Grass M, Manzke R, Nielsen T, Koken P, Proksa R, Natanzon M, Shechter G
Philips Research Laboratories, Sector Technical Systems, Roentgenstr. 24-26, D-22335 Hamburg, Germany.
Phys Med Biol. 2003 Sep 21;48(18):3069-84. doi: 10.1088/0031-9155/48/18/308.
In modern computer tomography (CT) systems, the fast rotating gantry and the increased detector width enable 3D imaging of the heart. Cardiac volume CT has a high potential for non-invasive coronary angiography with high spatial resolution and short scan time. Due to the increased detector width, true cone beam reconstruction methods are needed instead of adapted 2D reconstruction schemes. In this paper, the extended cardiac reconstruction method is introduced. It integrates the idea of retrospectively gated cardiac reconstruction for helical data acquisition into a cone beam reconstruction framework. It leads to an efficient and flexible algorithmic scheme for the reconstruction of single- and multi-phase cardiac volume datasets. The method automatically adapts the number of cardiac cycles used for the reconstruction. The cone beam geometry is fully taken into account during the reconstruction process. Within this paper, results are presented on patient datasets which have been acquired using a 16-slice cone beam CT system.
在现代计算机断层扫描（CT）系统中，快速旋转的机架和增加的探测器宽度使得心脏的三维成像成为可能。心脏容积CT在无创冠状动脉造影方面具有很高的潜力，具有高空间分辨率和短扫描时间。由于探测器宽度的增加，需要采用真正的锥束重建方法，而不是适应性的二维重建方案。本文介绍了扩展心脏重建方法。它将螺旋数据采集中回顾性门控心脏重建的思想集成到锥束重建框架中。它导致了一种高效且灵活的算法方案，用于重建单相和多相心脏容积数据集。该方法会自动调整用于重建的心动周期数量。在重建过程中充分考虑了锥束几何形状。本文展示了使用16层锥束CT系统采集的患者数据集的结果。
