| Japanese |
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| Title | 201Tl肺内取り込み増加の心筋SPECTに対する影響 - 拡張型心筋症における検討 - |
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| Subtitle | 原著 |
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| Authors | 田中健*, 中野元*, 加藤和三* |
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| Organization | *心臓血管研究所 |
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| Journal | 核医学 |
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| Volume | 29 |
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| Number | 11 |
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| Page | 1285-1291 |
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| Year/Month | 1992/11 |
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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」増加した201Tl肺内取り込みの心筋SPECTに対する影響を心不全状態にある拡張型心筋症15例において検討した. SPECTでも心筋像と増加した201Tl肺内取り込みとの境界は分離できなかった. 画像としては側壁が肥大しているように, 時には側壁の欠損が修飾されるように, また中隔の取り込み低下が強調されるように表現され, 遅延像によりこの影響が軽減した. 遅延像で中隔の%201Tl摂取率は平均8(2-15)%増加した. この再分布は201Tl肺内取り込みの散乱による側壁におけるカウント増加が遅延像で改善したことの反映で, 見掛けの再分布現象(pseudo-redistribution)である. ファントム実験でも増加した201Tl肺内取り込みの散乱により隣接心筋部位のカウントが高まることが示された. 201Tl肺内取り込み増大は心筋SPECTに有意に影響し, この影響を少なくするには遅延像を用いればよいことが明らかとなった. 同様のことは123I-MIBG肺内取り込みでも生じると考えられる. |
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| Practice | 臨床医学：一般 |
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| Keywords | Increased 201Tl lung uptake, Dilated cardiomyopathy, 201Tl SPECT, Myocardial viability, pseudo-redistribution. |
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| English |
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| Title | Influence of Increased 201Tl Lung Uptake on the Myocardial Viability of the Patients with Dilated Cardiomyopathy under Congestive Heart Failure |
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| Subtitle | Original Articles |
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| Authors | Takeshi TANAKA, Hajime NAKANO, Kazuzo KATOH |
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| Authors(kana) | |
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| Organization | The Cardiovascular Institute |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 29 |
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| Number | 11 |
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| Page | 1285-1291 |
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| Year/Month | 1992/11 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary]Influence of increased 201Tl lung uptake on the myocardial viability was studied in 15 patients with dilated cardiomyopathy under congestive heart failure. Rest and 4 hours delayed 201Tl SPECT were obtained. At the same time anterior planar images were collected. In 10 patients of 15 patients 201Tl lung heart ratio in SPECT (LHR) was larger than that in planar images. Maximal 201Tl lung uptake was noted at the lower left lung adjacent to the heart. In the delayed images 201Tl lung uptake diminished. In 10 patients the value of LHR in the delayed images was less than 0.5. By comparing initial images with delayed images it was proved to be difficult to determine the myocardial margin adjacent to the increased 201Tl lung uptake. In 2 patients lateral defects were concealed by the increased 201Tl lung uptake. In the remaining patients lateral wall was similar to the hypertrophic myocardium. The effect of scatter due to the increased 201Tl lung uptake was noted in the neighboring myocardium. In most cases %201Tl uptake in the septum was relatively depressed by increased %201Tl uptake in the lateral wall. In the delayed images pseudo-redistribution was noted in the septum. Mean value of differences in %201Tl uptake between initial and delayed images was 8 (2-15)%. It was concluded that in case of increased 201Tl lung uptake SPECT could not accurately estimate myocardial viability by initial images and delayed images were necessary for precise estimation. |
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| Practice | Clinical medicine |
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| Keywords | Increased 201Tl lung uptake, Dilated cardiomyopathy, 201Tl SPECT, Myocardial viability, pseudo-redistribution. |
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