心電図同期心臓CTによる左心室壁運動の解析 : ソフトウェアの検討

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ECG gated cardiac computed tomography (cardiac CT) has often been used recently as one of the highly useful techniques for examining the cardiac function. The software described in this paper was utilised to examine the left ventricular wall motion using the cardiac C.T. The equipment used for the cardiac CT was SOMATOM 2 (SIEMENS) equipped for dynamic scanning with a 5 sccond scan time and a 6 second interscan delay. Cardiac CT was performed after intravenous administration of a 50 cc bolus injection which is the usual contrast medium used in cardiac CT. Boundary detection of the left ventricle from the cardiac CT was carried out by the single thresholding. From the extracted binary left ventricle images the following image processings were done : (1) The changing left ventricular areas and the changing ratios of the left ventricle were calculated and displayed graphically. (2) The regional wall motion curves of the left ventricle during a cardiac cycle were displayed graphically. (3) The subtraction imgae with maximum area image and minimum area image was displayed on a CRT. (4) The motion of the extracted left ventricle image was displayed on a CRT as a moving picture. (5) The changing left ventricle was reconstructed and displayed as a shaded 3 dimensional image. With the use of the system and the software described in this paper, we can grasp the movement of the left ventricle exactly and evaluate the cardiac function quantitatively.
公益社団法人日本放射線技術学会の論文
1983-01-01

心電図同期心臓CTによる左心室壁運動の解析 : ソフトウェアの検討

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