| Japanese |
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| Title | 左心室駆出率測定の簡易化, 自動化のための一考案 |
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| Subtitle | 原著 |
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| Authors | 稲垣末次*, 足立晴彦*, 杉原洋樹*, 勝目紘*, 伊地知浜夫*, 岡本邦雄**, 細羽実*** |
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| Organization | *京都府立医科大学第二内科, **RI室, ***島津製作所 |
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| Journal | 核医学 |
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| Volume | 21 |
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| Number | 12 |
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| Page | 1613-1620 |
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| Year/Month | 1984/12 |
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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」平衡時心電図同期心プール法による左心室駆出率 (LVEF) 算出において, 関心領域 (ROI) を必要としない新しいバックグランド (BKG) 処理方法を考案し (Fixed BKG ratio法), 心疾患患者および正常者計30名を対象に, 観血的左心室造影法 (LVG) で求めたEFを基準として, 精度, 再現性について, BKG-ROIを用いる従来の方法と比較検討した. BKGを左心室拡張終期カウント数の64%とした時, LVGと最も良く相関 (r = 0.936) するとともに近似値をとり (LVG-EF 61.2±21.4%, Fixed BKG ratio EF 61.1±20.1% (Mean±SD)), 他法よりEF過小評価傾向が是正され, 再現性も良好であった. Fixed BKG ratio法は難解とされるBKG処理の一方法として有用であり, EF算出処理が簡略化されるため, 自動処理への応用やROI設定の困難なシングルプローブシステムへの応用が期待できる. |
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| Practice | 臨床医学：一般 |
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| Keywords | ECG gated blood pool scintigraphy, Left ventricular ejection fraction, Background, Radionuclide |
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| English |
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| Title | A New Approach for Simplified and Automated Measurement of Left Ventricular Ejection Fraction by ECG Gated Blood Pool Scintigraphy |
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| Subtitle | Original Articles |
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| Authors | Suetsugu INAGAKI*, Haruhiko ADACHI*, Hiroki SUGIHARA*, Hiroshi KATSUME*, Hamao IJICHI*, Kunio OKAMOTO*, Minoru HOSOBA** |
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| Authors(kana) | |
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| Organization | *Second Department of Internal Medicine, Kyoto Prefectural University of Medicine, **Medical Systems Division, Shimadzu Corporation |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 21 |
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| Number | 12 |
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| Page | 1613-1620 |
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| Year/Month | 1984/12 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] Background (BKG) correction is important but debatable in the measurement of Left ventricular ejection fraction (LVEF) with ECG gated blood pool scintigraphy. We devised a new simplified BKG processing (fixed BKG method) without BKG region-of-interest (ROI) assignment, and the accuracy and reproducibility were assessed in 25 patients with various heart diseases and 5 normal subjects by comparison with LVEF obtained by contrast levolgraphy (LVG-EF). Four additional protocols for LVEF measurement with BKG-ROI assignment were also assessed for reference. LVEF calculated using the fixed BKG ratio of 0.64 (BKG count rates were 64%) of end-diastolic count rates of LV) with "Fixed" LV-ROI was best correlated with LVG-EF (r = 0.936, P<0.001) and most approximated (Fixed BKG ratio method EF: 61.1 +- 20.1, LVG-EF: 61.2+-20.4% (mean+-SD)) among other protocols. The wide availability of the fixed value of 0.64 was tested in various diseases, body size and end-diastolic volume by LVG, and the results were to be little influenced by them. Furthermore, fixed BKG method produced lower inter-and intra- observer variability than other protocols requiring BKG-ROI assignment, probably due to its simplified processing. In conclusion, fixed BKG ratio method simplifies the measurement of LVEF, and is feasible for automated processing and single probe system. |
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| Practice | Clinical medicine |
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| Keywords | ECG gated blood pool scintigraphy, Left ventricular ejection fraction, Background, Radionuclide |
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