RT Journal Article SR Electronic T1 MR-Guided Catheter Navigation of the Intracranial Subarachnoid Space JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 626 OP 629 VO 24 IS 4 A1 George Rappard A1 Gregory J. Metzger A1 James L. Fleckenstein A1 Evelyn E. Babcock A1 Paul T. Weatherall A1 Robert E. Replogle A1 G. Lee Pride, Jr A1 Susan L. Miller A1 Christina E. Adams A1 Phillip D. Purdy YR 2003 UL http://www.ajnr.org/content/24/4/626.abstract AB Summary: Percutaneous intraspinal navigation (PIN) is a new minimally invasive approach to the CNS. The authors studied the utility of MR-guided intracranial navigation following access to the subarachnoid compartment via PIN. The passive tracking technique was employed to visualize devices during intracranial navigation. Under steady-state free precession (SSFP) MR-guidance a microcatheter-microguidewire was successfully navigated to multiple brain foci in two cadavers. SSFP MR fluoroscopy possesses adequate contrast and temporal resolution to allow MR-guided intracranial navigation.