Reimann Anja J, Rinck Daniel, Birinci-Aydogan Ayser, Scheuering Michael, Burgstahler Christof, Schroeder Stephen, Brodoefel Harald, Tsiflikas Ilias, Herberts Tina, Flohr Thomas, Claussen Claus D, Kopp Andreas F, Heuschmid Martin
Department of Diagnostic Radiology, Eberhard-Karls-University of Tuebingen, Tuebingen, Germany.
Invest Radiol. 2007 Mar;42(3):196-203. doi: 10.1097/01.rli.0000254409.79193.96.
The aim of this study was to quantify image quality gains of a moving coronary plaque phantom using dual-source computed tomography (DSCT) providing 83 milliseconds temporal resolution in direct comparison to 64 slice single-source multidetector CT (MDCT) with a temporal resolution of 165 milliseconds.
Three cardiac vessel phantoms with fixed 50% stenosis and changing plaque configurations were mounted on a moving device simulating cardiac motion. Scans were performed at a simulated heart frequency of 60 to 120 bpm. Image quality assessment was performed in different anatomic orientations inside a thoracic phantom.
A significant improvement of image quality using the DSCT could be found (P=0.0002). Relevant factors influencing image quality aside from frequency (P=0.0002) are plaque composition (P<0.0001), as well as orientation (P<0.0001).
Scanning with 83 milliseconds temporal resolution improved image quality of coronary plaque at higher heart frequencies.
本研究旨在通过提供83毫秒时间分辨率的双源计算机断层扫描（DSCT），直接与时间分辨率为165毫秒的64层单源多探测器CT（MDCT）比较，量化移动冠状动脉斑块模型的图像质量提升情况。
将三个具有固定50%狭窄且斑块形态不断变化的心脏血管模型安装在模拟心脏运动的移动装置上。以60至120次/分钟的模拟心率进行扫描。在胸部模型内的不同解剖方向上进行图像质量评估。
使用DSCT可发现图像质量有显著改善（P = 0.0002）。除频率（P = 0.0002）外，影响图像质量的相关因素包括斑块成分（P < 0.0001）以及方向（P < 0.0001）。
以83毫秒时间分辨率进行扫描可提高较高心率下冠状动脉斑块的图像质量。
