title: Hybrid MR interventional imaging system: combined MR and angiography suites with single interactive table. Feasibility study in vascular liver tumor procedures.
abstract: Our objective was to evaluate the feasibility of a hybrid system consisting of a high-field MR and fully equipped digital subtraction angiography (DSA) unit for MR-guided vascular interventions. In a newly built hybrid system, consisting of a high-field MRI and a fully equipped DSA unit, elective interventional hybrid procedures were performed. Between May 2000 and November 2001, 30 patients with liver tumors underwent MR-guided chemoembolization using the hybrid system. During the intervention accurate catheter position was monitored with real-time and dynamic MR imaging. Elective hybrid interventional vascular procedures were performed successfully in 23 patients with liver metastases and hepatocellular carcinoma ( n=7). Patients could be transferred between the MRI and angiographic units on a carbon fiber tabletop within 10 s. Initial clinical trials demonstrated that in the chemoembolization of primary and secondary liver tumors the hybrid approach resulted in a change of catheter position in 40% of procedures. In combining high-field MR system and a fully equipped interventional vascular angiographic unit as backup, this hybrid system improves the therapeutic capabilities of interventional vascular procedures in the liver.
authors.affiliation: Institute of Diagnostic and Interventional Radiology, J.W. Goethe University, Theodor-Stern-Kai 7, 60590 Frankfurt/Main, Germany. T.Vogl@em.uni-frankfurt.de
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Vogl
authors.forename: Jörn O
authors.initials: JO
authors.lastname: Balzer
authors.forename: Martin G
authors.initials: MG
authors.lastname: Mack
authors.forename: Gregor
authors.initials: G
authors.lastname: Bett
authors.forename: Anton
authors.initials: A
authors.lastname: Oppelt
mesh_terms: D015901:Angiography, Digital Subtraction / Q000295:instrumentation*; D006528:Carcinoma, Hepatocellular / Q000628:therapy; D004621:Embolization, Therapeutic; D005240:Feasibility Studies; D006801:Humans; D008113:Liver Neoplasms / Q000175:diagnosis / Q000556:secondary / Q000628:therapy*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*