Table 1.

Re-staging pelvic MR imaging acquisition parameters at 1.5T and 3T Ingenia Philips Healthcare®, Best, The Netherlands

	Oblique axial T2-W turbo spin-echo		Oblique coronal T2-W turbo spin-echo		Sagittal T2-W turbo spin-echo		Oblique axial single-shot spin-echo echo-planar diffusion		Axial T1-weighted gradient echo imaging
	1.5T	3T	1.5T	3T	1.5T	3T	1.5T	3T	1.5T	3T
Echo time (msec)	115	105	115	105	105	100	92	95	10	15
Repetition time (msec)	4206	3943	4206	3943	2433	4672	6779	4140	683	734
Echo train length	17	19	17	19	17	17	–	–	5	7
Slice thickness (mm)	3	3	3	3	3	3	4	4	45	4
Gap (mm)	0	0	0	0	0	0	0	0	1	0.8
Matrix	400 x 333	400 x 259	400 x 333	400 x 259	252 × 223	252 x 237	76 × 65	80 × 65	376 x 390	404 × 415
Field-of-view (mm)	200 x 200	200 × 200	200 x 200	200 × 200	200 × 200	200 × 200	200 × 200	200 × 200	300 x 350	300 × 350
In-plane resolution (mm)	0.5 x 0.6	0.5 x 0.6	0.5 x 0.6	0.5 x 0.6	0.8 × 0.8	0.8 x 0.8	2.6 × 3.01	2.5 × 3.1	0.8 x 0.9	0.74 × 0.82
Signal averages	2	2	2	2	2	1	14	13	1	1
B value	–	–	–	–	–	–	1500	2000	–	–

Oblique axial scans are oriented perpendicularly to the long axis of the rectal wall at tumour location; ⁺Spectral pre-saturation with inversion recovery is utilised for fat saturation