| Japanese |
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| Title | 心拍同期・非同期心プールSingle Photon Emission Computed Tomographyによる左室拡張末期容積算出に関する基礎的ならびに臨床的検討 |
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| Subtitle | 原著 |
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| Authors | 木村元政* |
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| Authors(kana) | |
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| Organization | *新潟大学医学部放射線科 |
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| Journal | 核医学 |
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| Volume | 25 |
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| Number | 6 |
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| Page | 493-504 |
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| Year/Month | 1988/6 |
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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」 心拍同期SPECTおよび非同期SPECTから左室拡張末期容積を算出する場合の心内腔輪郭を決定するために用いるカットオフ値 (C) について, 心臓動態ファントムを用いて基礎的検討を行った. 心拍同期SPECT (G-SPECT) では, 心腔内最高カウント・サンプリング時間・駆出率ともにあまりカットオフ値に影響を与えなかったが, バックグラウンド (BG) との間にはC = 0.69BG + 32.5 (%) (r = 0.997) の相関が認められた. 心拍非同期SPECT (NG-SPECT) では, バックグラウンドとの間にC = 0.79BG + 22.7 (%) (r = 0.998) の相関があり, また駆出率 (EF) との間にもC = -0.169EF + 36.4 (%) (r = -0.97) の相関が認められた. 各種心疾患13例でSPECTによりおのおのの最適カットオフ値で算出した容積は, 左室造影 (LVG) から求めた左室拡張末期容積とはG-SPECT = 1.06LVG - 15.3 (ml) (r = 0.97), NG-SPECT = 1.15LVG - 26.5 (ml) (r = 0.96) の良い相関を示した. しかしカットオフ値を心拍同期SPECTで45%, 心拍非同期SPECTで40%と一定にしてもそれぞれ左室造影との相関はG-SPECT = 1.03LVG - 1.4 (ml) (r = 0.97) , NG-SPECT = 1.01LVG - 3.7 (ml) (r = 0.98) と良好であり, 方法が簡単なことからカットオフ値を一定にして容積を算出しても臨床上は十分であると思われた. |
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| Practice | 臨床医学：一般 |
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| Keywords | Left ventricular end-diastolic volume, Gated SPECT, Non-gated SPECT, Optimal cut off level, Dynamic cardiac phantom |
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| English |
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| Title | Basic and Clinical Study on the Measurement of Left Ventricular End-diastolic Volume Using ECG-gated and Non-gated Single Photon Emission Tomography |
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| Subtitle | Original Articles |
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| Authors | Motomasa KIMURA |
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| Authors(kana) | |
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| Organization | Department of Radiology, Niigata University School of Medicine |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 25 |
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| Number | 6 |
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| Page | 493-504 |
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| Year/Month | 1988/6 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] The optimal cut off level (C) for the measurement of left ventricular end-diastolic volume using ECG-gated single photon emission computed tomography (G-SPECT) and non-gated SPECT (NG-SPECT) was evaluated by using a dynamic cardiac phantom. In G-SPECT, the optimal cut off level was not affected significantly by the maximum count in the chamber, frame duration and ejection fraction. However, it had linear correlation with background level (BG) : C = 0.69BG + 32.5 (%) , r = 0.997. In NG-SPECT, the optimal cut off level had linear correlation with background level : C = 0.79BG + 22.7 (%) , r = 0.998, and it had also linear correlation with ejection fraction (EF) : C = -0.169EF + 36.4 (%) , r = -0.97. The optimal cut off level in NG-SPECT was therefore determined by the following equation : C = 0.79BG + 22.7 + 0.169 (60-EF) . G-SPECT volume and NG-SPECT volume were compared with biplane contrast left ventriculography (LVG) in 13 patients. G-SPECT volume and NG-SPECT volume using optimal cut off level correlated well with those determined by LVG. However, G-SPECT volume using constant cut off level of 45% and NG-SPECT volume using constant cut off level of 40% correlated with LVG too. |
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| Practice | Clinical medicine |
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| Keywords | Left ventricular end-diastolic volume, Gated SPECT, Non-gated SPECT, Optimal cut off level, Dynamic cardiac phantom |
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