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.