Kanzaki Y, Yoshida K, Hozumi T, Akasaka T, Takagi T, Yonezawa Y, Yagi T, Morioka S, Ito H, Yoshioka H, Nishiura M, Watanabe M, Yoshikawa J
Division of Cardiology, Kobe General Hospital.
J Cardiol. 1999 Oct;34(4):207-10.
Recent development of an automated contour tracking (ACT) method using the energy minimization principle provides automated edge detection and tracking of the endocardial boundary of the left ventricle, without tracing a region of interest. This study determined whether left ventricular filling indexes obtained from the ACT method provide a reliable estimate of left ventricular diastolic filling. Fourteen patients were examined by the ACT method and equilibrium radionuclide ventriculography. The volume-time wave form for ACT measurements was obtained from the 4-chamber views. Peak filling rate and time to peak filling rate measured by the ACT method were compared with those determined by radionuclide ventriculography. Peak filling rate and time to peak filling rate by the ACT method were closely correlated with those determined by radionuclide ventriculography (peak filling rate: r = 0.88, y = 0.71x + 0.36, SEE = 0.54 ml/end-diastolic volume/sec, time to peak filling rate: r = 0.89, y = 0.72x + 30.0, SEE = 0.02 msec, respectively) The ACT method is useful for the assessment of left ventricular diastolic filling.
最近利用能量最小化原理开发的自动轮廓跟踪（ACT）方法可实现左心室内膜边界的自动边缘检测和跟踪，而无需描绘感兴趣区域。本研究旨在确定通过ACT方法获得的左心室充盈指标是否能可靠地估计左心室舒张期充盈情况。对14例患者采用ACT方法和平衡放射性核素心室造影进行检查。ACT测量的容积-时间波形取自四腔视图。将ACT方法测量的峰值充盈率和达到峰值充盈率的时间与放射性核素心室造影测定的结果进行比较。ACT方法的峰值充盈率和达到峰值充盈率的时间与放射性核素心室造影测定的结果密切相关（峰值充盈率：r = 0.88，y = 0.71x + 0.36，标准误 = 0.54 ml/舒张末期容积/秒；达到峰值充盈率的时间：r = 0.89，y = 0.72x + 30.0，标准误 = 0.02毫秒）。ACT方法可用于评估左心室舒张期充盈情况。
