Outflow refreshment angiography: a bright blood, bright static tissue technique.
A new "bright blood" strategy, outflow refreshment imaging, is introduced in which a number of overlapping slices are excited in rapid succession. Flowing spins that refresh each overlapped slice portion contribute a bright signal. Additionally, static tissue in each non-overlapped slice portion also yields a bright signal. However, the flow/static contrast is comparable to that produced in inflow refreshment images, and angiograms can be generated by conventional maximum intensity projection processing. The dual ability to visualize angiograms and static tissue images is a major benefit of the strategy. Computer simulations of flow sensitivities and in vivo results are presented which compare the outflow and inflow refreshment imaging strategies.
Doyle
M
M
Division of Cardiovascular Disease, University of Alabama, Birmingham 35294.
Mulligan
S A
SA
Matsuda
T
T
Pohost
G M
GM
D001783:Blood Flow Velocity; D001808:Blood Vessels / Q000033:anatomy & histology* / Q000502:physiology; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*