| Japanese |
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| Title | Single Photon Emission Computed Tomography (SPECT) によるThallium-201心筋シンチグラフィの定量診断 (基礎的検討) |
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| Subtitle | 原著 |
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| Authors | 植原敏勇*, 西村恒彦*, 林田孝平*, 小塚隆弘*, 林真*, 山田幸典*, 岡尚嗣*, 田中啓子* |
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| Organization | *国立循環器病センター放射線診療部 |
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| Journal | 核医学 |
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| Volume | 21 |
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| Number | 10 |
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| Page | 1301-1313 |
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| Year/Month | 1984/10 |
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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」SPECTを利用した201TlClによる心筋断層像について基礎的検討を行った. データ収集に関しては5°〜10°ごと1方向30秒以上のデータ収集が必要であった. Single head 180°収集とDual head 360°収集には画像上多小差はあるが, 臨床的にperfusion defectを診断するには差はないと考えられた. データ処理は, まずスムージングを行いShepp and Roganフィルターを使用し体軸横断断層像を構成しこれより心筋長軸・短軸断層像を再構成した. これらの断層像は, 吸収補正を行っても完全には均一にならない. 剖検例の検討などからこれは心筋自体の壁厚が均一でなく心尖部などは実際に薄いこと. 中隔壁は側壁より短いことなどがその原因と考えられた. したがって心筋ECT像の診断は正常でも均一な濃度にならないものに対して, その濃度の高低を判定するという微妙な作業になるため, 視覚的診断では困難な場合もあると考えられた. ここに定量診断の有用性が示唆された. またSPECT法の精度に関しても検討し, 2台カメラの対向, 視野, 回転中心の調整が十分であれば断層像としての精度が高いことを確認した. |
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| Practice | 臨床医学：一般 |
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| Keywords | Single photon emission computed tomography, 201TlCl myocardial imaging, Absorption correction, Circumferential profile analysis. |
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| English |
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| Title | Quantitative Evaluation of 201TlCl Myocardial Tomography Using SPECT (Single Photon Emission Computed Tomography) : Basic Evaluation |
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| Subtitle | Original Articles |
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| Authors | Toshiisa UEHARA, Tsunehiko NISHIMURA, Kohhei HAYASHIDA, Takahiro KOZUKA, Makoto HAYASHI, Yukinori YAMADA, Keiko TANAKA, Hisashi OKA |
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| Authors(kana) | |
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| Organization | Department of Radiology, National Cardiovascular Center |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 21 |
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| Number | 10 |
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| Page | 1301-1313 |
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| Year/Month | 1984/10 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary]201Tl myocardial tomography using SPECT (Single Photon Emission Computed Tomography) was evaluated experimentally. With regard to data acquisition, every five or ten degrees, 30 seconds per one direction were needed. Comparing the single head 180° with dual-head 360° data acquisition, there was a little difference in the imagings but there was no difference to detect the perfusion defect clinically. With regard to data analysis, myocardial long-axial and short-axial imagings were constracted. These imagings were not homogenious instead of proper absorption correction. The estimation of autopsy revealed the cause of that inhomogenicity, that the thickness of myocardial wall was not homogeneous and symmetric and the length of septal wall was shorter than that of lateral wall. So, the diagnosis of myocardial perfusion in the myocardial ECT imagings depends on the evaluation of the degree of the density. This is very delicate work for visual diagnosis, and on the other hand the quantitative analysis seems to be suitable. The tomographic precision of SPECT method was evaluated. As the result, the precision of SPECT was proved to be very excellent, as far as the adjustment of dual-head cameras was correct. |
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| Practice | Clinical medicine |
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| Keywords | Single photon emission computed tomography, 201TlCl myocardial imaging, Absorption correction, Circumferential profile analysis. |
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