Rectal Cancer 1.5T
Siemens Healthineers – MR Gadopiclenol (VUEWAY®) Protocols
Instructions And Patient Preparation
- Instructions
- • Have patient empty bladder before scanning
• Optional: Patient could take a Fleet enema prior to appointment
• NPO for 4 hours prior to study recommended (reduces bowel motion)
• Small field of view imaging must be angled to the mass
• MD to check for Axial and Coronal Oblique angulations (true to rectal mass) - Common Indication
- Rectal cancer staging
- Position
- Supine; head or feet first
- Coil
- Body Array (anterior); Spine Array (posterior)
- Landmark
- Center of coil; below belly button; adjust after LOC using ISO mode imaging
Contrast Agent Parameters
| Contrast Agent | Dose | Injection Rate | Dose Timing Method and Scan Delay | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gadopiclenol (VUEWAY) | 0.05 mmol/kg | 2 mL/sec | Refer to postcontrast timing below | |||||||||
| Saline Flush | 20 mL | 2 mL/sec | — | |||||||||
| Comments | • Report agent administered and dose • Use minimal dose for patients with a GFR <30 mL/sec |
|||||||||||
Imaging Parameters
| Scan Description | 3 PLANE HASTE SCOUT |
SAGITTAL T2 Hi Res |
AXIAL DWI |
AXIAL OBLIQUE T2 Hi Res |
CORONAL OBLIQUE T2 Hi Res |
AXIAL IN OUT |
SAGITTAL VIBE Pre |
CORONAL VIBE Pre |
AXIAL VIBE Pre |
AXIAL VIBE Post 25 sec 60 sec 180 sec |
SAGITTAL VIBE Post 60 sec |
CORONAL VIBE Post 60 sec 180 min |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| View Image | View Image | View Image | View Image | View Image | View Image | View Image | View Image | View Image | View Image | View Image | ||
| Sequence Name | h | tse | epse | tse | tse | fl | — | fl | fl | fl | — | fl |
| Dimension | 2D | 2D | — | 2D | 2D | 3D | — | 3D | 3D | 3D | — | 3D |
| Acceleration Mode | GRAPPA | GRAPPA | GRAPPA | GRAPPA | GRAPPA | GRAPPA | — | GRAPPA | CAIPIRINHA | CAIPIRINHA | — | GRAPPA |
| Acceleration Factor PE | 2 | 2 | 2 | 2 | 2 | 2 | — | 2 | 2 | 2 | — | 2 |
Scan Parameters
| Scan Description | 3 PLANE HASTE SCOUT |
SAGITTAL T2 Hi Res |
AXIAL DWI |
AXIAL OBLIQUE T2 Hi Res |
CORONAL OBLIQUE T2 Hi Res |
AXIAL IN OUT |
SAGITTAL VIBE Pre |
CORONAL VIBE Pre |
AXIAL VIBE Pre |
AXIAL VIBE Post 25 sec 60 sec 180 sec |
SAGITTAL VIBE Post 60 sec |
CORONAL VIBE Post 60 sec 180 min |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TR | 1000.0 ms | 4440.0 ms | 6700.0 ms | 3910.0 ms | 3910.0 ms | 7.0 ms | — | 3.7 ms | 3.7 ms | 3.7 ms | — | 3.7 ms |
| TE | 121.0 ms | 107.0 ms | 76.0 ms | 107.0 ms | 107.0 ms | 1: 2.38 ms 2: 4.76 ms |
— | 1.88 ms | 1.88 ms | 1.88 ms | — | 1.88 ms |
| Flip Angle | 105 deg | 160 deg | — | 160 deg | 160 deg | 10 deg | — | 10 deg | 10 deg | 10 deg | — | 10 deg |
| Turbo Factor | 256 | 23 | — | 23 | 23 | — | — | — | — | — | — | — |
| Bandwidth | 698 Hz/Px | 200 Hz/Px | 1358 Hz/Px | 200 Hz/Px | 200 Hz/Px | 490 Hz/Px | — | 640 Hz/Px | 640 Hz/Px | 640 Hz/Px | — | 640 Hz/Px |
| Fat-Water Contrast | Standard | Standard | SPAIR | Standard | Standard | Standard | — | Fast Fat Saturation | Fast Fat Saturation | Fast Fat Saturation | — | Fast Fat Saturation |
| Fat Saturation | — | — | Strong | — | — | — | — | — | — | — | — | — |
| Gradient Mode | Fast | Normal | Fast | Normal | Normal | Fast | — | Fast | Fast | Fast | — | Fast |
| RF Pulse Type | Normal | Normal | Normal | Normal | Normal | Fast | — | Fast | Fast | Fast | — | Fast |
| Asymmetric Echo | — | — | — | — | — | Off | — | Off | Off | Off | — | Off |
Acquisition Parameters
| Scan Description | 3 PLANE HASTE SCOUT |
SAGITTAL T2 Hi Res |
AXIAL DWI |
AXIAL OBLIQUE T2 Hi Res |
CORONAL OBLIQUE T2 Hi Res |
AXIAL IN OUT |
SAGITTAL VIBE Pre |
CORONAL VIBE Pre |
AXIAL VIBE Pre |
AXIAL VIBE Post 25 sec 60 sec 180 sec |
SAGITTAL VIBE Post 60 sec |
CORONAL VIBE Post 60 sec 180 min |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Base Resolution | 256 | 320 | 160 | 320 | 320 | 320 | — | 288 | 288 | 288 | — | 288 |
| Phase Resolution | 100% | 100% | 100% | 100% | 100% | 75% | — | 75% | 75% | 75% | — | 75% |
| Slice Resolution | — | — | — | — | — | 50% | — | 61% | 60% | 60% | — | 61% |
| Averages | 1 | 3 | 1, 3 | 2 | 3 | 1 | — | 1 | 1 | 1 | — | 1 |
| Concatenations | 1 | 2 | 1 | 3 | 2 | 1 | — | 1 | 1 | 1 | — | 1 |
| b-value | — | — | 0 s/mm2 50 s/mm2 800 s/mm2 |
— | — | — | — | — | — | — | — | — |
| FoV Read | 380 mm | 190 mm | 380 mm | 190 mm | 190 mm | 380 mm | — | 335 mm | 335 mm | 335 mm | — | 335 mm |
| FoV Phase | 100% | 100% | 80% | 100% | 100% | 78% | — | 100% | 81% | 81% | — | 100% |
| Phase Encoding Dir. | R >> L | H >> F | A >> P | R >> L | A >> P | A >> P | — | R >> L | A >> P | A >> P | — | R >> L |
| Phase Oversampling | 50% | 100% | 0% | 100% | 100% | 0% | — | 20% | 20% | 20% | — | 20% |
| Slice Oversampling | — | — | — | — | — | 13% | — | 0% | 33% | 33% | — | 0% |
| Phase Partial Fourier | 5/8 | Off | 6/8 | Off | Off | 7/8 | — | 6/8 | 6/8 | 6/8 | — | 6/8 |
| Slice Partial Fourier | — | — | — | — | — | 6/8 | — | 6/8 | 6/8 | 6/8 | — | 6/8 |
| Flow Compensation | None | None | — | None | None | — | — | — | — | — | — | — |
Scanning Range
| Scan Description | 3 PLANE HASTE SCOUT |
SAGITTAL T2 Hi Res |
AXIAL DWI |
AXIAL OBLIQUE T2 Hi Res |
CORONAL OBLIQUE T2 Hi Res |
AXIAL IN OUT |
SAGITTAL VIBE Pre |
CORONAL VIBE Pre |
AXIAL VIBE Pre |
AXIAL VIBE Post 25 sec 60 sec 180 sec |
SAGITTAL VIBE Post 60 sec |
CORONAL VIBE Post 60 sec 180 min |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Elliptical Filter | Off | Off | Off | Off | Off | Off | — | Off | Off | Off | — | Off |
| Normalize | Prescan | Prescan | Off | Prescan | Prescan | Prescan | — | Prescan | Prescan | Prescan | — | Prescan |
| Raw Filter | Off | Off | Off | Off | Off | Off | — | Off | Off | Off | — | Off |
| Distortion Correction | 2D | 2D | 2D | 2D | 2D | 2D | — | 2D | 2D | 2D | — | 2D |
| Slice Thickness | 6.0 mm | 3.0 mm | 7.0 mm | 3.0 mm | 3.0 mm | 3.0 mm | — | 3.0 mm | 3.0 mm | 3.0 mm | — | 3.0 mm |
| Distance Factor | 150% | 0% | 20% | 0% | 0% | 20% | — | 20% | 20% | 20% | — | 20% |
| Slices | Slices 13 | Slices 34 | Slices 32 | Slices 45 | Slices 30 | Slices per Slab 64 |
— | Slices per Slab 72 |
Slices per Slab 72 |
Slices per Slab 72 |
— | Slices per Slab 72 |
| Time of Acquisition | 34 sec | 6:23 min | 1:42 min | 5:42 min | 5:38 min | 21 sec | — | 17 sec | 10 sec | 10 sec | — | 17 sec |