MRA Head Without Contrast 1.5T
Siemens Healthineers – Non-Contrast MR Protocols
Instructions And Patient Preparation
- Instructions
- This sequence is in addition to the Routine Adult Brain protocol
- Position
- Supine, head first
- Coil
- 20 channel Head/Neck coil or better
- Landmark
- Glabella
Imaging Parameters
| Scan Description | 3D TOF MRA |
|---|---|
| View Image | |
| Sequence Name | fl_r |
| Dimension | 3D |
| Acceleration Mode | GRAPPA |
| Acceleration Factor PE | 2 |
| Acceleration Factor 3D | 1 |
| AutoAlign | Head > Brain |
Acquisition Parameters
| Scan Description | 3D TOF MRA |
|---|---|
| TR | 23.4 ms |
| TE | 7.15 ms |
| Flip Angle | 23 deg |
| Bandwidth | 120 Hz/Px |
| Fat-Water Contrast | Standard |
| Gradient Mode | Fast |
| RF Pulse Type | Normal |
| Asymmetric Echo | Weak |
Scan Parameters
| Scan Description | 3D TOF MRA |
|---|---|
| Base Resolution | 320 |
| Phase Resolution | 80% |
| Slice Resolution | 50% |
| Averages | 1 |
| Concatenations | 6 |
| FoV Read | 200 mm |
| FoV Phase | 100% |
| Phase Encoding Dir. | R >> L |
| Slice Oversampling | 33% |
| Phase Oversampling | 20% |
| Slice Partial Fourier | Off |
| Phase Partial Fourier | Off |
| Flow Compensation | Slice/Read |
Scanning Range
| Scan Description | 3D TOF MRA |
|---|---|
| Raw Filter | Off |
| Elliptical Filter | Off |
| Distortion Correction | 2D |
| Normalize | B1 Filter |
| Image Filter | Off |
| Distance Factor | -31% |
| Slice Thickness | 0.6 mm |
| Slabs | 6 |
| Slices per Slab | 36 |
| Acquisition Time | 4:34 min |