Abstract
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.
Highlights
Magnetic resonance imaging (MRI) is a valuable diagnostic method for many cardiovascular diseases
Temperature measurements of pacemaker leads in a 1.0T high field open MRI using various MR sequences: initial results
Two high energy (1.+2.) and two realistic clinical cardiac (3.+4.) MR-sequences with artificial ECG-triggering at 60/min were used on the 1.0T HFO system: 1. T2-TSE (TR/TE=177/38ms;TSE-factor=16; time=58s;flip-angle= 90°); 2. 3-D bTFE (TR/TE=4.7/2.4ms;TFE-factor=6; time=382s;flip-angle=70°;TFE-shot-duration=34ms;TFEshots=532), 3
Summary
Temperature measurements of pacemaker leads in a 1.0T high field open MRI using various MR sequences: initial results. Sebastian A Seitz, Julian J Ebner, Gerriet Petry, Evangelos Giannitsis, Olaf Dössel, Hugo A Katus, Henning Steen2*. From 2011 SCMR/Euro CMR Joint Scientific Sessions Nice, France. From 2011 SCMR/Euro CMR Joint Scientific Sessions Nice, France. 3-6 February 2011
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