减法成像：非血管性腹部磁共振成像的应用
Subtraction imaging: applications for nonvascular abdominal MRI.
作者信息
Newatia Amit, Khatri Gaurav, Friedman Barak, Hines John
机构信息
Department of Radiology, Long Island Jewish Medical Center, 270-05 76th Ave., New Hyde Park, NY 11040, USA.
出版信息
AJR Am J Roentgenol. 2007 Apr;188(4):1018-25. doi: 10.2214/AJR.05.2182.
OBJECTIVE
In this article we will illustrate the role of subtraction imaging for abdominal MRI applications.
CONCLUSION
Subtraction imaging has multiple applications for imaging the mediastinum, abdomen, and pelvis. Removing any preexisting signal of T1 unenhanced images causes contrast enhancement within a mass to become more conspicuous on subtracted sequences. This is helpful when evaluating a lesion with high signal on unenhanced T1-weighted sequences, where visual detection of enhancement can be difficult on conventional MRI.
目的
在本文中，我们将阐述减影成像在腹部MRI应用中的作用。
结论
减影成像在纵隔、腹部和骨盆成像中有多种应用。去除T1加权未增强图像中任何预先存在的信号，会使肿块内的对比增强在减影序列上变得更加明显。这在评估未增强T1加权序列上具有高信号的病变时很有帮助，因为在传统MRI上很难视觉检测到增强。
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