[3D- @entity215 MR-angiography with high spatial resolution for surgical XXXX ].

@entity1 @entity13 @entity1313 @entity5 @entity215 @entity11 @entity51
UNASSIGNED: Despite the obvious progress in modern neurosurgery, surgery for @entity1313 is often associated with a high risk of postoperative @entity51 , which is primarily caused by damage to perforating arteries of the M1 segment of the middle cerebral artery. AIM: The work is aimed at evaluating the effectiveness of high resolution time-of-flight (3D- @entity215 ) MR angiography in imaging of medial and lateral lenticulostriate arteries and determining their relationship to @entity5 edge in @entity1 with @entity11 . MATERIAL AND METHODS: 3D- @entity215 MR angiography data were analyzed in 20 @entity1 with primarily diagnosed @entity13 involving the insula. All @entity1 underwent non-contrast enhanced 3D- @entity215 MR angiography. In 6 cases, 3D- @entity215 MRA was performed before and after contrast enhancement. RESULTS: 3D- @entity215 angiography before intravenous contrast injection was capable of visualizing the medial lenticulostriate arteries in 19 @entity1 (95% of all cases) and lateral lenticulostriate arteries in 18 @entity1 (90% of all cases). Contrast-enhanced 3D- @entity215 angiography allows for better visualization of both the proximal and distal segments of lenticulostriate arteries. Three variants of relationship between the @entity5 and lenticulostriate arteries were identified. Variant I: the @entity5 grew over the arteries without their displacement in 2 cases (10% of the total number of observations); variant II: the @entity5 caused medial displacement of arteries without growing over them in 11 cases (55% of the total number of observations); variant III: the @entity5 partially grew over and displaced arteries in 2 cases (10%). In 25% of cases (5 @entity1 ), @entity5 was poorly visualized on 3D- @entity215 MR angiograms because their signal characteristics did not differ from those of the medulla ( @entity5 tissue was T1 isointense). As a result, it was impossible to determine the relationship between the @entity5 and lenticulostriate arteries. CONCLUSION: High spatial resolution time-of-flight MR angiography can be recommended for preoperative imaging of lenticulostriate arteries to plan the extent of neurosurgical resection in @entity1 with @entity1313 .
