超短TE多层梯度回波磁共振图像中的主动脉伪影不会因顺磁性增强而增加。

Aortic ghost artifact in ultrashort TE multislice gradient echo MR images is not increased by paramagnetic enhancement.

作者信息

Mitchell D G, Ortega H, Mohamed F, Tascyian T, Vinitski S

机构信息

Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania.

出版信息

Magn Reson Med. 1993 Feb;29(2):269-72. doi: 10.1002/mrm.1910290219.

DOI:10.1002/mrm.1910290219

PMID:8429795

Abstract

Pulsation artifact on gradient echo images with ultrashort TE (i.e., < 3 msec) and intermediate TR is primarily from view-to-view amplitude modulation. Paramagnetic contrast agents increase the signal from blood during diastole without increasing the intensity of unsaturated systolic blood, decreasing signal modulation between systole and diastole. In a phantom and in humans, artifact decreased or remained the same following contrast enhancement.

摘要

在具有超短回波时间（即<3毫秒）和中等重复时间的梯度回波图像上，搏动伪影主要源于不同视图间的幅度调制。顺磁性造影剂在舒张期增加血液信号，而不增加未饱和收缩期血液的强度，从而减少收缩期和舒张期之间的信号调制。在模型和人体中，造影剂增强后伪影减少或保持不变。