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MRI to CT Matching
Keep patient positioning the same for MRI and CT scanning
Flat table top
Similar bladder filling and rectum filling instructions (also for treatment)
No rectal coil!!!!
Markers are poorly visible on standard MRI sequences that are used to
visualize the tumor
Use additional sequence to visualize markers in order to facilitate MRI-to-CT
registration
Calypso markers give large artefact in MRI
Do MRI before implantation of markers
Discuss with the radiologist the MRI settings and sequences
A MRI for radiotherapy has other requirements as for radiology purposes
(e.g. slice thickness)