title: Interventional MRA using actively visualized catheters, TrueFISP, and real-time image fusion.
abstract: An integrated system for performing interventional magnetic resonance angiography (MRA) with actively visualized instruments and real-time image fusion was implemented on a 1.5 T scanner. True fast imaging with steady precession (TrueFISP) imaging provided high acquisition speed paired with high signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) for the simultaneous visualization of active instruments and arterial morphology. The system enabled simultaneous image reconstruction and image postprocessing of multiple receiver channels, with subsequent image fusion display in real time. Optional interleaved image acquisition in two planes provided additional important information for biplanar instrument guidance. Various vascular interventions, including selective catheterization and subsequent selective MRA of the abdominal aorta, renal arteries, superior mesenteric artery (SMA), hepatic artery, and aortic arch, were performed on 10 pigs under MR guidance. In terms of instrument contrast, image acquisition, reconstruction, and fusion speed, the setup represents a powerful platform for performing interventional MRA procedures.
authors.affiliation: Department of Diagnostic and Interventional Radiology, University Hospital Essen, Essen, Germany. HHQuick@uni-essen.de
authors.forename: Harald H
authors.initials: HH
authors.lastname: Quick
authors.forename: Hilmar
authors.initials: H
authors.lastname: Kuehl
authors.forename: Gernot
authors.initials: G
authors.lastname: Kaiser
authors.forename: Dirk
authors.initials: D
authors.lastname: Hornscheidt
authors.forename: Krzysztof P
authors.initials: KP
authors.lastname: Mikolajczyk
authors.forename: Stephanie
authors.initials: S
authors.lastname: Aker
authors.forename: Jörg F
authors.initials: JF
authors.lastname: Debatin
authors.forename: Mark E
authors.initials: ME
authors.lastname: Ladd
mesh_terms: D000818:Animals; D002404:Catheterization; D003287:Contrast Media; D019786:Gadolinium DTPA; D021621:Imaging, Three-Dimensional; D018810:Magnetic Resonance Angiography / Q000295:instrumentation* / Q000379:methods; D013552:Swine
chemical_list: D003287:Contrast Media; D019786:Gadolinium DTPA