MR Liver Mass W/WO + Fe Quantification BODY Protocol
Scan Notes
Last updated: 1/31/2024
Charge as: Abdomen W/WO
Scanner preference: CHH or MR2 only
Coil: Torso Coil
- No cardiac images to be acquired. ONLY LIVER images, please.
- Liver quantification consists of 3 sets of data, each sampling a different part of liver (dome, mid liver, inferior liver)
- The Fe sequences were created using a cardiac sequence, so you may have to put cardiac gating (either PPU or ECG) on the patient in order for proper gating.
- Send ADC maps
- Send Subtractions
- FOV: do not include patient’s arms
Breath Holds:
- Scan on expiration.
- Monitor that patient is breath-holding. Breathe the patient slowly so they have time to follow instructions. Do not start scan until the patient has stopped breathing.
- Give 2L O2 if it will help with breath-holds UNLESS PATIENT HAS COPD OR ANOTHER REASON NOT TO GIVE O2.
| Plane | Weighting | Mode | Slice | Gap | FAT SAT | FOV | Notes |
|---|---|---|---|---|---|---|---|
| Cor | T2 | SSFSE | 7mm | 1mm | None | Liver through bottom of kidneys | Breath Hold. Ensure liver is well-centered in coil to ensure good signal at dome. |
| Axial Liver Quantification (Dome) | T2* | FFE | 10mm | 10mm | None | One slice positioned at dome of liver. See images below | Breath Hold |
| Axial Liver Quantification (Mid-Liver) | T2* | FFE | 10mm | 10mm | None | One slice positioned at mid-liver. See images below. | Breath Hold |
| Axial Liver Quantification (Inferior liver/abd) | T2* | FFE | 10mm | 10mm | None | One slice positioned at lower portion of liver. See images below. | Breath Hold |
| Axial | T1 | Dual Echo SPGR BH | 5mm | 0.5mm | None | Entire liver | May be separated into overlapping stacks if patient cannot breath-hold. Do not interleave images. Okay to use 6mm slice thickness with 1mm gap on MR1 and CHMR2. |
| Axial | T1 | 3D mDixon pre BH | - | - | Yes | Entire liver | Ensure quality before contrast injection |
| Power Inject Contrast | Bolus Track | Trigger when bolus reaches the SMA | |||||
| Axial | T1 | 3D mDixon x3 phases BH | - | - | Yes | Entire liver | Exact parameters as the pre-mDixon. |
| COR | T1 | 3D mDixon 3 min post | - | - | Yes | Cover diaphragm to aortic bifurcation, abdominal wall to abdominal wall | Perform @ 3 minutes post contrast |
| Axial | T1 | 3D mDixon BH | - | - | Yes | Entire liver | Timed exactly 4 mins post-injection. |
| Axial | T2 | TSE RT | 5mm | 0.5mm | SPAIR | Entire liver | Okay to use 6mm slice thickness with 1mm gap on MR1 and CHMR2. |
| Axial | T2 | DWI | 7mm | 1mm | Liver through bottom of kidneys | ||
| Axial | T2 | SSFSE RT | 5mm | 0.5mm | Yes | Entire liver | Optional sequence if T2 SPAIR is poor quality. Okay to use 6mm slice thickness with 1mm gap on MR1 and CHMR2. |
