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Musculoskeletal neoplasms: preoperative evaluation with MR angiography.

PURPOSE
To assess the ability of magnetic resonance (MR) angiography to depict vascularity of musculoskeletal neoplasms.


MATERIALS AND METHODS
Two-dimensional (2D) time-of-flight (TOF) MR angiography was compared with conventional arteriography during staging of musculoskeletal tumors in 23 prospective examinations. Phase-contrast (PC) MR angiography was also performed in 19 cases and evaluated as a possible supplement to 2D TOF imaging.


RESULTS
Of named vessels, 92% in proximity to tumor were noted by blinded readers. The PC technique provided supplemental data in 47% of cases, usually related to better delineation of in-plane feeder vessels and areas with pulsatile blood flow. Of the 28 branch feeder vessels, 23 were noted on both conventional arteriograms and MR angiograms in a nonblinded review, but 16 were difficult to distinguish as feeders because of lack of associated tumor blush.


CONCLUSION
MR angiography has promise to replace conventional arteriography for orthopedic preoperative planning.