derived from these serial PCT images after correction for cross-contamination from blood to myocardium. Blood pool time-activity curves were determined by assigning a region of interest over the left atrium that had no effect of spillover of radioactvity from myocardium. Our preliminary work indicated the potential usefulness of fast dynamic PCT for the observation of physiologic processes of the heart. |
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| Practice | Clinical medicine |
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| Keywords | 13NH3, Fast dynamic study, Cardiac positron CT |
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