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Table 1 Parameters for MRI protocol

From: Small bowel MR enterography: problem solving in Crohn’s disease

Parameter (1) True FISP (2) Cine True FISP (3) Diffusion (4) T1 volumetric fat-saturated sequencea, b (5) HASTEb
Axial Coronal Coronal Axial Axial Coronal Axial Coronalc
TR/TE (ms) 4.09/1.77 4.19/2.1 74/1.48 5,600/82 5.43/2.41 5.43/2.36 900/83 1,000/217
Flip angle (degrees) 53 70 63 10 10 150 139
Field of view (mm) 400 450 450 350 400 450 400 400
Parallel imaging factor 2 0 2 2 2 2 2 2
Section thickness (mm) 4 4 8 5 3 3 6 5
Intersection gap (mm) 0 3 1.6 0 0 0 0 0
Number of sections per stack 50 20 18 40-60 64 64 20 20
Breath-hold time per stack 18 14 Free breathing Free breathing 18 14 18 22
Number of stacks 2 or 3 1 1 2 2 or 3 1 2 or 3 1 or 2
Bandwidth (Hz) 454 488 965 1302 300 300 416 130
  1. True FISP true fast imaging with steady state precession, HASTE half-Fourier acquired single shot turbo spin echo, TR repetition time, TE echo time
  2. aThe axial and coronal sequences are performed before and following intravenous administration of gadolinium
  3. bThese sequences are performed following intravenous spasmolytic (e.g. buscopan) unless contraindicated
  4. cThe coronal HASTE sequence can be performed with fat saturation to help distinguish between submucosal fat and oedema