Meeting Banner
Abstract #2349

Monitoring local heating around an interventional MRI probe with RF radiometry

Mehmet Arcan Erturk 1,2 , AbdEl-Monem M. El-Sharkawy 2 , and Paul A. Bottomley 1,2

1 Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, Maryland, United States, 2 Department of Radiology, Johns Hopkins University, Baltimore, Maryland, United States

Active interventional loopless antenna may heat locally during MRI, or when they are used for thermal ablation therapy. Here we develop a novel MRI-less thermometry method employing the internal MRI detector as an RF radiometer at the 3T MRI frequency. Local temperature is monitored by a loopless antenna, based on the magnitude of its RF noise voltage. The radiometer is calibrated in a gel phantom to an accuracy of <0.3C at two measurements/sec. The radiometer tracks the temperature probe with high local sensitivity. RF radiometry provides thermometry without MRIs confounding factors or the need for additional sensor probes.

This abstract and the presentation materials are available to members only; a login is required.

Join Here