Measurements of RF heating during 3.0-T MRI of a pig implanted with deep brain stimulator
- Title
- Measurements of RF heating during 3.0-T MRI of a pig implanted with deep brain stimulator
- Author
- 장동표
- Keywords
- MRI; fMRI; Medical device safety; DBS; Deep brain stimulation; 3.0T
- Issue Date
- 2013-03
- Publisher
- ELSEVIER SCIENCE INC
- Citation
- Magnetic Resonance Imaging, 31, 5, 783-788
- Abstract
- PurposeTo present preliminary, in vivo temperature measurements during MRI of a pig implanted with a deep brain stimulation (DBS) system.Materials and MethodsDBS system (Medtronic Inc., Minneapolis, MN) was implanted in the brain of an anesthetized pig. 3.0-T MRI was performed with a T/R head coil using the low-SAR GRE EPI and IR-prepped GRE sequences (SAR: 0.42 and 0.39 W/kg, respectively), and the high-SAR 4-echo RF spin echo (SAR: 2.9 W/kg). Fluoroptic thermometry was used to directly measure RF-related heating at the DBS electrodes, and at the implantable pulse generator (IPG). For reference the measurements were repeated in the same pig at 1.5 T and, at both field strengths, in a phantom.ResultsAt 3.0 T, the maximal temperature elevations at DBS electrodes were 0.46 °C and 2.3 °C, for the low- and high-SAR sequences, respectively. No heating was observed on the implanted IPG during any of the measurements. Measurements of in vivo heating differed from those obtained in the phantom.ConclusionThe 3.0-T MRI using GRE EPI and IR-prepped GRE sequences resulted in local temperature elevations at DBS electrodes of no more than 0.46 °C. Although no extrapolation should be made to human exams and much further study will be needed, these preliminary data are encouraging for the future use 3.0-T MRI in patients with DBS.
- URI
- https://www.sciencedirect.com/science/article/pii/S0730725X12004341?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/73089
- ISSN
- 0730-725X
- DOI
- 10.1016/j.mri.2012.11.005
- Appears in Collections:
- GRADUATE SCHOOL OF BIOMEDICAL SCIENCE AND ENGINEERING[S](의생명공학전문대학원) > ETC
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