TABLE 1.
Recommended Protocols for MRI of Total Hip Arthroplasty, by Imaging Plane and Sequence Used
| Parameter | Coronal MAVRIC Inversion Recovery (Whole Pelvis) |
Coronal MAVRIC FSE (Whole Pelvis) |
Axial FSE (Whole Pelvis) |
Sagittal FSE (Affected Hip) |
Coronal FSE (Affected Hip) |
Oblique Axial FSE (Affected Hip) |
|---|---|---|---|---|---|---|
|
| ||||||
| TR (ms) | 4000 | 4000 | 5500 | 5500 | 4100 | 4000 |
| TE (ms) | 24 | 24 | 24 | 24 | ||
| Inversion time (ms) | 150 | |||||
| Bandwidth (kHz) | 125 | 125 | 125 | 125 | ||
| Echo-train length | 24 | 24 | 14 | 21 | 24 | 20 |
| Flip angle (°) | 110 | 110 | 160 | 160 | 160 | 160 |
| No. of excitations | 3 | 4 | 5 | 4 | ||
| FOV (cm) | 36 | 36 | 32 | 26 | 26 | 26 |
| Matrix | 256 × 192 | 512 × 256 | 512 × 256 | 512 × 384 | 512 × 352 | 512 × 256 |
| Slice/gap (mm) | 5.5 | 3.5 | 5/0 | 2.5/0 | 4/0 | 4/0 |
| No phase wrap | No | No | Yes | Yes | Yes | Yes |
Note—Patients were imaged in the supine position, with the feet first. MAVRIC = multiacquisition variable-resonance image combination, FSE = fast spin-echo.