Perianal Fistula 3.0T
GE Healthcare – MR Gadopiclenol (VUEWAY®) Protocols
Instructions And Patient Preparation
- Instructions
- • Center at pubic symphysis/greater trochanters to include the entire anus
• For metal artifacts consider 1.5T
• Oblique axis refers to the sphincter - Common Indications
- Perianal fistula, abscess, rectovaginal/rectovesical fistula
- Position
- Supine
- Coil
- 32 channel Torso, GEMS Body array, or Air coil
- Landmark
- Iliac Crest
Contrast Agent Parameters
| Contrast Agent | Dose | Injection Rate | Dose Timing Method and Scan Delay | |||||
|---|---|---|---|---|---|---|---|---|
| Gadopiclenol (VUEWAY) | 0.05 mmol/kg up to a calculated volume of 10 mL | 2 mL/sec | Pre – 1 min | |||||
| Saline Flush | 50 mL | 2 mL/sec | Immediately following gadolinium | |||||
| Comments | — | — | Rectum to perineum | Rectum to perineum | Rectum to perineum | Pre, 1 min, No breath hold |
Post | Optional: For surg. material |
Imaging Parameters
| Scan Description | 3PL LOCALIZER SSFSE |
SAGITTAL T2 |
AXIAL OBLIQUE w/wo Fat Sat T2 FSE |
CORONAL OBLIQUE w/wo Fat Sat T2 FSE |
AXIAL T2 CUBE Fat Sat |
Post OBLIQUE AXIAL T1 3D |
Post OBLIQUE CORONAL T1 3D |
AXIAL In/Out Phase |
|---|---|---|---|---|---|---|---|---|
| View Image | View Image | View Image | View Image | View Image | View Image | |||
| Mode | 2D | 2D | 2D | 2D | 3D | 3D | 3D | 3D |
| Pulse Sequence | SSFSE | FRFSE-XL | FRFSE-XL | FRFSE-XL | CUBE T2 | LAVA-Flex | LAVA-Flex | FAST GRE |
| Imaging Options | EDR, SEQ, SS, FAST, ARC |
FC, TRF, FAST, FR |
FC, TRf, FAST, FR |
NPW, FC, TRf, FAST, FR |
EDR, FAST, FR, ZIP512, ZIP2, ARC | EDR, FAST, ZIP512, ZIP2, Flex | EDR, FAST, ZIP512, ZIP2, Flex | EDR, FAST, ZIP, ARC |
Scan Parameters
| Scan Description | 3PL LOCALIZER SSFSE |
SAGITTAL T2 |
AXIAL OBLIQUE w/wo Fat Sat T2 FSE |
CORONAL OBLIQUE w/wo Fat Sat T2 FSE |
AXIAL T2 CUBE Fat Sat |
Post OBLIQUE AXIAL T1 3D |
Post OBLIQUE CORONAL T1 3D |
AXIAL In/Out Phase |
|---|---|---|---|---|---|---|---|---|
| TE | 90 | 103 | 103 | 103 | 90 | Min Full | Min Full | #TEs 2 TE 1 Min (1.1) TE 2 2.3 |
| TR | Min | 4000 | 3500 | 3500 | 2500 | Def | Def | Def (4) |
| Flip Angle | — | — | — | — | — | 15 | 15 | — |
| ETL | — | 23 | 21 | 21 | 120 | — | — | 15 |
| Bandwidth | 83 | 62 | 62 | 62 | 62 | 142 | 62 | — |
| SAT | — | Chem Sat Fat | Chem Sat Fat | Chem Sat Fat | Chem Sat Fat | — | — | 143 |
Acquisition Parameters
| Scan Description | 3PL LOCALIZER SSFSE |
SAGITTAL T2 |
AXIAL OBLIQUE w/wo Fat Sat T2 FSE |
CORONAL OBLIQUE w/wo Fat Sat T2 FSE |
AXIAL T2 CUBE Fat Sat |
Post OBLIQUE AXIAL T1 3D |
Post OBLIQUE CORONAL T1 3D |
AXIAL In/Out Phase |
|---|---|---|---|---|---|---|---|---|
| MATRIX freq | 320 | 384 | 320 | 320 | 256 | 256 | 232 | 288 |
| MATRIX phase | 224 | 256 | 224 | 224 | 256 | 224 | 224 | 224 |
| NEX | 1 | 2 | 2 | 2 | 1 | 1 | 1 | 0.9 |
| Phase FOV | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0.75 |
| Freq Direction | — | S/I | R/L | S/I | R/L | R/L | S/I | drR/L |
| Accel | Ph 2 | — | — | — | Ph 2, Sl 2 | — | — | Ph 2, Sl 2 |
| Adv CV | 1, 240, 1 | Fat Sat Eff 1 Cl annefact 1 |
Fat Sat Eff 1 Cl annefact 1 |
Fat Sat Eff 1 Cl annefact 1 |
— | User CV: Turbo 2 Centric 1 |
User CV: Turbo 2 Centric 1 |
— |
Scanning Range
| Scan Description | 3PL LOCALIZER SSFSE |
SAGITTAL T2 |
AXIAL OBLIQUE w/wo Fat Sat T2 FSE |
CORONAL OBLIQUE w/wo Fat Sat T2 FSE |
AXIAL T2 CUBE Fat Sat |
Post OBLIQUE AXIAL T1 3D |
Post OBLIQUE CORONAL T1 3D |
AXIAL In/Out Phase |
|---|---|---|---|---|---|---|---|---|
| FOV | 48 | 36 | 26 | 26 | 26 | 28 | 28 | 36 |
| Slice Thickness | 8 | 2.4 | 2.4 | 2.4 | 1.8 | 2.6 | 2.6 | 3.6 |
| Spacing | 0 | .2 | .2 | .2 | 0 | 0 | 0 | 1 |
| Number of Slices | 21 Slices | Slices PRN | 14 Slices/acq | 13 Slices/acq | — | 80 Slices | 80 Slices | 19 Slices/acq |
| Approx. Scan Time | 0:30 | 4:00 ± | 4:00 ± | 4:00 ± | 5:00 ± | 1:30 | 1:30 | 0:23 per BH |