OBJECTIVE: The objective of our study was to assess the feasibility and diagnostic performance of time-resolved MR angiography (MRA) in the pretreatment evaluation of @entity1095 at 1.5 T. SUBJECTS AND METHODS: Twenty-two consecutive @entity1 (15 @entity1 and seven @entity1 ; mean age, 22.1    12.1 years) who were known or suspected to have @entity1462 were studied using time-resolved MRA with interleaved stochastic trajectories and parallel acquisition followed by conventional MRA (n = 12). All studies were performed on a 1.5-T whole-body MR system. Image sets of time-resolved and conventional MRA were independently reviewed by two observers for image quality, level of confidence and presence, location, and classification of @entity1462 . The interobserver agreement was calculated using conventional MRA as the standard of reference. RESULTS: On the basis of time-resolved MRA, nine of the lesions were categorized as high-flow @entity2758 ( @entity2758 ), the remaining 13 lesions were categorized as low-flow @entity1462 or @entity2695 . There was no significant difference in the image quality grading scores between the two observers for time-resolved MRA (p = 0.61) and conventional MRA (p = 0.54). The kappa coefficient revealed good agreement (k = 0.76) between time-resolved MRA and conventional MRA. Both observers visualized fine vascular details with higher confidence in two @entity1 on conventional MRA. The additional functional information regarding feeding artery and flow patterns provided by time-resolved MRA was confirmed by digital subtraction in all nine cases. CONCLUSION: Time-resolved MRA provided the temporal information needed for the appropriate classification of @entity1462 , enabling visualization of both the arterial feeders and draining veins. Furthermore, time-resolved MRA has the potential to be used as an initial and screening diagnostic tool obviating conventional MRA to categorize these lesions and determine their extent to correctly guide treatment.

Pretreatment evaluation of @entity1095 using low-dose contrast-enhanced time-resolved 3D MR angiography: initial results in 22 XXXX .

@entity1095 :: ('MESH:D016491', 'Disease') :: ['peripheral vascular malformations'] @entity1 :: ('9606', 'Species') :: ['women', 'patients', 'men'] @entity2758 :: ('MESH:D001165', 'Disease') :: ['arteriovenous malformations', 'AVMs'] @entity2695 :: ('MESH:D006391', 'Disease') :: ['hemangiomas'] @entity1462 :: ('MESH:D054079', 'Disease') :: ['vascular malformations']
@entity1 :: (9606,Species) :: ['patients']
