1 Department of Radiology and Nuclear Medicine, Imaging Division, University Medical Center Utrecht, Utrecht, The Netherlands. Electronic address: a.j.a.t.braat@umcutrecht.nl.
2 Department of Imaging Physics, University of Texas MD Anderson Cancer Center, Houston, TX, USA.
3 Department of Radiology and Nuclear Medicine, Imaging Division, University Medical Center Utrecht, Utrecht, The Netherlands.
4 Department of Interventional Radiology, University of Texas MD Anderson Cancer Center, Houston, TX, USA.