MRA Head Without Contrast 3T
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 | AXIAL 3D TOF |
|---|---|
| View Image | |
| Sequence Name | fl_r |
| Sequence Type | Gre |
| Dimension | 3D |
| Acceleration Mode | CS |
| AutoAlign | Head > Brain |
Scan Parameters
| Scan Description | AXIAL 3D TOF |
|---|---|
| TR | 21.0 ms |
| TE | 3.69 ms |
| Flip Angle | 20 deg |
| Bandwidth | 187 Hz/Px |
| Fat-Water Contrast | Standard |
| Gradient Mode | Fast |
| RF Pulse Type | Normal |
| Asymmetric Echo | Weak |
Acquisition Parameters
| Scan Description | AXIAL 3D TOF |
|---|---|
| Base Resolution | 352 |
| Phase Resolution | 95% |
| Slice Resolution | 67% |
| Averages | 1 |
| Concatenations | 6 |
| FoV Read | 220 mm |
| FoV Phase | 91% |
| Phase Encoding Dir. | R >> L |
| Phase Oversampling | 0% |
| Slice Oversampling | 25% |
| Slice Partial Fourier | Off |
| Phase Partial Fourier | Off |
| Flow compensation | Slice/Read |
Scanning Range
| Scan Description | AXIAL 3D TOF |
|---|---|
| Elliptical Filter | Off |
| Filter | Distortion Corr.(2D), Prescan Normalize |
| Prescan Normalize | On |
| Distance Factor | -21% |
| Slice Thickness | 0.4 mm |
| Slabs | 6 |
| Slices per Slab | 48 |
| Acquisition Time | 4:31 min |