| Japanese |
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| Title | Frame Count Normalization法による心プールシンチの心房細動例の検討 |
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| Subtitle | 原著 |
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| Authors | 茜部寛*, 大島統男*, 佐久間貞行* |
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| Authors(kana) | |
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| Organization | *名古屋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 | 7 |
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| Page | 605-613 |
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| Year/Month | 1988/7 |
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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」心電図同期心プールシンチグラフィ (以下, 心プールシンチ) において, 心房細動例はRR間隔が不規則なため, 駆出率などの心室機能指標の信頼性は確立されていない. そこで筆者らは, 心房細動例の左室機能評価のため, 心プールシンチのデータ処理において, 収縮初期容積を一定にするためにフレームモード法を用い, 先行するRR間隔の一定範囲内のみ収集し, また後半フレームにおいて減少した収集時間を補正するためframe count normalization (FCN) 法を応用し, 解析した. 対象は心房細動例12例で, 全症例につき弁膜疾患の術前後に心プールシンチを施行した. 心プールシンチはフレームモードで収集し, 平均心拍±10%を超える次の1心拍はスキップした. 1心拍を32フレームに分割し, 各フレームごとにトータルカウント値を求めた. 次に後1/3の各フレームのピクセルごとのカウント値を積算し, 前2/3フレームのトータルカウント値の平均と等しくなるようにFCN処理した. FCN処理にて後半フレームの収集時間の減少によるカウント低下を補正でき, またX線左室造影ともよく一致し (r=0.76) . 心機能を評価できた. 左室容積曲線の3次項フーリエ近似はよくフィットした. 本法により容易に心房細動例の心機能を評価できた. |
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| Practice | 臨床医学：一般 |
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| Keywords | Atrial fibrillation, ECG gated blood pool scintigraphy, Frame count normalization method. |
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| English |
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| Title | Evaluation of Left Ventricular Function in Patients with Atrial Fibrillation by ECG Gated Blood Pool Scintigraphy - Using Frame Count Normalization Method - |
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| Subtitle | Original Articles |
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| Authors | Hiroshi AKANABE, Motoo OSHIMA, Sadayuki SAKUMA |
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| Authors(kana) | |
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| Organization | Department of Radiology, School of Medicine, Nagoya University |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 25 |
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| Number | 7 |
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| Page | 605-613 |
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| Year/Month | 1988/7 |
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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 assumption necessary to perform ECG gated blood pool scintigraphy (EGBPS) are seemingly not valid for patients with atrial fibrillation (af) , since they have wide variability in cardiac cycle length. The data were acquired in frame mode within the limits of mean heart rate to fix the first diastolic volume, and were calculated by frame count normalization (FCN) method to correct total counts in each frame. EGBPS were performed twelve patients with af, who were operated against valvular disease. The data acquired within mean heart rate +-10% in frame mode were divided to 32 frames, and calculated total frame counts. With FCN method total frame counts from at 22nd to 32nd frame were multiplied to be equal to the average of total frame counts. FCN method could correct total frame counts at the latter frames. And there was good correlation between left ventricular ejection fraction calculated from scintigraphy and that from contrast cineangiography. Thus EGBPS with FCN method may be allow estimation of cardiac function even in subjects with af. |
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| Practice | Clinical medicine |
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| Keywords | Atrial fibrillation, ECG gated blood pool scintigraphy, Frame count normalization method. |
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