The Advance in Technique and Clinical Application of Different MR Angiography——Emphasis on Carotid ,Renal,lliac and Pulmonary Artery Imaging
Magnetic resonance angiography(MRA) was widely used in head, neck and extremities since 1985 because of its non -invasion and high sensitivity Non -contrast enhanced MRA(PC and TOF) did not succeed m displaying various vascular dis-eases, especially in vessels of body. Dynam-ic contrast enhanced MRAIDCE MRA) is one of the recently fast developed techniques in MRA and shows a promising prospects in di-agnosis of some vascular diseases of aorta and major branches. With reduced T1 and without relationship with flow effect, DCE MRA overcomes limitations of non-DCE MRA. This paper evaluates the value of ap-plication of different MRA in aorta, major branches and supenor and inferior cavae and portal vein compared with other minimally in-vasive modalities such as CT angiography, mainly focus on the carotid, renal, iliac and pulmonary artery imaging. Although there are some limitations in this technique, such as the low spatial resolution, false -positive and no therapeutic inventions performed at the time of diagnosis, MRA will be progressively replacement of conventional angiography in-cluding IADSA with development of tech-nique and further clinical research.