MRA Neck 3T
Siemens Healthineers – MR Gadopiclenol (VUEWAY®) Protocols
Instructions And Patient Preparation
- Instructions
- The following sequences are in addition to the Routine Adult Brain protocol
- 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 | CORONAL TWIST Inject 1-2 mL contrast Inject remaining contrast CE MRV Post – 2 measurements |
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| Saline Flush | 20 mL | 1-1.5 mL/sec (CEMRA) / 3-4 mL/sec (DSC Perfusion) | |||
| Comments | • Report agent administered and dose • Use minimal dose for patients with a GFR <60 mL/sec |
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Imaging Parameters
| Scan Description | AXIAL 3D TOF |
AXIAL T1 Fat Sat Black Blood (When requested) |
Pre CE MRA |
CORONAL TWIST Inject 1-2 mL Contrast |
Post CE MRA Inject Remaining Contrast 2 Measurements |
|---|---|---|---|---|---|
| View Image | View Image | View Image | View Image | View Image | |
| Sequence Name | fl_r | tse | fl | fldyn | fl |
| Mode | 2D | 2D | 2D | 2D | 2D |
| PAT Mode | GRAPPA | GRAPPA | GRAPPA | GRAPPA | GRAPPA |
| Dimension | 3D | 2D | 3D | 3D | 3D |
| Acceleration Factor PE | 2 | 2 | 3 | 2 | 3 |
| Acceleration Factor 3D | 1 | ― | 1 | 2 | 1 |
Scan Parameters
| Scan Description | AXIAL 3D TOF |
AXIAL T1 Fat Sat Black Blood |
Pre CE MRA |
TWIST TIMING |
Post CE MRA |
|---|---|---|---|---|---|
| TR | 20.0 ms | 746.0 ms | 3.34 ms | 2.19 ms | 3.34 ms |
| TE | 3.16 ms | 13 ms | 1.23 ms | 0.89 ms | 1.23 ms |
| Flip Angle | 20 deg | 180 deg | 25 deg | 18 deg | 25 deg |
| Turbo Factor | ― | 3 | ― | ― | ― |
| Bandwidth | 250 Hz/Px | 130 Hz/Px | 590 Hz/Px | 720 Hz/Px | 590 Hz/Px |
| Fat Saturation Mode | ― | Strong | ― | ― | ― |
| Fat Suppression | None | Fat sat. | None | None | None |
| Water Suppression | None | None | ― | ― | ― |
| Gradient Mode | Fast | Fast | Fast | Fast | Fast |
| RF Pulse Type | ― | Normal | Normal | Fast | Normal |
| Asymmetric Echo | Allowed | ― | Allowed | Strong | Allowed |
Acquisition Parameters
| Scan Description | AXIAL 3D TOF |
AXIAL T1 Fat Sat Black Blood |
Pre CE MRA |
TWIST TIMING |
Post CE MRA |
|---|---|---|---|---|---|
| Base Resolution | 384 | 448 | 448 | 288 | 448 |
| Phase Resolution | 65% | 50% | 82% | 75% | 82% |
| Slice Resolution | 63% | 100% | 61% | 75% | 61% |
| Averages | 1 | ― | 1 | ― | 1 |
| Averaging Mode | Short term | Short term | Short term | ― | Short term |
| Concatenations | 8 | 3 | ― | ― | ― |
| FoV Read | 190 mm | 250 mm | 350 mm | 350 mm | 350 mm |
| FoV Phase | 100% | 78% | 81% | 75% | 81% |
| Phase Encoding Dir. | A >> P | A >> P | R >> L | R >> L | R >> L |
| Phase Oversampling | 10% | 75% | 0% | 0% | 0% |
| Slice Oversampling | 23% | ― | 13% | 13% | 13% |
| Phase Partial Fourier | Off | Off | 6/8 | 6/8 | 6/8 |
| Slice Partial Fourier | 6/8 | ― | 6/8 | 6/8 | 6/8 |
| Flow Compensation | Yes | No | ― | ― | ― |
Scanning Range
| Scan Description | AXIAL 3D TOF |
AXIAL T1 Fat Sat Black Blood |
Pre CE MRA |
TWIST TIMING |
Post CE MRA |
|---|---|---|---|---|---|
| Elliptical Filter | On | Off | Off | On | Off |
| Filter | Distortion Corr.(2D), Prescan Normalize, Elliptical filter |
Distortion Corr.(2D) | Distortion Corr.(2D), Prescan Normalize |
Distortion Corr.(2D), Elliptical filter |
Distortion Corr.(2D), Prescan Normalize |
| Normalize | Off | Off | Off | Off | Off |
| Prescan Normalize | On | Off | On | Off | On |
| Distortion Correction | On | On | On | On | On |
| Distance Factor | -35% | 20% | 20% | ― | 20% |
| Slice Thickness | 1.0 mm | 5.0 mm | 0.75 mm | 1.33 mm | 0.75 mm |
| Slices | 26 Slices per Slab | 35 Slices | 128 Slices per Slab | 128 Slices per Slab | 128 Slices per Slab |
| Acquisition Time | 6:47 min | 2:07 min | 23 sec | 1:09 min | 46 sec |