University of Twente Student Theses
Radiofrequency Safety of External Defibrillation Electrodes at 1.5T
Oosterveld, R.N. (2022) Radiofrequency Safety of External Defibrillation Electrodes at 1.5T.
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| Abstract: | In health care magnetic resonance imaging (MRI) scans have become the method of choice for diagnosis of several physical conditions, but there is still a large group of patients that are excluded from MRI-diagnosis, such as patients with risk of sudden cardiac arrest (SCA). In that case immediate resuscitation is warranted. Unluckily, automatic external defibrillation (AED) devices nowadays are not compatible with MRI, because AED electrodes enhance unwanted body tissue heating. However, dividing electrodes into several parts and altering the position may diminish these thermal side effects. Therefore, this study focused on the differences in body tissue heating adjacent to the AED electrodes during MRI, comparing the positioning and use of several electrodes. In this study the safety of external defibrillator electrodes was investigated in a two phase setup. Firstly, the effect of heating was investigated in a computer simulation, using the specific absorption rate (SAR) as outcome. Secondly, in an experiment, using a phantom as substitute for human body tissue, actual temperature changes during MRI radiation around AED electrodes were measured. |
| Item Type: | Essay (Master) |
| Faculty: | TNW: Science and Technology |
| Subject: | 44 medicine, 53 electrotechnology |
| Programme: | Biomedical Engineering MSc (66226) |
| Link to this item: | https://purl.utwente.nl/essays/93942 |
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