title: MR-compatible RF ablation system for online treatment monitoring using MR thermometry.
abstract: RF ablation (RFA) is used for thermal ablation of tumors in which the RF electrode is placed in the tissue under image-guidance. Because of the good tumor visibility and the lack of ionizing radiation, MR-guided RFA is the method of choice. Additionally, with the help of MR thermometry the RF ablation can be monitored during the intervention. Unfortunately, the imaging of an MR scanner is highly sensitive to interferences caused by external electrical signals. In this paper the high-power RF ablation signal of a commercially available medical therapy device is made MR-compatible. A design of a low-pass filter with high-power compatibility is presented. The filter performance is demonstrated by means of simulations and measurements.
authors.affiliation: Department of Signal Processing and Communications, Otto-von-Guericke-University of Magdeburg, Universitaetsplatz 2, 39106, Germany. karl.will@oygu.de
authors.forename: Karl
authors.initials: K
authors.lastname: Will
authors.forename: Johannes
authors.initials: J
authors.lastname: Krug
authors.forename: Kerstin
authors.initials: K
authors.lastname: Jungnickel
authors.forename: Frank
authors.initials: F
authors.lastname: Fischbach
authors.forename: Jens
authors.initials: J
authors.lastname: Ricke
authors.forename: Georg
authors.initials: G
authors.lastname: Rose
authors.forename: Abbas
authors.initials: A
authors.lastname: Omar
mesh_terms: D016477:Artifacts; D017115:Catheter Ablation / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D009862:Online Systems; D025321:Surgery, Computer-Assisted / Q000295:instrumentation*; D013817:Thermography / Q000295:instrumentation*