Retrospective strategy for reducing respiratory motion artifacts in renal perfusion imaging with arterial spin labeling
Arnaud Guidon 1 , Weiying Dai 2 , and David C. Alsop 2
GE Healthcare Global MR Applications and
Workflow, Boston, MA, United States,
of Radiology, Beth Israel Deaconess Medical Center,
Boston, MA, United States
Arterial Spin Labeling is well-suited for evaluating
patients with renal insufficiency for whom risk of
gadolinium-based contrast administration is undesirable.
However it is vulnerable to misalignment errors
predominantly due to abdominal displacements during
respiration. Strategies have previously been proposed
either relying on controlled-breathing or navigators.
The latter is incompatible with background suppression
and the former still requires active patients
cooperation. Here, we propose an alternative approach
allowing background suppressed Free-Breathing Renal
Perfusion imaging with retrospective elastic
registration of individual tag and control images and
report on its relative robustness for 3 different
background suppression levels.
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