Perianal Fistula 1.5T
Siemens Healthineers – MR Gadopiclenol (VUEWAY®) Protocols
Instructions And Patient Preparation
- Instructions
- • Have patient empty bladder before scanning
• Cover pelvis, particularly through soft tissue past the rectum area - Common Indications
- Suspected perianal fistula, perianal abscess, Crohn’s disease, rectovaginal or rectovesicular fistula
- 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 delay times 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 |
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Imaging Parameters
| Scan Description | 3 PLANE HASTE SCOUT | SAGITTAL OBLIQUE T2 |
AXIAL T2 TSE Fat Sat |
CORONAL T2 TSE |
AXIAL T2 TSE Non Fat Sat Large FOV |
AXIAL DWI |
AXIAL 3D IN OUT CAIPI |
SAGITTAL VIBE Pre |
CORONAL VIBE Pre |
AXIAL VIBE Pre CAIPI Small FOV |
AXIAL VIBE Post CAIPI 30 sec 60 sec |
AXIAL VIBE Post Large FOV 180 sec |
CORONAL VIBE Post CAIPI 60 sec |
SAGITTAL VIBE Post 180 sec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| View Image | View Image | 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 | tse | tse | tse | epse | fl | fl | fl | fl | fl | fl | fl | fl |
| Dimension | 2D | 2D | 2D | 2D | 2D | — | 3D | 3D | 3D | 3D | 3D | 3D | 3D | 3D |
| Acceleration Mode | GRAPPA | GRAPPA | GRAPPA | GRAPPA | GRAPPA | GRAPPA | CAIPIRINHA | GRAPPA | CAIPIRINHA | CAIPIRINHA | CAIPIRINHA | CAIPIRINHA | CAIPIRINHA | GRAPPA |
| Acceleration Factor PE | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
Scan Parameters
| Scan Description | 3 PLANE HASTE SCOUT | SAGITTAL OBLIQUE T2 |
AXIAL T2 TSE Fat Sat |
CORONAL T2 TSE |
AXIAL T2 TSE Non Fat Sat Large FOV |
AXIAL DWI |
AXIAL 3D IN OUT CAIPI |
SAGITTAL VIBE Pre |
CORONAL VIBE Pre |
AXIAL VIBE Pre CAIPI Small FOV |
AXIAL VIBE Post CAIPI 30 sec 60 sec |
AXIAL VIBE Post Large FOV 180 sec |
CORONAL VIBE Post CAIPI 60 sec |
SAGITTAL VIBE Post 180 sec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TR | 1000 ms | 7000 ms | 7940 ms | 7440 ms | 5710 ms | 4300 ms | 6.7 ms | 4.4 ms | 4.4 ms | 4.5 ms | 4.5 ms | 3.5 ms | 4.4 ms | 4.4 ms |
| TE | 121 ms | 113 ms | 108 ms | 115 ms | 113 ms | 85 ms | 1: 2.39 ms 2: 4.77 ms |
2.24 ms | 2.24 ms | 2.3 ms | 2.3 ms | 1.78 ms | 2.24 ms | 2.24 ms |
| Flip Angle | 105 deg | 160 deg | 160 deg | 160 deg | 160 deg | — | 10 deg | 10 deg | 10 deg | 10 deg | 10 deg | 10 deg | 10 deg | 10 deg |
| Turbo Factor | 256 | 23 | 23 | 25 | 23 | — | — | — | — | — | — | — | — | — |
| Bandwidth | 698 Hz/Px | 200 Hz/Px | 200 Hz/Px | 199 Hz/Px | 199 Hz/Px | 1144 Hz/Px | 510 Hz/Px | 450 Hz/Px | 450 Hz/Px | 450 Hz/Px | 450 Hz/Px | 640 Hz/Px | 450 Hz/Px | 450 Hz/Px |
| Fat-Water Contrast | Standard | Standard | Fat Saturation | Standard | Standard | SPAIR | Dixon | Fast Fat Saturation | Fast Fat Saturation | Fast Fat Saturation | Fast Fat Saturation | Fast Fat Saturation | Fast Fat Saturation | Fast Fat Saturation |
| Fat Saturation | — | — | Strong | — | — | Strong | — | — | — | — | — | — | — | — |
| Gradient Mode | Fast | Normal | Normal | Normal | Normal | Fast | Fast | Fast | Fast | Fast | Fast | Fast | Fast | Fast |
| RF Pulse Type | Normal | Low SAR | Low SAR | Low SAR | Low SAR | Low SAR | Fast | Fast | Fast | Fast | Fast | Fast | Fast | Fast |
| Asymmetric Echo | — | — | — | — | — | — | Strong | Off | Off | Off | Off | Off | Off | Off |
Acquisition Parameters
| Scan Description | 3 PLANE HASTE SCOUT | SAGITTAL OBLIQUE T2 |
AXIAL T2 TSE Fat Sat |
CORONAL T2 TSE |
AXIAL T2 TSE Non Fat Sat Large FOV |
AXIAL DWI |
AXIAL 3D IN OUT CAIPI |
SAGITTAL VIBE Pre |
CORONAL VIBE Pre |
AXIAL VIBE Pre CAIPI Small FOV |
AXIAL VIBE Post CAIPI 30 sec 60 sec |
AXIAL VIBE Post Large FOV 180 sec |
CORONAL VIBE Post CAIPI 60 sec |
SAGITTAL VIBE Post 180 sec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Base Resolution | 256 | 320 | 320 | 256 | 256 | 112 | 288 | 288 | 288 | 288 | 288 | 288 | 288 | 288 |
| Phase Resolution | 100% | 83% | 86% | 93% | 86% | 100% | 80% | 75% | 75% | 75% | 75% | 75% | 75% | 75% |
| Slice Resolution | — | — | — | — | — | — | 60% | 60% | 61% | 60% | 60% | 60% | 61% | 60% |
| Averages | 1 | 3 | 2 | 2 | 3 | 2, 4 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Concatenations | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| b-value | — | — | — | — | — | 0 s/mm2 50 s/mm2 800 s/mm2 |
— | — | — | — | — | — | — | — |
| FoV Read | 380 mm | 275 mm | 240 mm | 240 mm | 300 mm | 240 mm | 380 mm | 300 mm | 300 mm | 280 mm | 280 mm | 380 mm | 300 mm | 300 mm |
| FoV Phase | 100% | 100% | 100% | 100% | 100% | 100% | 92% | 92% | 100% | 81% | 81% | 92% | 100% | 92% |
| Phase Encoding Dir. | R >> L | A >> P | R >> L | R >> L | R >> L | A >> P | A >> P | A >> P | R >> L | A >> P | A >> P | A >> P | R >> L | A >> P |
| Phase Oversampling | 50% | 20% | 100% | 100% | 40% | 10% | 30% | 20% | 30% | 20% | 20% | 30% | 30% | 20% |
| Slice Oversampling | — | — | — | — | — | — | 33% | 0% | 27% | 60% | 60% | 33% | 27% | 0 |
| Phase Partial Fourier | 5/8 | Off | Off | Off | Off | 6/8 | 6/8 | 6/8 | 6/8 | 6/8 | 6/8 | 6/8 | 6/8 | 6/8 |
| Slice Partial Fourier | — | — | — | — | — | — | 6/8 | 6/8 | 6/8 | 6/8 | 6/8 | 6/8 | 6/8 | 6/8 |
| Flow Compensation | None | None | None | None | None | — | — | — | — | — | — | — | — | — |
Scanning Range
| Scan Description | 3 PLANE HASTE SCOUT | SAGITTAL OBLIQUE T2 |
AXIAL T2 TSE Fat Sat |
CORONAL T2 TSE |
AXIAL T2 TSE Non Fat Sat Large FOV |
AXIAL DWI |
AXIAL 3D IN OUT CAIPI |
SAGITTAL VIBE Pre |
CORONAL VIBE Pre |
AXIAL VIBE Pre CAIPI Small FOV |
AXIAL VIBE Post CAIPI 30 sec 60 sec |
AXIAL VIBE Post Large FOV 180 sec |
CORONAL VIBE Post CAIPI 60 sec |
SAGITTAL VIBE Post 180 sec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Elliptical Filter | Off | Off | Off | Off | Off | Off | Off | Off | Off | Off | Off | Off | Off | Off |
| Normalize | Prescan | Prescan | Prescan | Prescan | Prescan | Off | Prescan | Prescan | Prescan | Prescan | Prescan | Prescan | Prescan | Prescan |
| Raw Filter | Off | Off | Off | Off | Off | On | Off | Off | Off | Off | Off | Off | Off | Off |
| Distortion Correction | 2D | 2D | 2D | 2D | 2D | 2D | 2D | 2D | 2D | 2D | 2D | 2D | 2D | 2D |
| Slice Thickness | 6.0 mm | 4.0 mm | 4.0 mm | 4.0 mm | 5.0 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 | 3.0 mm |
| Distance Factor | 150% | 20% | 20% | 20% | 20% | 0% | 20% | 20% | 20% | 20% | 20% | 20% | 20% | 20% |
| Slices | Slices 13 | Slices 24 | Slices 20 | Slices 25 | Slices 20 | Slices 20 | Slices per Slab 72 |
Slices per Slab 60 |
Slices per Slab 88 |
Slices per Slab 60 |
Slices per Slab 60 |
Slices per Slab 72 |
Slices per Slab 88 |
Slices per Slab 60 |
| Time of Acquisition | 34 sec | 2:36 min | 3:28 min | 2:38 min | 2:07 min | 1:40 min | 18 sec | 16 sec | 17 sec | 12 sec | 12 sec | 11 sec | 17 sec | 16 sec |