MRA Neck 1.5T
Siemens Healthineers – MR Gadopiclenol (VUEWAY®) Protocols
Instructions And Patient Preparation
- Instructions
- These 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 | TWIST CORONAL – Inject 1-2 mL contrast Inject remaining contrast – Post CE MRA – 2 measurements |
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| Saline Flush | 20 mL | 1-1.5 mL/sec | |||
| 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 | MRA Neck 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 | se | fl | fldyn | fl |
| Dimension | 3D | Off | 3D | 3D | 3D |
| Acceleration Mode | GRAPPA | ― | GRAPPA | GRAPPA | GRAPPA |
| Acceleration Factor PE | 2 | ― | 3 | 2 | 3 |
| Acceleration Factor 3D | 1 | ― | 1 | 1 | 1 |
Acquisition Parameters
| Scan Description | MRA Neck 3D TOF |
AXIAL T1 Fat Sat Black Blood |
Pre CE MRA |
CORONAL TWIST |
Post CE MRA |
|---|---|---|---|---|---|
| TR | 26.0 ms | 627.0 ms | 3.28 ms | 2.76 ms | 3.28 ms |
| TE | 4.87 ms | 17.00 ms | 1.26 ms | 1.03 ms | 1.26 ms |
| Flip Angle | 20 deg | 90 deg | 25 deg | 25 deg | 25 deg |
| Bandwidth | 103 Hz/Px | 150 Hz/Px | 590 Hz/Px | 650 Hz/Px | 590 Hz/Px |
| Echo Spacing | 13.48 ms | ― | ― | ― | ― |
| Fat-Water Contrast | Standard | Fat Saturation | Standard | Standard | Standard |
| Fat Saturation | ― | Strong | ― | ― | ― |
| Gradient Mode | Fast | Fast | Fast | Fast | Fast |
| RF Pulse Type | Normal | Normal | Normal | Normal | Normal |
| Asymmetric Echo | Weak | Allowed | Allowed | Strong | Allowed |
Scan Parameters
| Scan Description | MRA Neck 3D TOF |
AXIAL T1 Fat Sat Black Blood |
Pre CE MRA |
CORONAL TWIST |
Post CE MRA |
|---|---|---|---|---|---|
| Base Resolution | 320 | 320 | 384 | 256 | 384 |
| Phase Resolution | 65% | 80% | 82% | 85% | 82% |
| Slice Resolution | 63% | ― | 61% | 54% | 61% |
| Averages | 1 | 1 | 1 | ― | 1 |
| Concatenations | 8 | 2 | ― | ― | ― |
| FoV Read | 190 mm | 230 mm | 370 mm | 400 mm | 370 mm |
| FoV Phase | 75% | 50% | 81% | 75% | 81% |
| Phase Encoding Dir. | A >> P | A >> P | R >> L | R >> L | R >> L |
| Slice Oversampling | 23% | ― | 13% | 20% | 13% |
| Phase Oversampling | 30% | 80% | 0% | 0% | 0% |
| Slice Partial Fourier | 6/8 | ― | 6/8 | 6/8 | 6/8 |
| Phase Partial Fourier | Off | ― | Off | 6/8 | Off |
| Flow Compensation | Slice/Read | ― | ― | ― | ― |
Scanning Range
| Scan Description | MRA Neck 3D TOF |
AXIAL T1 Fat Sat Black Blood |
Pre CE MRA |
CORONAL TWIST |
Post CE MRA |
|---|---|---|---|---|---|
| Elliptical Filter | On | On | Off | On | Off |
| Normalize | Prescan | Prescan | Prescan | Prescan | Prescan |
| Distortion Correction | 2D | 2D | 2D | 2D | 2D |
| Distance Factor | -35% | 30% | 20% | ― | 20% |
| Slice Thickness | 1.0 mm | 5.0 mm | 0.8 mm | 1.6 mm | 0.8 mm |
| Slices | 26 Slices per Slab | 20 Slices | 128 Slices per Slab | 80 Slices per Slab | 128 Slices per Slab |
| Time to center | ― | ― | 6.0 s | 8.8 s | 6.0 s |
| Acquisition Time | 6:18 min | 4:56 min | 24 sec | 2:39 min | 24 sec |