Barnwell J D, Smith J K, Castillo M
Section of Neuroradiology, Department of Radiology, University of North Carolina Healthcare, Chapel Hill, NC, USA.
AJNR Am J Neuroradiol. 2007 Apr;28(4):790-1.
In this retrospective review, we demonstrate the utility of using a commercially available gated navigator sequence (prospective acquisition correction technique [PACE]) to reduce rhythmic breathing motion on brain MR images. For purposes of this report, we studied 2 sedated patients who had marked head rocking, one due to deep breathing and snoring and the other due to ventilator support. Motion degraded the routine images, which, despite a short acquisition time, were nondiagnostic. After application of PACE, a technique commonly used in abdominal studies, the brain images in both patients were judged to be of acceptable diagnostic quality. The use of PACE to diminish head motion is now routine at our institution when sedated or ventilated patients degrade images with involuntary head rocking.
在这项回顾性研究中，我们展示了使用商用门控导航序列（前瞻性采集校正技术[PACE]）来减少脑部磁共振成像上的节律性呼吸运动的效用。为撰写本报告，我们研究了2名头部有明显摆动的镇静患者，其中1名是由于深呼吸和打鼾，另1名是由于呼吸机支持。运动使常规图像质量下降，尽管采集时间很短，但这些图像仍无法用于诊断。在应用腹部研究中常用的PACE技术后，两名患者的脑部图像均被判定具有可接受的诊断质量。当镇静或使用呼吸机的患者因不自主头部摆动而使图像质量下降时，在我们机构使用PACE减少头部运动现已成为常规操作。
