| Japanese |
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| Title | 心拍同期心プール断層法における位相解析 - 心ファントームによる基礎的検討ならびに臨床応用 - |
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| Subtitle | 原著 |
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| Authors | 津田隆俊*, 久保田昌宏*, 高橋貞一郎*, 森田和夫* |
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| Organization | *札幌医科大学医学部放射線医学講座 |
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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 | 543-555 |
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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」 心拍同期心プール断層法 (Pool SPECT) は, 局所壁運動の三次元的解析法として臨床面での貢献が期待される. 今回われわれは, 心ファントームを用いて, 心拍同期心プール断層法にFourier解析を応用する際のデータ収集, 解析条件を検討した. 位相解析像をもとに, 収集カウント, 収集範囲, 収集方向数, 時間分解能, 臓器辺縁の描出のためのcut-off level, 解析次数を検討し, さらに, 基礎実験で得られた至適条件を用いて臨床応用を試みた. 対象は, 陳旧性心筋梗塞患者19例 (梗塞部位 : 55か所) で, 201T1-SPECTにて同定された心筋梗塞に伴う壁運動異常の本法による検出率ならびに左室壁運動の評価に関して本法とX線左室造影法との一致率を検討した. 心筋梗塞に伴う壁運動異常の検出率は, sensitivity 48/55 (87%) , specificity 46/59 (78%) , accuracy 94/114 (82%) であった. 左室造影法との比較で, 壁運動評価に関する両者の一致率は, 107/114 (93.9%) と高率であった. 心拍同期心プール断層法の位相解析像は, 客観的な局所壁運動の三次元的評価法として有用な方法と考えられた. |
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| Practice | 臨床医学：一般 |
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| Keywords | Gated pool SPECT, Fourier analysis, Phantom study, Old myocardial infarction |
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| English |
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| Title | Fourier Analysis in ECG Gated Blood Pool Emission Computed Tomography - A Basic Study Using Cardiac Phantoms and its Clinical Application - |
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| Subtitle | Original Articles |
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| Authors | Takatoshi TSUDA, Masahiro KUBOTA, Teiichiro TAKAHASHI, Kazuo MORITA |
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| Organization | Department of Radiology, Sapporo Medical College |
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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 | 543-555 |
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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] Using a rotating gamma camera system with a high-resolution parallel hole collimator, application of Fourier analysis to gated blood pool emission computed tomography (gated pool SPECT) with cardiac phantoms was carried out. The evaluation of wall motion abnormalities of 19 patients with old myocardial infarction (OMI) was examined. The obtained images were filtered for space high frequency noise by means of a weighted 9-point smoothing. In gated pool SPECT, a series of transverse view tomograms was reconstructed by means of Shepp and Logan's filtered back projection method in every 6 mm slice. From the processed data the functional images of the first and higher order compornents of the temporal Fourier transform were obtained. Through these functional images, the conditions of data acquisition and processing were examined. From the results of phantom study, the clinical application of gated pool SPECT was carried out in order to evaluate three dimensional wall motion abnormalities of the 19 patients of OMI (55 infarct sites) . This gated pool SPECT method was similar to the left ventriculography method in superiority for detection of wall motion abnormality sites. The wall motion could be evaluated three dimensionally from functional images derived from Fourier analysis of gated pool SPECT reorganized images (sagittal, coronal and 4-chamber images) . |
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| Practice | Clinical medicine |
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| Keywords | Gated pool SPECT, Fourier analysis, Phantom study, Old myocardial infarction |
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