Meeting Banner
Abstract #3600

PRF Thermometry for Monitoring Small Temperature Changes during Very Long Thermal Therapies: Field Drift Compensation Using FID Navigators

Tetiana Dadakova1, Axel Joachim Krafft1,2,3, Jan Gerrit Korvink4, Stephan Meckel5, and Michael Bock1

1Dept. of Radiology - Medical Physics, University Medical Center Freiburg, Freiburg, Germany, 2German Cancer Consortium (DKTK), Heidelberg, Germany, 3German Cancer Research Center (DKFZ), Heidelberg, Germany, 4Institute of Microstructure Technology, Karlsruhe Institute of Technology, Karlsruhe, Germany, 5Department of Neuroradiology, Neurocenter, University Medical Center Freiburg, Freiburg, Germany

Proton resonance frequency shift thermometry uses phase MR images to calculate temperature change in tissue during thermal therapies. Temporal and spatial changes of local magnetic field influence the phase images and can mimic temperature change. In order to correct for temperature errors due to magnetic field drift with time the FID navigators were used before and after imaging readout. Field-drift related phase slope during each repetition was calculated and used to correct the imaging data. This correction method is especially useful for the long thermometry procedures during which the temperature change is small and high temperature precision is needed.

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

Join Here