In vitro artifact assessment of an MR-compatible, microwave antenna device for percutaneous tumor ablation with fluoroscopic MRI-sequences
| Autor: | David-Emanuel Kessler, Hansjörg Rempp, Philippe L. Pereira, Rüdiger Hoffmann, Jakob Weiss, Konstantin Nikolaou, Stephan Clasen |
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| Rok vydání: | 2017 |
| Předmět: |
Parabolic antenna
Ablation Techniques Materials science Percutaneous Mr compatible In Vitro Techniques 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Imaging Three-Dimensional medicine Microwaves Percutaneous tumor ablation Artifact (error) medicine.diagnostic_test Phantoms Imaging Microwave ablation Liver Neoplasms Magnetic resonance imaging Magnetic Resonance Imaging 030220 oncology & carcinogenesis Fluoroscopy Catheter Ablation Surgery Artifacts Microwave Biomedical engineering |
| Zdroj: | Minimally invasive therapyallied technologies : MITAT : official journal of the Society for Minimally Invasive Therapy. 27(1) |
| ISSN: | 1365-2931 |
| Popis: | To evaluate artifact configuration and diameters of a magnetic resonance (MR) compatible microwave (MW) applicator using near-realtime MR-fluoroscopic sequences for percutaneous tumor ablation procedures.Two MW applicators (14 G and 16 G) were tested in an ex-vivo phantom at 1.5 T with two 3 D fluoroscopic sequences: T1-weighted spoiled Gradient Echo (GRE) and T1/T2-weighted Steady State Free Precession (SSFP) sequence. Applicator orientation to main magnetic field (BThe artifact was homogenous along the whole length of both antennas with all tested parameters. The tip artifact diameter of the 16 G antenna measured 6.9 ± 1.0 mm, the shaft artifact diameter 8.6 ± 1.2 mm and the Tip Location Error (TLE) was 1.5 ± 1.2 mm.The tip artifact diameter of the 14 G antenna measured 7.7 ± 1.2 mm, the shaft artifact diameter 9.6 ± 1.5 mm and TLE was 1.6 ± 1.2 mm. Orientation to BThe MR-compatible MW applicator's artifact seems adequate with an acceptable TLE for safe applicator positioning during near-realtime fluoroscopic MR-guidance. |
| Databáze: | OpenAIRE |
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