MR Venography Head 1.5T
Siemens Healthineers – MR Gadopiclenol (VUEWAY®) Protocols
Instructions And Patient Preparation
- Instructions
- • The following sequences are in addition to the Routine Adult Brain protocol
• MRA may be added for hyperacute stroke - Position
- Supine, head first
- Coil
- 20 channel Head/Neck coil or better
- Landmark
- Glabella
Contrast Agent Parameters
| Contrast Agent | Dose | Injection Rate | ||
|---|---|---|---|---|
| Gadopiclenol (VUEWAY) | 0.05 mmol/kg | TWIST Coronal – Inject 1-2 mL contrast Inject remaining contrast – Post CE MRV – 2 measurements |
||
| Saline Flush | 20 mL | 1-1.5 mL/sec (CEMRA) / 3-4mL/sec (DSC Perfusion) | ||
| Comments | • For bifurcations. Noncontrast. 3D TOF if unable to do Carotid CE MRA or CE MRA is inadequate • Noncontrast. VENC=15. Alternative to use Coronal plane with longer acquisition but more optimal raw data imaging • Report agent administered and dose • Use minimal dose for patients with a GFR <60 mL/sec |
|||
Imaging Parameters
| Scan Description | SAGITTAL 3D PC Venogram |
Pre CE MRV |
CORONAL TWIST Inject 1-2 mL Contrast |
Post CE MRV Inject Remaining Contrast 2 Measurements |
|---|---|---|---|---|
| View Image | View Image | View Image | View Image | |
| Sequence Name | fi | fl | fldyn | fl |
| Dimension | 3D | 3D | 3D | 3D |
| Acceleration Mode | GRAPPA | GRAPPA | GRAPPA | GRAPPA |
| Acceleration Factor PE | 2 | 2 | 2 | 2 |
| Acceleration Factor 3D | 1 | 2 | 2 | 2 |
| AutoAlign | ― | Head > Basis | Head > Basis | Head > Basis |
Acquisition Parameters
| Scan Description | SAGITTAL 3D PC Venogram |
Pre CE MRV |
CORONAL TWIST |
Post CE MRV |
|---|---|---|---|---|
| TR | 61.7 ms | 3.95 ms | 2.38 ms | 3.95 ms |
| TE | 10.20 ms | 1.49 ms | 1.04 ms | 1.49 ms |
| Flip Angle | 15 deg | 25 deg | 15 deg | 25 deg |
| Bandwidth | 300 Hz/Px | 450 Hz/Px | 720 Hz/Px | 450 Hz/Px |
| Fat-Water Contrast | ― | Standard | Standard | Standard |
| Gradient Mode | Fast | Fast | Fast | Fast |
| RF Pulse Type | Normal | Normal | Fast | Normal |
| Asymmetric Echo | Weak | Allowed | Strong | Allowed |
Scan Parameters
| Scan Description | SAGITTAL 3D PC Venogram |
Pre CE MRV |
TWIST CORONAL |
Post CE MRV |
|---|---|---|---|---|
| Base Resolution | 256 | 288 | 256 | 288 |
| Phase Resolution | 75% | 82% | 75% | 82% |
| Slice Resolution | 50% | 70% | 75% | 70% |
| Averages | 1 | 1 | ― | 1 |
| Concatenations | 1 | ― | ― | ― |
| FoV Read | 220 mm | 240 mm | 300 mm | 240 mm |
| FoV Phase | 100% | 75% | 56% | 75% |
| Phase Encoding Dir. | A >> P | R >> L | R >> L | R >> L |
| Slice Oversampling | 0% | 20% | 17% | 20% |
| Phase Oversampling | 0% | 0% | 0% | 0% |
| Slice Partial Fourier | ― | Off | 7/8 | Off |
| Phase Partial Fourier | Off | 7/8 | 7/8 | 7/8 |
| Flow Compensation | None | ― | ― | ― |
Scanning Range
| Scan Description | SAGITTAL 3D PC Venogram |
Pre CE MRV |
TWIST CORONAL |
Post CE MRV |
|---|---|---|---|---|
| Elliptical Filter | On | Off | On | Off |
| Normalize | Off | Prescan | Off | Prescan |
| Distortion Correction | 2D | 2D | 2D | 2D |
| Distance Factor | 20% | 20% | ― | 20% |
| Slice Thickness | 1.0 mm | 1.0 mm | 1.7 mm | 1.0 mm |
| Slices per Slab | 144 | 160 | 96 | 160 |
| Time to center | ― | 6.0 s | 6.1 s | 6.0 s |
| Acquisition Time | 8:01 min | 27 sec | 1:05 min | 27 sec |