Instructions And Patient Preparation
- Anatomical Region
- Perirectal Fistula
- Field Strength
- 3.0T
- Coil
- See the Coil Configuration row in the first parameters table below (varies by sequence).
- Position & Landmark
- Feet first, supine. Landmark: center of the coil in use (typically central to the ROI).
- Contrast
- Weight-based gadolinium contrast per your institution’s protocol, supervising radiologist, and the agent’s FDA prescribing information. Postcontrast sequences are marked +C.
Patient Position
| Scan Description | 3pl Loc | Sag T2 Fat | Obl Ax T2 Fat | Obl Cor T2 Fat | Obl Cor T2 | Ax DWI Pel b50, 400, 700 | Obl Ax T1 Pre | Obl Ax T1 70sec | Obl Cor T1 Post | Ax T1 Post 1mm |
|---|---|---|---|---|---|---|---|---|---|---|
| Coil Configuration | GE40chGEMPA, GE16chTDIAA | GE40chGEMPA, GE16chTDIAA | GE40chGEMPA, GE16chTDIAA | GE40chGEMPA, GE16chTDIAA | GE40chGEMPA, GE16chTDIAA | GE16chAirAA, GE40chGEMPA | GE40chGEMPA, GE16chTDIAA | GE40chGEMPA, GE16chTDIAA | GE40chGEMPA, GE16chTDIAA | GE40chGEMPA, GE16chTDIAA |
| Plane | 3-PLANE | SAGITTAL | OBLIQUE | OBLIQUE | OBLIQUE | AXIAL | OBLIQUE | OBLIQUE | OBLIQUE | OBLIQUE |
Imaging Parameters
| Scan Description | 3pl Loc | Sag T2 Fat | Obl Ax T2 Fat | Obl Cor T2 Fat | Obl Cor T2 | Ax DWI Pel b50, 400, 700 | Obl Ax T1 Pre | Obl Ax T1 70sec | Obl Cor T1 Post | Ax T1 Post 1mm |
|---|---|---|---|---|---|---|---|---|---|---|
| View Image | View Image | View Image | View Image | View Image | View Image | View Image | View Image | View Image | ||
| Imaging Mode | 2D | 2D | 2D | 2D | 2D | 2D | 3D | 3D | 3D | 3D |
| Imaging Options | Seq, EDR, Fast, SS, ARC | FC, TRF, Fast, FR | FC, TRF, Fast, FR | FC, TRF, Fast, FR | FC, EDR, TRF, Fast, FR, ARC | EDR, RT, Asset | EDR, Fast, ZIP512, Flex | EDR, Fast, ZIP512, Flex | EDR, Fast, ZIP512, Flex | EDR, Fast, ZIP512, ARC, Flex |
| Pulse Sequence | Spin Echo | FSE-XL | FSE-XL | FSE-XL | FSE-XL | DW EPI | LAVA | LAVA | LAVA | LAVA |
| ARC Phase | 2 | ― | ― | ― | 1.5 | ― | ― | ― | ― | 1.5 |
| Phase | ― | ― | ― | ― | ― | 2 | ― | ― | ― | ― |
| ARC Slice | ― | ― | ― | ― | ― | ― | ― | ― | ― | 1 |
Image Recon
| Scan Description | 3pl Loc | Sag T2 Fat | Obl Ax T2 Fat | Obl Cor T2 Fat | Obl Cor T2 | Ax DWI Pel b50, 400, 700 | Obl Ax T1 Pre | Obl Ax T1 70sec | Obl Cor T1 Post | Ax T1 Post 1mm |
|---|---|---|---|---|---|---|---|---|---|---|
| Recon DL Strength | Off | Medium | Medium | Medium | Medium | Medium | ― | ― | Off | Off |
| Intensity Correction | NONE | PURE | PURE | PURE | PURE | PURE | PURE | PURE | PURE | PURE |
| Intensity Filter | None | None | None | None | None | None | None | None | None | None |
| Save Original | Off | On | On | On | On | Off | On | On | On | On |
Scan Range
| Scan Description | 3pl Loc | Sag T2 Fat | Obl Ax T2 Fat | Obl Cor T2 Fat | Obl Cor T2 | Ax DWI Pel b50, 400, 700 | Obl Ax T1 Pre | Obl Ax T1 70sec | Obl Cor T1 Post | Ax T1 Post 1mm |
|---|---|---|---|---|---|---|---|---|---|---|
| FOV | 46 | 26 | 26 | 26 | 26 | 28 | 30 | 30 | 26 | 30 |
| Slice Thickness | 8 | 2.4 | 2.4 | 2.4 | 2.4 | 4 | 1 | 1 | 1.3 | 0.5 |
| Slice Spacing | 0 | 0.2 | 0.2 | 0.2 | 0.2 | 0.5 | ― | ― | ― | ― |
| Overlap Locations | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| No Phase Wrap | 1 | 1 | 1 | 1.5 | 1.5 | ― | 1 | 1 | 1.5 | 1 |
| Number of Slices | ― | 30 | ― | ― | ― | 20 | 1 | 1 | ― | 1 |
| Slices per Slab | ― | ― | ― | ― | ― | ― | 152 | 152 | 156 | 400 |
| Slice Resolution(%) | ― | ― | ― | ― | ― | ― | 50 | 50 | 50 | 50 |
| No Slab Wrap | ― | ― | ― | ― | ― | ― | ― | ― | 1.05 | 1.05 |
Acquisition Timing
| Scan Description | 3pl Loc | Sag T2 Fat | Obl Ax T2 Fat | Obl Cor T2 Fat | Obl Cor T2 | Ax DWI Pel b50, 400, 700 | Obl Ax T1 Pre | Obl Ax T1 70sec | Obl Cor T1 Post | Ax T1 Post 1mm |
|---|---|---|---|---|---|---|---|---|---|---|
| Acq Voxel Size | 1.4 X 2.9 X 8.0 | 0.7 X 1.0 X 2.4 | 0.7 X 1.0 X 2.4 | 0.7 X 1.0 X 2.4 | 0.7 X 1.0 X 2.4 | 2.9 X 2.9 X 4.0 | 1.2 X 1.3 X 2.0 | 1.2 X 1.3 X 2.0 | 1.1 X 1.2 X 2.6 | 1.0 X 1.0 X 1.0 |
| Freq | 320 | 384 | 384 | 384 | 384 | 96 | 256 | 256 | 232 | 300 |
| Phase | 160 | 256 | 256 | 256 | 256 | 96 | 224 | 224 | 224 | 300 |
| Freq DIR | Unswap | S/I | Unswap | Unswap | Unswap | R/L | Unswap | Unswap | Unswap | Unswap |
| # of Acq. Before Pause | 0 | 0 | ― | ― | ― | ― | ― | ― | ― | ― |
| Phase FOV | 1 | 0.9 | 0.9 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Auto Shim | Auto | Auto | Auto | Auto | Auto | Auto | Auto | Auto | Auto | Auto |
| Phase Correct | Off | Off | Off | Off | Off | On | Off | Off | Off | Off |
| RF Drive Mode | Quadrature (CP) | Optimized | Optimized | Optimized | Optimized | Quadrature | Preset | Preset | Preset | Preset |
| Excitation Mode | Selective | Selective | Selective | Selective | Selective | Selective | Selective | Selective | Selective | Selective |
| NEX | ― | 2 | 2 | 1 | 1 | ― | 1 | 1 | 1 | 1 |
| Flow Comp Direction | ― | Freq | Freq | Freq | Freq | ― | ― | ― | ― | ― |
| Fat Shift DIR | ― | Normal (S) | Normal | Normal | Normal | ― | ― | ― | ― | ― |
Scan Timing
| Scan Description | 3pl Loc | Sag T2 Fat | Obl Ax T2 Fat | Obl Cor T2 Fat | Obl Cor T2 | Ax DWI Pel b50, 400, 700 | Obl Ax T1 Pre | Obl Ax T1 70sec | Obl Cor T1 Post | Ax T1 Post 1mm |
|---|---|---|---|---|---|---|---|---|---|---|
| TE | 70 | 103 | 103 | 103 | 103 | Minimum | Min Full | Min Full | Minimum | Minimum |
| Number of Echoes | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 |
| TR | Minimum | 4050 | 4050 | 4050 | 4050 | ― | ― | ― | ― | ― |
| Receiver Bandwidth | 83.33 | 62.5 | 62.5 | 62.5 | 62.5 | ― | 142.86 | 142.86 | 166.67 | 142.86 |
| Flip Angle | ― | 111 | 111 | 111 | 111 | ― | 15 | 15 | 15 | 15 |
| Echo Train Length | ― | 23 | 23 | 23 | 23 | ― | ― | ― | ― | ― |
| Number of Shots | ― | ― | ― | ― | ― | 1 | ― | ― | ― | ― |
Contrast
| Scan Description | 3pl Loc | Sag T2 Fat | Obl Ax T2 Fat | Obl Cor T2 Fat | Obl Cor T2 | Ax DWI Pel b50, 400, 700 | Obl Ax T1 Pre | Obl Ax T1 70sec | Obl Cor T1 Post | Ax T1 Post 1mm |
|---|---|---|---|---|---|---|---|---|---|---|
| Contrast Yes/No | No | No | No | No | No | No | No | No | +C | No |
Others
| Scan Description | 3pl Loc | Sag T2 Fat | Obl Ax T2 Fat | Obl Cor T2 Fat | Obl Cor T2 | Ax DWI Pel b50, 400, 700 | Obl Ax T1 Pre | Obl Ax T1 70sec | Obl Cor T1 Post | Ax T1 Post 1mm |
|---|---|---|---|---|---|---|---|---|---|---|
| Anatomical Region | Rectum | Rectum | Rectum | Rectum | Rectum | Abdomen | Rectum | Rectum | Rectum | Rectum |
| 3D Geometry Correction | ― | ― | ― | ― | ― | Off | On | On | On | On |
Saturation
| Scan Description | 3pl Loc | Sag T2 Fat | Obl Ax T2 Fat | Obl Cor T2 Fat | Obl Cor T2 | Ax DWI Pel b50, 400, 700 | Obl Ax T1 Pre | Obl Ax T1 70sec | Obl Cor T1 Post | Ax T1 Post 1mm |
|---|---|---|---|---|---|---|---|---|---|---|
| SAT Location A | ― | Default | Default | Default | Default | ― | ― | ― | ― | ― |
| Fat/Water Saturation | ― | Fat | Fat | Fat | ― | Fat | ― | ― | ― | ― |
| SAT Location P | ― | ― | ― | ― | ― | P70.0 | ― | ― | ― | ― |
Tracker
| Scan Description | 3pl Loc | Sag T2 Fat | Obl Ax T2 Fat | Obl Cor T2 Fat | Obl Cor T2 | Ax DWI Pel b50, 400, 700 | Obl Ax T1 Pre | Obl Ax T1 70sec | Obl Cor T1 Post | Ax T1 Post 1mm |
|---|---|---|---|---|---|---|---|---|---|---|
| Tracker Length | ― | ― | 200 | 200 | 200 | ― | ― | ― | ― | ― |
| Tracker Thickness | ― | ― | 20 | 20 | 20 | ― | ― | ― | ― | ― |
Diffusion
| Scan Description | 3pl Loc | Sag T2 Fat | Obl Ax T2 Fat | Obl Cor T2 Fat | Obl Cor T2 | Ax DWI Pel b50, 400, 700 | Obl Ax T1 Pre | Obl Ax T1 70sec | Obl Cor T1 Post | Ax T1 Post 1mm |
|---|---|---|---|---|---|---|---|---|---|---|
| Multi b-values | ― | ― | ― | ― | ― | 50.0;400.0;700.0; | ― | ― | ― | ― |
| Optimized TE | ― | ― | ― | ― | ― | On | ― | ― | ― | ― |
| Multi NEX Values | ― | ― | ― | ― | ― | 2.0;4.0;6.0; | ― | ― | ― | ― |
| Diffusion Directions | ― | ― | ― | ― | ― | 3in1 | ― | ― | ― | ― |
| Number of Diffusion Directions | ― | ― | ― | ― | ― | 1 | ― | ― | ― | ― |
| Number of T2 Images | ― | ― | ― | ― | ― | 0 | ― | ― | ― | ― |
| Dual Spin Echo | ― | ― | ― | ― | ― | Off | ― | ― | ― | ― |
| # Synthetic b-values | ― | ― | ― | ― | ― | 0 | ― | ― | ― | ― |
| Recon All Images | ― | ― | ― | ― | ― | On | ― | ― | ― | ― |
| Real Time Field Adjustment | ― | ― | ― | ― | ― | On | ― | ― | ― | ― |
Gating / Trigger
| Scan Description | 3pl Loc | Sag T2 Fat | Obl Ax T2 Fat | Obl Cor T2 Fat | Obl Cor T2 | Ax DWI Pel b50, 400, 700 | Obl Ax T1 Pre | Obl Ax T1 70sec | Obl Cor T1 Post | Ax T1 Post 1mm |
|---|---|---|---|---|---|---|---|---|---|---|
| Resp. Trigger Point | ― | ― | ― | ― | ― | 30 | ― | ― | ― | ― |
| Resp. Trigger Window | ― | ― | ― | ― | ― | 30 | ― | ― | ― | ― |
| Resp. Inter-Seq Delay | ― | ― | ― | ― | ― | Minimum | ― | ― | ― | ― |
| Auto Trigger Type | ― | ― | ― | ― | ― | ― | Off | Off | ― | ― |
