Ellis Beld 1, Marinus A. Moerland1, Frank Zijlstra2, Jan J.W. Lagendijk1, Max A. Viergever2, and Peter R. Seevinck2
1Department of Radiotherapy, UMC Utrecht, Utrecht, Netherlands, 2Image Sciences Institute, UMC Utrecht, Utrecht, Netherlands
In order to verify the positions of a high-dose-rate (HDR)
brachytherapy source during treatment, fast imaging and post-processing are
needed. To get high temporal resolutions, the use of lower spatial resolutions
in combination with subpixel source localization and the use of parallel
imaging were introduced. MR artifacts were simulated and correlated to the
experimentally obtained artifacts (by phase-only cross correlation) to determine the position of the HDR source.
It was shown that the described method was fast enough for localization of an
HDR brachytherapy source in real-time and high accuracy and precision
(submillimeter scale) were achieved.