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