Table 1.
MRI-IPH detection sequence parameters.
| Sequence parameters | 3D-MPRAGE78 | 3D-TOF | 3D-T1w FSE (variable flip angle) | 3D-SNAP80 |
|---|---|---|---|---|
| Orientation | Oblique-coronal | Axial | Oblique-coronal | Oblique-coronal |
| Blood flow suppression | Nonselective inversion | Saturation slab for venous flow | DIR, QIR, or DANTE | Nonselective inversion |
| Resolution, mm, for 3D isotropic | 0.5-0.8 | 0.5-0.8 | 0.8-1.0 | 0.5-0.8 |
| No. of slices | 80 | 64 | 64 | 80 |
| TR/TE, ms | 10/2.55 | 20/3.4 | 800/22 | 10/4.8 |
| TI or prep. time, ms | 350 (TI) | 600 (TI) or 150 (DANTE prep.) | 500 (TI) | |
| Cartesian or SOS | SOS | Cartesian | Cartesian | Cartesian |
| Scan time, min | 3-5 | 3-5 | 5-7 | 5-7 |
| FOV, mm | 160 × 160 | 160 × 160 | 160 × 160 | 160 × 160 |
| Fat saturation | Yes | No | Yes | Yes |
| Reconstruction | Ciné or static | MPR, MIP | Phase-sensitive inversion |
Abbreviations: 3D-MPRAGE, 3-dimensional magnetization-prepared rapid acquisition gradient echo; 3D-SNAP, 3D simultaneous noncontrast angiography and IPH; 3D-T1w FSE, 3-dimensional T1-weighted fast spin echo; 3D-TOF, 3D time-of-flight; DANTE, delay alternating with nutation for tailored excitation; DIR, double inversion recovery; FOV, field of view; MIP, maximum intensity projection; MPR, multiplanar reconstruction; QIR, quadruple inversion recovery; SOS, stack of stars; TI, inversion time; TR/TE, repetition time/echo time.