Manzke R, Grass M, Nielsen T, Shechter G, Hawkes D
Philips Research Laboratories, Sector Technical Systems, Hamburg, Germany and Imaging Sciences Group, Guy's Hospital Campus, KCL, London, United Kingdom.
Med Phys. 2003 Dec;30(12):3072-80. doi: 10.1118/1.1624756.
Cone beam computed tomography scanners in combination with heart rate adaptive reconstruction schemes have the potential to enable cardiac volumetric computed tomography (CT) imaging for a larger number of patients and applications. In this publication, an adaptive scheme for the automatic and patient-specific reconstruction optimization is introduced to improve the temporal resolution and image quality. The optimization method permits the automatic determination of the required amount of gated helical cone beam projection data for the reconstruction volume. It furthermore allows one to optimize subvolume reconstruction yielding an increased temporal resolution. In addition, methods for the assessment of the temporal resolution are given which enable a quantitative documentation of the reconstruction improvements. Results are presented for patient data sets acquired in low pitch helical mode using a 16-slice cone beam CT system with parallel ECG recording.
锥形束计算机断层扫描扫描仪与心率自适应重建方案相结合，有潜力使更多患者和应用能够进行心脏容积计算机断层扫描（CT）成像。在本出版物中，引入了一种用于自动且针对患者的重建优化的自适应方案，以提高时间分辨率和图像质量。该优化方法允许自动确定重建容积所需的门控螺旋锥形束投影数据量。此外，它还能优化子容积重建，从而提高时间分辨率。此外，还给出了评估时间分辨率的方法，这些方法能够对重建改进进行定量记录。文中展示了使用16层锥形束CT系统并同步记录心电图，以低螺距螺旋模式采集的患者数据集的结果。
