Role of serial multiparametric magnetic resonance imaging in prostate cancer active surveillance

Table 1 Parameters of magnetic resonance imaging

Protocol	Sequence	Repetitiontime (ms)	Echo time(ms)	Flip angle	Slice thickness (mm)	Field of view	Matrixsize	Voxel size (mm × mm)	Reconstructed	Averages	Acquisition
				(°)		(AP × RL)			voxel size		time
						(mm × mm)			(mm × mm)		(min:s)
Sagittal T2-weighted	FSE	3000	100	90 exc.	5	160 × 160	224 × 216	0.71 × 0.74	0.63 × 0.63	6	3:42
	(18 echoes)			135 refoc.
T1-weighted	FSE	700	11	90 exc.	5	160 × 160	400 × 319	0.4 × 0.5	0.4 × 0.4	3	4:54
	(7 echoes)			145 refoc.
T2-weighted	FSE	3000	100	90 exc.	5	160 × 160	400 × 317	0.4 × 0.5	0.4 × 0.4	3	5:48
	(17 echoes)			145 refoc.
Diffusion weighted	Single-shot EPI	2500	64	90 exc.	4	160 × 144	80 × 59	2.00 × 2.42	1.25 × 1.24	61	4:02
					1 mm gap
dynamic contrast-enhanced	3D-FFE	4.4	2.1	15 exc.	5	260 × 260	128 × 102	2.03 × 2.52	1.02 × 1.02	2	6:37
T2 map	TSE	1300	N × 30	90 exc.	5	160 × 1602	160 × 160	1.00 × 1.25	0.63 × 0.63	2	10:323
	(6 echoes)			180 refoc.

¹Twelve averages were acquired for b = 500 s/mm².

²Field of view of 160 × 200 was used for larger patients to avoid fold over.

³Acquisition time was 13:08 min if the larger field of view of 160 × 200 was used. FSE: Fast spin echo; EPI: Echo planar imaging; FFE: Fast field echo; exc.: Excitation pulse; refoc.: Refocusing pulse; N: Echo number; AP × RL: Anterior posterior by right left.