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. 2012 Dec;85(1020):e1256–e1262. doi: 10.1259/bjr/26802977

Table 4. Quality of registration results, where the mean error is the distance from the centre of the CT structures to the centre of the MRI structures.

Structure CT to MRID mean (mm) CT to MRIRT mean (mm)
Left femoral head 3.0±2.2 2.0±1.6
Right femoral head 3.4±1.8 1.8±1.2
Symphysis pubis 5.2±3.0 1.8±1.1
Prostate 5.0±2.5 3.6±2.2
Prostate and seminal vesicles 5.2±2.3 4.1±2.6

MRID, diagnostic MRI scan; MRIRT, MRI scan in the radiotherapy position; SD, standard deviation.