Comparison of selective arterial spin labeling using 1D and 2D tagging RF pulses.
Generic arterial spin labeling (ASL) techniques label all brain feeding arteries. In this work, we used two different selective ASL (SASL) methods to show the perfusion of one single artery. A slice selective inversion of an area including the desired vessel was compared to a multidimensional RF pulse with Gaussian profile to label only the artery of interest. Perfusion images with a resolution of 2 x 2 x 5 mm(3) are shown that were acquired after tagging only the internal carotid artery of healthy volunteers. In addition, both techniques were applied to a patient with an extra-intracranial bypass to illustrate its perfusion territory. These perfusion images are consistent with a standard angiography. SASL imaging with a resolution of 2 x 2 x 5 mm(3) is possible in a total scan time of 5 min. The presented MR techniques may in part replace the assessment of revascularization success by conventional angiography.
Konstandin
Simon
S
Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Germany. Simon.Konstandin@MedMa.uni-heidelberg.de
Heiler
Patrick M
PM
Scharf
Johann
J
Schad
Lothar R
LR
D015901:Angiography, Digital Subtraction; D020771:Anterior Cerebral Artery; D001921:Brain / Q000098:blood supply*; D002343:Carotid Artery, Internal; D016893:Carotid Stenosis / Q000503:physiopathology / Q000601:surgery; D002533:Cerebral Angiography / Q000379:methods*; D002548:Cerebral Revascularization; D004292:Dominance, Cerebral / Q000502:physiology; D005583:Fourier Analysis; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D018810:Magnetic Resonance Angiography / Q000379:methods*; D020768:Middle Cerebral Artery; D016011:Normal Distribution; D019047:Phantoms, Imaging; D012039:Regional Blood Flow / Q000502:physiology; D012984:Software; D013113:Spin Labels; D051598:Whole Body Imaging
D013113:Spin Labels