Magnetic resonance angiography in the head and neck.
Magnetic resonance angiography (MRA) provides a means to visualize vessel structure without the use of contrast agents and consequently without the risks and discomfort associated with contrast media. We have developed a flow encoding procedure which exploits the spatial dependence in the phase of spin magnetization generated by a gradient pulse. This technique yields image information for only those spins having macroscopic motion (i.e. flowing blood). Excellent suppression of non-moving spins can be obtained despite the overwhelming abundance of stationary spins. Data are presented in a projection format similar to that of traditional subtraction angiography.
Dumoulin
C L
CL
General Electric Corporate Research and Development Center, Schenectady, New York.
Hart
H R
HR
D001808:Blood Vessels / Q000033:anatomy & histology; D006257:Head / Q000098:blood supply*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009333:Neck / Q000098:blood supply*