Department of Diagnostic Radiology, Peng Hu Hospital, Ministry of Health and Welfare, Taiwan Department of Biomedical Imaging and Radiological Science, China Medical University, Taiwan.
Department of Medical Imaging and Radiological Sciences, I-Shou University, Taiwan.
J Xray Sci Technol. 2014;22(1):129-36. doi: 10.3233/XST-130414.
Ventricular hemodynamics plays an important role in assessing cardiac function in clinical practice. The aim of this study was to determine the ventricular hemodynamics based on contrast movement in the left ventricle (LV) between the phases in a cardiac cycle recorded using an electrocardiography (ECG) with cardiac computed tomography (CT) and optical flow method. Cardiac CT data were acquired at 120 kV and 280 mA with a 350 ms gantry rotation, which covered one cardiac cycle, on the 640-slice CT scanner with ECG for a selected patient without heart disease. Ventricular hemodynamics (mm/phase) were calculated using the optical flow method based on contrast changes with ECG phases in anterior-posterior, lateral and superior-inferior directions. Local hemodynamic information of the LV with color coating was presented. The visualization of the functional information made the hemodynamic observation easy.
心室血液动力学在临床实践中评估心脏功能方面起着重要作用。本研究旨在使用心电图（ECG）与心脏计算机断层扫描（CT）和光流法记录的心动周期相位之间的对比运动来确定左心室（LV）的心室血液动力学。对一名无心脏病的选定患者，在 640 层 CT 扫描仪上以 120 kV 和 280 mA 的管电流，350 ms 机架旋转速度采集覆盖一个心动周期的心脏 CT 数据。使用光流法基于心电图相位在前后、左右和上下方向上的对比度变化计算心室血液动力学（mm/相位）。用彩色涂层呈现 LV 的局部血液动力学信息。功能信息的可视化使血液动力学观察变得容易。
