Examination of imaging parameters using multi and single-stack on brain and neck MRA

概要

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Time of flight (TOF) is one of the non-contrast MR angiography (MRA) technique which depicts the inflowing vessels non-invasively without using the contrast agent. High spatial resolution TOF image data that covers head and aortic arch by a single scan is suitable for cerebral arteries diagnosis but the examination method requires a long scan time that is not desired in clinical setting. Conversely, lower spatial resolution data can be used for carotid arteries and aortic arch diagnosis and the scan time also can be reduced, but the spatial resolution may not be good enough for the diagnosis of cerebral arteries. In this study, we optimized the spatial resolution for cerebral arteries, and compared the image quality of carotid arteries acquired with and without fat suppression and subclavian artery/aortic arch acquired with and without ECG gating. These optimized MRA images were also compared to the MRA images acquired with a conventional single-stack (SS) method. Twenty clinical MRA images acquired with both multi-stack (MS) and SS methods were visually assessed. Our study showed that higher image quality and better vessel visualization could be achieved with equal scan time to the conventional SS method by using the optimized MS method.
医用画像情報学会の論文