| Japanese |
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| Title | 三検出器型SPECT装置 (PRISM-3000) による心筋3次元画像表示の有用性について |
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| Subtitle | 技術報告 |
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| Authors | 山崎純一*, 蒲野俊雄*, 内孝*, 飯田美保子*, 細井宏益*, 森下健*, 小暮喬**, 高野政明***, 高橋秀樹***, 丸山雄三***, 高橋宗尊**** |
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| Organization | *東邦大学内科学第一講座, **放射線科, ***RI, ****島津製作所 |
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| Journal | 核医学 |
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| Volume | 30 |
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| Number | 1 |
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| Page | 95-105 |
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| Year/Month | 1993/1 |
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| Article | 報告 |
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| Publisher | 日本核医学会 |
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| Abstract | 「要旨」三検出器型SPECT装置(PRISM-3000)は従来の単検出器型SPECT装置に比較して, 短時間に360度のデータ収集が可能であり, また各患者の体型を基準とした非円軌道を描くため, 空間分解能も向上した. さらにデータ処理の高速化により, 心筋3次元画像表示が短時間で済み, 臨床への応用を可能とした. そこで今回, 虚血性心疾患症例の心筋3次元画像表示を行い, その有用性と現時点での問題点について検討した. 心筋梗塞症例では梗塞領域をより客観的に把握することができ, 狭心症例でも3時間後遅延像で従来の心筋SPECT像に比較して, 再分布領域の評価がより容易であった, しかし, 現時点では虚血領域のThresholdを40〜50%の一定値に設定する必要があり, 虚血重症度評価が困難であるため, 今後新たなプログラムの導入が望まれる. 「I. はじめに」現在, 心臓核医学では心筋虚血や心筋障害判定にあたり, 心筋SPECT像が広く用いられているが, より客観的な評価法として心筋2次元画像表示や立体的観察を目的とした心筋3次元画像表示が試みられている. |
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| Practice | 臨床医学：一般 |
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| Keywords | Three heads SPECT camera, Three dimensional imaging, Ischemic heart disease. |
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| English |
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| Title | The Usefulness of Three Dimensional Imaging of the Myocardium Using Three Heads SPECT Camera (PRISM-3000) |
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| Authors | Jun-ichi YAMAZAKI*, Toshio KABANO*, Takashi UCHI*, Mihoko IIDA*, Hiromitsu HOSOI*, Takeshi MORISHITA*, Takashi KOGURE**, Masaaki TAKANO***, Hideki TAKAHASHI***, Yuzo MARUYAMA***, Munehiro TAKAHASHI**** |
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| Authors(kana) | |
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| Organization | *First Department of Internal Medicine, **Department of Radiology, ***Department of Radioisotope, Toho University School of Medicine, ****Shimadzu Corporation |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 30 |
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| Number | 1 |
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| Page | 95-105 |
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| Year/Month | 1993/1 |
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| Article | Report |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary]The SPECT unit using a 3 heads camera (PRISM-3000) has an advantage over the conventional one head camera SPECT unit because it can complete full circle scans (360° scans) within a short time, and because the non-circular orbit of the camera heads fitting the individual form of the body has improved the spatial resolution. In addition, the high speed data processing has reduced the time for scan, enabling the three dimensional imaging system clinically applicable. In the present study, this modern technique was used to examined the myocardium in patients with ischemic heart disease so as to evaluate it for usefulness and depict problem to be solved. In patients with myocardial infarction, images obtained with a PRISM-3000 machine could provide more objective information on infarcts than conventional images. In patients with angina pectoris, delayed images obtained 3 hours after exercise by the new method were superior to conventional ones in power of demonstrating redistribution. The setting of the threshold for ischemic lesions at 40-50% hampers the assessment of the severity of ischemia. A new program should be introduced to solve this problem. |
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| Practice | Clinical medicine |
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| Keywords | Three heads SPECT camera, Three dimensional imaging, Ischemic heart disease. |
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