Table 1.

Sequence parameters of FOCUS DWI in the patient groups

	Catheter preparation	Enema preparation
FOV (mm2)	240 × 120	220 × 110
Acquisition matrix	160 × 80	136 × 68
In-plane resolution (mm2)	1.5 × 1.5	1.6 × 1.6
Slice thickness/gap (mm)	4/0.4	3.5/0.2
Phase-encoding direction	Anterior-posterior	Anterior-posterior
TE (ms)	58.2	68.6
TR (ms)	3700	4500
Echo train length (ms)	41	34
b values (s/mm2)	50,1500	50, 100, 200, 900, 1300, 2000
Number of signal averages	4, 16	3, 3, 5, 12, 16, 17