Contrast-enhanced MR angiography: the effects of k-space truncation on luminal representation in a carotid artery phantom model.
Using carotid bifurcation phantom models with different degrees of stenoses, we evaluated the accuracy of vessel lumen representation on MR images obtained from the inverse Fourier transform of different k-space percentages. Our results show that the lower thresholds of truncated k-space sampling are dictated by the severity of luminal narrowing. The defined thresholds may help improve efficiency of 3D MR imaging of the carotid arteries while maintaining adequate luminal representation.
Melhem
E R
ER
Department of Radiology and Radiological Sciences, The Johns Hopkins Hospital, Baltimore, MD 21287, USA.
Serfaty
J M
JM
Jones
L
L
Itoh
R
R
Kuszyk
B S
BS
Martin
J B
JB
Gailloud
P
P
Murphy
K P
KP
Rufenacht
D A
DA
D002339:Carotid Arteries / Q000033:anatomy & histology*; D016893:Carotid Stenosis / Q000175:diagnosis; D002533:Cerebral Angiography / Q000379:methods*; D003287:Contrast Media; D004056:Differential Threshold; D006801:Humans; D018810:Magnetic Resonance Angiography / Q000379:methods*; D019047:Phantoms, Imaging
D003287:Contrast Media