RF-induced heating for Cardiac Rhythm Management (CRM) in patients with different postures

This paper investigates the impacts of posture on the radio frequency (RF)-induced heating for patients with CRM devices exposed to a 1.5T MRI RF field. Three different arm postures are developed using the poseable human body model. The RF -induced heating of the CRM system, in terms of temperature rise, is calculated based on the transfer function approach. The statistical analysis of temperature increment, including the average value, standard deviation, and 95
^th
percentile, is performed for four different postures. Although the relative differences of these statistical results between the arm postures and original posture are less than 5%, for one specified configurations, the maximum variation on temperature increment can be 66%. The results indicate that the arm postures studied in this paper slight effect on the RF-induced heating of the CRM system.