TOF-MRA is a routine noninvasive method that does not require intravenous contrast agents or exposure to radiation for brain artery assessment. However, artifacts are prone to appear in conventional TOF-MRA under situations of complicated blood vessels or changes in blood flow; and the display of distal arterioles is also not good. The spiral acquisition technique has been previously introduced for scan acceleration of TOF-MRA, while here we compared the performance of conventional and spiral TOF-MRA under similar scan duration. Results indicated that spiral TOF-MRA provide better quality MRA images, and may help improve the clinical diagnosis of vascular problems.
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