| Japanese |
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| Title | 3検出器型装置による心筋ゲートSPECTの基礎的検討 |
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| Subtitle | 技術報告 |
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| Authors | 杉岡靖*, 足立至*, 田渕耕次郎*, 雑賀良典*, 辰吉光*, 中田和伸*, 難波隆一郎*, 西垣洋*, 末吉公三*, 楢林勇*, 田本重美**, 大竹義章*** |
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| Organization | *大阪医科大学放射線科, **第一内科, ***第三内科 |
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| Journal | 核医学 |
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| Volume | 30 |
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| Number | 9 |
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| Page | 1111-1119 |
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| Year/Month | 1993/9 |
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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」 心筋ゲートSPECTの基礎的検討のために健常者ならびに心筋シンチグラフィ上異常のなかった9例に3検出器型SPECT装置で201Tl心筋ゲートSPECTを施行した. 撮像は64×64, 128×128マトリックス, 8, 16, 32フレームと変化させて施行し64×64, 8フレームについては心筋の収縮期, 拡張期に関心領域を設定し, 心筋壁運動の指標としてpercent wall thickening (%WT) を算出した. 他のマトリックス, フレーム数に比べ64×64, 8フレームで収集された画像は, 投影データのカウント数も高く良好な画質で, 心時相の変化もとらえられ, 処理時間も30分程度であった. %WTは心尖部が65±29%ないし68±27%と高く, 他の部位は37±17%から55±13%程度であった. 有意差検定でも1%ないし5%以下の危険率で有意差を認めたことから, 心筋ゲートSPECTでは心筋の各部位別に検討ないし定量化が必要と考えられた. これらの知見は99mTc心筋製剤による心筋ゲートSPECT施行時の参考にもなると考えられる. |
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| Practice | 臨床医学：一般 |
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| Keywords | Myocardial scintigraphy, Multigated SPECT, 201Tl Triple detector SPECT system. |
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| English |
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| Title | A Basic Study of Multi-Gated Single Photon Emission Computed Tomography with Thallium-201 |
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| Subtitle | |
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| Authors | Yasushi SUGIOKA*, Itaru ADACHI*, Kojiro TABUCHI*, Yoshinori SAIKA*, Yoshimitsu TATSU*, Yasunobu NAKATA*, Ryuichiro NAMBA*, Hiroshi NISHIGAKI*, Kozo SUEYOSHI*, Isamu NARABAYASHI*, Shigemi TAMOTO**, Yoshiaki OHTAKE*** |
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| Authors(kana) | |
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| Organization | *First Department of Radiology, **First Department of Internal Medicine, ***Third Department of Internal Medicine, Osaka Medical College |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 30 |
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| Number | 9 |
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| Page | 1111-1119 |
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| Year/Month | 1993/9 |
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| Article | Report |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] A Multi-gated SPECT was acquired commonly in 64×64 matrix and 8 frames per cardiac cycle (64×64/8F) . But it was not established that 64×64 matrix and 8 frames per cardiac cycle were the most suitable in multi-gated SPECT. Five normal volunteers were examined multi-geted 201Tl SPECT with 5 acquisition modes of 128×128 matrix/16 frames, 128×128/8F, 64×64/32F, 64×64/8F using multi-detector SPECT system (GCA-9300) . And we calculated percent wall thickening (%WT) [%WT= (ES counts-ED counts) /ED counts] in 9 cases with 64×64/8F. The images quality of both 128×128/16F and 128×128/8F was not clear in compared with images of both 64×64/16F and 64×64/8F, because the enddiastolic phase of 128×128/16F images showed a decreased uptake of 201Tl in the antero-apical region. Although 64×64 (8) images had only 8 frames per cardiac cycle, we could observe systolic and diastolic phase and we could calculate %WT. The %WT (M+-SD) of horizontal long axis images were 48+-15 (sept. basal) , 48+-19 (sept. apical), 65+-29 (apex) , 49+-22 (lat. apical) and 40+-15 (lat. basal) . The %WT of vertical long axis images were 37+-17 (ant. basal) , 49+-21 (ant. apical) , 68+-27 (apex) , 55+-13 (inf. apical) and 41+-14 (inf. basal) . The %WT of the apex was significantly higher than that of the other segment (p<0.05-0.01) . Thus it is necessary that we compare %WT of each segments to normal vale of these segments, when we evaluate %WT of multi-gated SPECT. Multi-gated SPECT with can be acquired and processed in a short time. The excellent quality of 64×64 (8) images could be acquired. We conclude that multi-gated SPECT of 64×64/8F is the most suitable examination even if the newly developed three detector gamma-camera and computer system have been used. |
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| Practice | Clinical medicine |
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| Keywords | Myocardial scintigraphy, Multigated SPECT, 201Tl Triple detector SPECT system. |
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