[Increasing resolution of cerebral small arteries in 3D TOF MR angiography: efficacy of nitroglycerin-MRA (NTG-MRA) in patients with neurovascular disease].

MRI and MRA were performed in 63 patients suspected of having neurovascular disease. NTG-MRA enabled us to visualize cerebral small peripheral arteries more clearly. Most stenotic sites were seen as slightly dilatated after NTG administration. Secondly, we examined whether there was any significant difference in the resolution of small arteries according to the presence or absence of neurovascular disease. With NTG-MRA, the rate of increase in resolution in patients with neurovascular stenosis was significantly higher than that in patients without neurovascular stenosis.