A preliminary assessment of the intracranial aneurysm wall imaging with high-resolution magnetic resonance imaging / 中国脑血管病杂志

Objective To investigate the feasibility of the arterial wall imaging technology of high-resolution magnetic resonance imaging ( HR-MRI) in the risk assessment of intracranial aneurysm rupture. Methods Fifty-four patients with 66 intracranial aneurysms underwent 3. 0 T HR-MRI multiple sequences arterial wall imaging from November 2013 to March 2015 were analyzed retrospectively. Five patients with ruptured aneurysm were used as a control group. The characteristic differences of aneurysm lesions between an unruptured intracranial aneurysm ( UIA) wall enhancement group and a non-enhancement group were compared. The risk factors for rupture were analyzed according to the size,location, and basic clinical characteristics of aneurysm. Results (1) HR-MRI revealed that whether the aneurysm walls enhanced or not,there were no significant differences in the location size,wide-necked aneurysm or not,and ratios of aneurysm height and neck width (all P >0. 05). (2) The enhancement rates of the aneurysm volume <2 group and ≥2 group were 20%(8/40) and 61. 9%(13/21) respectively,the incidence of the ruptured aneurysm asci was higher than that of UIA,and there was significant difference ( all P<0. 05). There were no significant differences in neck width,rate of aneurysm volume,ratios of aneurysm height and neck width,and enhancement rates among the groups. Conclusion The preliminary results of this study have showed that there is a related trend between the HR-MRI aneurysm wall enhancement and the risk of rupture,but a further large sample follow-up study is needed.

Bilateral Vertebral Artery Dissection Involving the Basilar Artery: the Role of High-Resolution MR Imaging

No abstract available.

The clinical analysis of high resolution MR image diagnosing brachial plexus root avuision injury / 中华显微外科杂志

Objective To discuss the characteristic of brachial plexus root avulsion injury of high resolution MR imaging and the value in diagnosing of brachial plexus root avulsion injury early.Methods Fourty-five cases of brachial plexus root avulsion injury patients had being used for investigation to find the characteristic and diagnostic value of MR image of brachial plexus root avulsion injury,which all have pre-operative MR imaging and were diagnosed brachial plexus root avulsion injury by intra-operative exploration and electrophysiology form February 2006 to February 2011.Results Post-traumatic spinalmeningolceles were seen in 42 cases,the frequency was 93.3％; Displacement of spinal cord was seen in 25 cases,the frequency was 55.6％; Absence of anterior and posterior root of spinal nerve was seen in 8 eases,the frequency was 17.8％;Black line sign was seen in 18 cases,the frequency was 40.0％.The sensitivity,specificity,and accuracy of MRI in diagnosing brachial plexus root injury were 95.7％,77.8％ and 94.6％ respectively.Conclusion Posttraumatic spinalmeningolceles are most often seen in MR of brachial plexus root avulsion injury,this sign can play an important role in diagnosing and treatment of brachial plexus root avulsion injury.