| Japanese |
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| Title | 心電同期心筋SPECTでの左心室容積, 駆出率の算出 - Threshold法による心内壁自動抽出 - |
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| Subtitle | 《原著》 |
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| Authors | 福士彰二*, 寺岡悟見** |
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| Organization | *黒石市国民健康保険黒石病院放射線部, **GE横河メディカルシステム (株) |
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| Journal | 核医学 |
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| Volume | 34 |
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| Number | 1 |
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| Page | 1-6 |
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| Year/Month | 1997/1 |
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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」99mTc心筋血流製剤を使用した心電同期心筋SPECT(G-SPECT)の短軸断層像から左心室の拡張末期容積(EDV), 収縮末期容積(ESV), および, 駆出率(LVEF)を算出する方法を考案した. 1心拍を8分割した180度G-SPECTを行い, Threshold法により拡張末期像と収縮末期像の心内壁を自動抽出した. ファントム実験を実施し最適Threshold値45%を得た. 本法の妥当性を評価するため, GSPECTの前後10日以内に左室造影(LVG)を施行できた患者12名に対する相関を求めた. LVGとの相関は相関係数0.918(EDV), 0.935(ESV), 0.900(LVEF)であった. 本法は心内壁を自動抽出しているため, 客観性と再現性に優れ, 心筋血流分布と心機能の同時評価が簡便に行えると考えられた. |
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| Practice | 臨床医学：一般 |
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| Keywords | 99mTc-MIBI, 99mTc-tetrofosmin, ECG-gated SPECT, Short axis, Threshold. |
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| English |
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| Title | Calculation of Left Ventricular Volume and Ejection Fraction from ECG-Gated Myocardial SPECT : Automatic Detection of Endocardial Borders by Threshold Method |
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| Subtitle | - Original Articles - |
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| Authors | Shoji FUKUSHI*, Satomi TERAOKA** |
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| Organization | *Department of Radiology, Kuroishi Municipal Hospital, **GE Yokogawa Medical Systems, Ltd. |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 34 |
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| Number | 1 |
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| Page | 1-6 |
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| Year/Month | 1997/1 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | A new method which calculate end-diastolic volume (EDV), end-systolic volume (ESV) and ejection fraction (LVEF) of the left ventricle from myocardial short axis images of ECG-gated SPECT using 99mTc myocardial perfusion tracer has been designed. Eight frames per cardiac cycle ECG-gated 180 degrees SPECT was performed. Threshold method was used to detect myocardial borders automatically. The optimal threshold was 45% by myocardial SPECT phantom. To determine if EDV, ESV and LVEF can also be calculated by this method, 12 patients were correlated ventriculography (LVG) for 10 days each. The correlation coefficient with LVG was 0.918 (EDV), 0.935 (ESV) and 0.900 (LVEF). This method is excellent at objectivity and reproductivity because of the automatic detection of myocardial borders. It also provides useful information on heart function in addition to myocardial perfusion. |
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| Practice | Clinical medicine |
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| Keywords | 99mTc-MIBI, 99mTc-tetrofosmin, ECG-gated SPECT, Short axis, Threshold. |
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