X-ray pulsing methods for reduced-dose computed tomography in PET/CT attenuation correction
X-ray pulsing methods for reduced-dose computed tomography in PET/CT attenuation correction
复制标题
PET/CT 衰减校正中减少剂量计算机断层扫描的 X 射线脉冲方法
DOI：
--
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
B. De Man
中科院分区：
文献类型：
--
作者：
U. Wiedmann;V. Neculaes;D. Harrison;E. Asma;Paul Kinahan;B. De Man
基于CT的衰减校正(CTAC)所需的图像质量明显低于目前用于诊断性CT成像的图像质量。因此，CTAC获得足够图像质量所需的X射线剂量相对较小，可能低于临床CT扫描仪所能提供的最低X射线剂量。已经提出了在扫描期间周期性地打开和关闭X射线以减少X射线剂量的操作模式。本研究回顾了在CT扫描仪中调制X射线的不同方法，并评估了它们对于CTAC所需的低剂量采集的充分性。文中提供了计算和实验数据，以举例说明选定的X射线脉冲情况。我们的分析表明，低剂量脉冲是可能的，但对临床上可用的CT管来说是有挑战性的。替代的X射线管设计将取消这一限制。
The image quality needed for CT-based attenuation correction (CTAC) is significantly lower than what is used currently for diagnostic CT imaging. Consequently, the X-ray dose required for sufficient image quality with CTAC is relatively small, potentially smaller than the lowest X-ray dose clinical CT scanners can provide. Operating modes have been proposed in which the X-rays are periodically turned on and off during the scan in order to reduce X-ray dose. This study reviews the different methods by which X-rays can be modulated in a CT scanner, and assesses their adequacy for lowdose acquisitions as required for CTAC. Calculations and experimental data are provided to exemplify selected X-ray pulsing scenarios. Our analysis shows that low-dose pulsing is possible but challenging with clinically available CT tubes. Alternative X-ray tube designs would lift this restriction.
影响因子：
3.8
作者：
Kinahan, PE;Townsend, DW;Sashin, D
通讯作者：
Sashin, D