| Japanese |
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| Title | 静注24時間後の201Tl心筋SPECT撮像による心筋viabilityの評価の妥当性と問題点 |
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| Subtitle | 原著 |
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| Authors | 新井英和*, 斎藤滋*, 金國鐘*, 青木直人*, 足立玲子**, 安江亮** |
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| Organization | *湘南鎌倉病院循環器科, **放射線科 |
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| Journal | 核医学 |
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| Volume | 29 |
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| Number | 5 |
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| Page | 607-613 |
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| Year/Month | 1992/5 |
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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」201Tl心筋シンチグラフィを用いて心筋のviabilityをより正確に評価するために種々の撮像法の工夫が行われているが, 本研究では, 画質の低下が指摘されている24時間後の撮像による評価が妥当か否か, また, 24時間後像の画質に影響する因子に関し検討を行った. 陳旧性心筋硬塞, 狭心症, 正常冠動脈者のいずれの群においても, ほとんどの例で良好な24時間後像の撮像は可能であった(それぞれ, 87%, 88%, 81%). 24時間後像が良好であったものと不良であったものとの比較では, 24時間後像の画質に最も影響する因子は収集カウント数と考えられ, 画質の低下が問題となる男性例や体重の重い例では収集時間の延長などの工夫が必要と考える. |
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| Practice | 臨床医学：一般 |
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| Keywords | 201Tl myocardial scintigraphy, Myocardial viability, 24 hour imaging. |
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| English |
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| Title | Assessment of Myocardial Viability with 201Tl Myocardial SPECT 24 Hours after Injection |
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| Subtitle | Original Articles |
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| Authors | Hidekazu ARAI*, Shigeru SAITO*, Kunikane KIM*, Naoto AOKI*, Reiko ADACHI**, Ryo YASUE** |
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| Authors(kana) | |
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| Organization | *Division of Cardiology, Shonan Kamakura Hospital, **Division of Radiology, Shonan Kamakura Hospital |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 29 |
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| Number | 5 |
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| Page | 607-613 |
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| Year/Month | 1992/5 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary]Recently many investigators reported that conventional stress-redistribution myocardial scintigraphy with 201Tl underestimated the presence of ischemic but viable myocardium. We studied the usefulness of 24 hour 201Tl myocardial single photon emission computed tomography (SPECT) to assess myocardial viability and investigated the factors affect to the quality of 24 hour SPECT images. Study patients were consisted with 70 patients with old myocardial infarction (OMI), 72 patients with angina pectoris without OMI (AP) and 43 patients with angiographically proven normal coronary arteries. To obtain SPECT images, 10 minute and 4 hour imagings were sampled 30 seconds per projection. Twenty-four hour imaging wag sampled 60 seconds per projection. Twenty-four hour images were visually interpreted as good, moderate and poor quality. Then study patients were divided into 2 groups, group A with good 24 hour images and group B with moderate or poor 24 hour images. One hundred and fifty-eight patients (85.4%) of study patients had 24 hour SPECT images on a good quality. Only 4 patients (2.2%) had poor quality SPECT. All of these 4 patients had broad myocardial infarction. In patients with OMI 61 patients (87.1%), in AP 63 patients (87.5%) and in normal 35 patients (81.4%) had a good 24 hour SPECT. Total sampling counts and myocardial ROI counts were significantly higher in group A than in group B. Body weight was significantly higher and there were more male patients in group B than in group A. Late redistribution was seen in 20 patients (28.5%) with OMI and in 11 patients (15.3%) with AP. In most patients with OMI and AP we can get 24hour SPECT on a good quality. In patients with moderate or poor 24 hour SPECT sampling counts were significantly reduced. So, it may be possible to get good quality 24 hour image with longer sampling time. |
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| Practice | Clinical medicine |
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| Keywords | 201Tl myocardial scintigraphy, Myocardial viability, 24 hour imaging. |
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