Merkle Elmar M, Dale Brian M
Department of Radiology, Duke University Medical Center, Duke North, Rm. 1417, Box 3808, Erwin Rd., Durham, NC 27710, USA.
AJR Am J Roentgenol. 2006 Jun;186(6):1524-32. doi: 10.2214/AJR.05.0932.
The purpose of our article is to describe the underlying physics concepts of abdominal MRI at 3.0 T and their impact on signal-to-noise ratio, susceptibility artifacts, chemical shift artifacts, and dielectric effects.
Abdominal MR sequence protocols optimized for 1.5-T scanners should not be transferred to 3.0 T without substantial modification. In addition, specific patient groups--for example, large patients with ascites--are not well suited to undergo an abdominal MRI study at 3.0 T.
我们这篇文章的目的是描述3.0 T腹部MRI的基础物理概念及其对信噪比、磁化率伪影、化学位移伪影和介电效应的影响。
为1.5 T扫描仪优化的腹部MR序列方案未经大幅修改不应直接应用于3.0 T。此外，特定患者群体，如患有腹水的肥胖患者，不太适合在3.0 T下进行腹部MRI检查。
