TY - JOUR
T1 - Flow‐compensated limited flip angle MR angiography
AU - Lee, James N.
AU - Riederer, Stephen J.
AU - Pelc, Norbert J.
PY - 1989/10
Y1 - 1989/10
N2 - A method of subtraction angiography that has an acquisition time of 8 s per slice is described. Flow‐compensated and uncompensated measurements are acquired in an interleaved fashion using limited flip angles and gradient refocusing. Magnitude images are reconstructed and subtracted to generate the angiogram. Results were generated in vivo in the imaging of the carotid bifurcation of several human volunteers. Susceptibility and inhomogeneity induced artifacts are prominent in thick slices, but can be greatly reduced by imaging several thin slices and adding them together. Thin slices do not require de‐phasing gradients to reduce the dynamic range, and there is no signal cancellation in overlapping vessels. The method is ideal for acquiring scout angiograms, and with averaging may produce images of diagnostic quality. © 1989 Academic Press, Inc.
AB - A method of subtraction angiography that has an acquisition time of 8 s per slice is described. Flow‐compensated and uncompensated measurements are acquired in an interleaved fashion using limited flip angles and gradient refocusing. Magnitude images are reconstructed and subtracted to generate the angiogram. Results were generated in vivo in the imaging of the carotid bifurcation of several human volunteers. Susceptibility and inhomogeneity induced artifacts are prominent in thick slices, but can be greatly reduced by imaging several thin slices and adding them together. Thin slices do not require de‐phasing gradients to reduce the dynamic range, and there is no signal cancellation in overlapping vessels. The method is ideal for acquiring scout angiograms, and with averaging may produce images of diagnostic quality. © 1989 Academic Press, Inc.
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U2 - 10.1002/mrm.1910120102
DO - 10.1002/mrm.1910120102
M3 - Article
C2 - 2691835
AN - SCOPUS:0024419806
SN - 0740-3194
VL - 12
SP - 1
EP - 13
JO - Magnetic Resonance in Medicine
JF - Magnetic Resonance in Medicine
IS - 1
ER -