Choi Sang Il, George Richard T, Schuleri Karl H, Chun Eun Ju, Lima Joao A C, Lardo Albert C
Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, 720 Rutland Ave./1042 Ross Building, Baltimore, MD 21205, USA.
Int J Cardiovasc Imaging. 2009 Apr;25 Suppl 1:23-9. doi: 10.1007/s10554-009-9443-4. Epub 2009 Mar 3.
Multidetector computed tomography (MDCT) using 64 detectors is widely used for cardiac imaging in the clinical setting. Despite promising results, 64-slice MDCT has important limitations for cardiac applications related to detector coverage, which leads to longer scan times, image artifacts, increased radiation and the need for higher contrast doses. The advent of wide or full cardiac coverage with 256- or 320-slice MDCT provides important advantages that can potentially improve the status of these limitations and expand the utility of cardiac MDCT imaging beyond coronary imaging. Additionally, the combination of wide-detectors and multi-energy acquisitions offer interesting possibilities of improved coverage and temporal resolution that may improve plaque characterization as well as viability and perfusion imaging. In this review we will discuss the current status of wide-detector MDCT scanners and their advantages for clinical coronary and ventricular imaging. We will also review examples of wide detector coronary angiography imaging and discuss emerging complementary non-coronary applications that have been enabled by wide-detector MDCT imaging.
使用64层探测器的多排螺旋计算机断层扫描（MDCT）在临床中广泛用于心脏成像。尽管取得了令人鼓舞的结果，但64层MDCT在心脏应用方面存在与探测器覆盖范围相关的重要局限性，这导致扫描时间延长、图像伪影、辐射增加以及需要更高的对比剂剂量。256层或320层MDCT实现的宽视野或全心覆盖带来了重要优势，有可能改善这些局限性，并将心脏MDCT成像的应用范围扩展到冠状动脉成像之外。此外，宽探测器和多能量采集的结合提供了改善覆盖范围和时间分辨率的有趣可能性，这可能会改善斑块特征以及心肌存活性和灌注成像。在这篇综述中，我们将讨论宽探测器MDCT扫描仪的现状及其在临床冠状动脉和心室成像中的优势。我们还将回顾宽探测器冠状动脉造影成像的实例，并讨论宽探测器MDCT成像所带来的新兴互补性非冠状动脉应用。
