Japanese
Title心RIアンジオグラフィによる左室駆出分画 (EF) の精度に関する検討 (I) - First pass法について -
Subtitle原著
Authors西村恒彦*, 今井行雄*, 香川雅昭*, 林真*, 小塚隆弘*
Authors(kana)
Organization*国立循環器病センター放診部
Journal核医学
Volume17
Number1
Page53-58
Year/Month1980/2
Article原著
Publisher日本核医学会
Abstract「要旨」シンチカメラとオンラインで接続したミニコンピュータシステムを用いて, First pass法による心RIアンジオグラフィを施行した. データ収集は1秒間に20フレーム, 最大512フレームまでイメージモードで行なった. 左室駆出分画 (EF) の算出は, 得られた鋸歯状の時系列曲線から山の部分, 谷の部分をおのおのED, ESのカウント数とし3心拍の平均とした. EFの精度については左心室, バックグラウンドの関心領域の設定について検討した結果, 左心室の大きさを正確にかつバックグラウンドは大動脈弁領域を含まないときコントラストEFとよく一致した. First pass法によるEFは心カラーテル検査を施行している20症例にてr=0.89とよく相関した. また, 不整脈を有する15症例でもr=0.84とよく相関した. このことは, First pass法によるEFの算出は左心機能の測定が精度高く行なえルーチンワークに供する上で有用なことが認められた.
Practice臨床医学：一般
KeywordsEjection fraction, First pass method, Contrast X-ray method.
English
TitleEvaluation of Left Ventricular Ejection Fraction by First Pass Radionuclide Cardioangiography
SubtitleOriginal Articles
AuthorsTsunehiko NISHIMURA, Yukio IMAI, Masaaki KAGAWA, Makoto HAYASHI, Takahiro KOZUKA
Authors(kana)
OrganizationDepartment of Nuclear Medicine, National Cardiovascular Center
JournalThe Japanese Journal of nuclear medicine
Volume17
Number1
Page53-58
Year/Month1980/2
ArticleOriginal article
PublisherTHE JAPANESE SOCIETY OF NUCLEAR MEDICINE
Abstract[Summary] : The left ventricular ejection fraction can be assessed by recording the passage of peripherally administreted radioactive bolus through the heart which is first pass method. In this study, the accuracy and validity of first pass method were examined in the patients with cardiac catheterization. After 99mTC-HSA as a bolus was injected intravenouslly, the time-activity curve was recorded with a scintillation camera and online minicomputer system. The ejection fraction was calculated by the average of three cardiac cycles which corresponded to the left ventricular volume changes during each cardiac cycles. The results correlated well with those obtained by biplane cineangiography in the twenty patients without arrythmias (r=0.89) and moerover, this technique was applied to the fifteen patients with atrial fibrillation such as mitral vulvular diseases, congestive cardiomyopathy, Gocd correlation of the ejection fraction (r=0.84) was obtained. The findings, however, demonstrated that the time-activity curve must be generated from the region of interest which fits the left ventricular blood pool precisely and must be corrected for the contribution arizing from noncardiac background structures (two matrix method) . In conclusion, this noninvasive method appears particulary useful for serial evaluation of the patients with cardiac dysfunctions and would be available for the routine examination of ventricular functions.
PracticeClinical medicine
KeywordsEjection fraction, First pass method, Contrast X-ray method.

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