| Japanese |
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| Title | 心電図同期心プールシンチグラフィを用いたfunctional imagingによる心機能評価 (I) - 心室容積曲線のシミュレーションによるフーリエ解析法の検討 - |
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| Subtitle | 原著 |
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| Authors | 中嶋憲一* |
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| Organization | *金沢大学医学部核医学教室 |
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| Journal | 核医学 |
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| Volume | 20 |
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| Number | 1 |
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| Page | 1-10 |
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| Year/Month | 1983/2 |
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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を用いたフーリエ解析によるfunctional imageについて, データ収集条件, 不整脈, 時間軸スムージングなどの因子が, 基本波の位相, 振幅に及ぼす影響を検討した. 容積曲線は三角関数またはその合成に統計変動をのせて作製し, フーリエ解析法のシミュレーションを行った. この結果, 収集時のデータ点数が位相値に与える影響は少なく, 収集時間がより大きな因子となることを示した. また1心拍16フレームでも十分であり, 心負荷など短時間のデータ収集でも信頼性の高い値が得られることが判った. 駆出分画が低値となると位相値の変動は大きくなった. 時間軸スムージングは不適当であった. 不整脈の混入は位相を偏位させ, 振幅を過小評価した. Functional imageの作製, 判定には, これらの因子を十分考慮する必要がある. |
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| Practice | 臨床医学：一般 |
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| Keywords | Fourier analysis, Volume curve, Gated blood pool study, Functional image |
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| English |
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| Title | Assessment of Cardiac Performance by Functional Imaging of Gated Blood Pool Scintigram (I) : A Simulation Study on Fourier Analysis of Volume Curve |
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| Subtitle | Original Articles |
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| Authors | Ken'ichi NAKAJIMA |
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| Authors(kana) | |
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| Organization | Department of Nuclear Medicine, School of Medicine, Kanazawa University |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 20 |
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| Number | 1 |
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| Page | 1-10 |
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| Year/Month | 1983/2 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] A simulation program was developed to assess the accuracy and validity of Fourier analysis in gated blood pool scintigraphy. Volume curves were simulated using sinusoidal function and statistical variations were added on them. Then phase and amplitude were calculated in each volume curve and compared with theoretical value. The number of datapoints during data acquisition did not affect the value of phase but data acquisition time did largely. Sixteen frames per cardiac cycle and short data acquisition time such as in stress study can provide reliable values of phase and amplitude. Low ejection fraction caused larger statistical variation. Temporal smoothing of volume curve was inadequate. In simulation of arrhythmia, phase was overestimated or underestimated according to the patterns of volume curves. In the assessment of cardiac function with functional images, it is important to take into account that above-mentioned factors affect the values of phase and amplitude. |
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| Practice | Clinical medicine |
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| Keywords | Fourier analysis, Volume curve, Gated blood pool study, Functional image |
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