Deep learning-based magnetic resonance imaging reconstruction for improving the image quality of reduced-field-of-view diffusion-weighted imaging of the pancreas

Table 1 Details of imaging parameters

Parameters	FOCUS-DLR+/–	FOCUS-conv
Repetition time, ms	3000–10000	3500–15000
Echo time, ms	60	60
Flip angle, degree	90	90
FOV, mm2	220 × 110	220 × 110
Matrix	120 × 64	130 × 40
FOV reduction	Anterior-posterior	Anterior-posterior
Slice thickness, mm	3	4
Slice gap, mm	3	5
Number of slices	20–30	15–20
Number of excitations	4	8
b-values, s/mm2	0 and 600	0 and 600
Band width, Hz/pixel	1950	1300
Respiratory compensation	Respiratory-triggered with navigator echo	Respiratory-triggered with or without navigator echo
Deep learning reconstruction factor	Moderate	N/A
Scan time, min	2–5	3–10

The repetition time, number of slices and scan time varied depending on the patients' condition. DLR: Deep learning-based reconstruction; FOCUS: Field-of-view optimized and constrained undistorted single-shot; FOCUS-conv: Conventional field-of-view optimized and constrained undistorted single-shot; FOV: Field of view; N/A: Not applicable.