%0 Journal Article
%A Emmerich, Julian
%A Laun, Frederik
%A Pfaffenberger, Asja
%A Schilling, Rebecca
%A Denoix, Michael
%A Maier, Florian
%A Sterzing, Florian
%A Bostel, Tilman
%A Straub, Sina
%T Technical Note: On the size of susceptibility-induced MR image distortions in prostate and cervix in the context of MR-guided radiation therapy.
%J Medical physics
%V 45
%N 4
%@ 0094-2405
%C New York, NY
%M DKFZ-2018-00526
%P 1586 - 1593
%D 2018
%X To investigate the extent of MR image distortions in the pelvis caused by susceptibility-induced field inhomogeneities in MR images in the context of a study on MR-guided radiotherapy.Using a high-bandwidth double-echo gradient echo sequence, field maps and distortion maps of the pelvis were calculated and evaluated for 219 exams (92 of female and 127 of male patients) to investigate patient-related image distortions caused by susceptibility differences in an ongoing study on MR-guided radiotherapy. The evaluation of distortions in the regions 'rectum', 'prostate', 'cervix', and in a reference region in the gluteus maximus was based on masks drawn by two readers.Distortions in the prostate and cervix were smaller than 0.03 px (0.1 mm) for 99
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:29394448
%R 10.1002/mp.12785
%U https://inrepo02.dkfz.de/record/132884