Temperature measurements of pacemaker leads in a 1.0T high field open MRI using various MR sequences: initial results
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KeywordsMagnetic Resonance Imaging Cardiac Magnetic Resonance Imaging Magnetic Resonance Imaging System Pacemaker Lead Magnetic Resonance Imaging Exam
Magnetic resonance imaging (MRI) is a valuable diagnostic method for many cardiovascular diseases. To date, patients with pacemakers are contra-indicated for cardiac MRI exams due to several effects that can occur during the MRI procedure: a) heating of the lead-tip, and b) less hazardous sensing errors and device malfunctions. Almost all measurements on MRI pacemaker compatibility have been conducted on classic 1.5 or 3T cylindrical whole-body MRI systems. In contrast, this study focused on the use of a high field open MRI (HFO) system due to its advantageous properties of RF fields which are commonly made responsible for the induction of lead heating.
Determine the feasibility of MRI examinations of patients with cardiac pacemakers using an open 1.0 T MRT system and realistic cardiac imaging sequences.
In-vitro measurement of an MR compatible and a regular pacemaker lead in geometrically realistic positions in an HFO open MRI system showed no relevant tip heating for both ECG-gated high energy as well as clinically used cardiac MR sequences. Further in-vivo research has to be conducted to clarify the relevance of these findings.
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