MR Urogram W/WO Protocol

Scan Notes
 
Last updated: 11/24/2025
Charge as: Abdomen W/WO
Scanner: DMR2 and MR4
Coil: Torso Coil 
Scan time: approximately 45 minutes
 
  • This is the peds protocol. For adult patients, follow adult protocol.
  • IV hydration with a saline bolus.
  • ALL patients should void prior to getting on the table.
  • Cover through the perineum. On axials, cover from the top of kidneys to the bottom of the bladder. Use single stack for smaller patients and dual stack protocol if more coverage is needed. Only the upper stack is repiratory gated on the dual stack protocol. Any alterations in geometry must be done to both stacks.
  • Generating dual stack MPR's: MRP desired plane from one of the stacks. The geolink will automatically make it for both upper and lower. Mobi view MPRs together. Send only the Mobi viewed MPRs.
  • Load Power injector with weight-based gad and saline.
  • Call rad to check images before giving contrast for sedated patients. 
ORDERS: Ordering M.D. must put in orders in EPIC for IV Lasix and IV saline.
IV HYDRATION (two options):
  • Option 1. IV hydration with a saline bolus is ok without the Foley. If the patient does have a Foley, please clamp the Foley.
  • Option 2. IV hydration for one hour before study with normal saline 4 cc/kg/hr for first 10 kg of body weight, 2 cc/kg/hr for next 10 kg of weight, and 1 cc/kg/hr for each additional kg of weight.
  • ALL patients should void prior to getting on the table. 
IV LASIX:
  • RN to inject Lasix.
  • Dosage = 0.5 mg/kg, max 20 mg. IV Lasix is given approximately 15 minutes before MR contrast.
  • Outpatients: Lasix is kept in MRI.
  • Inpatients: Lasix is ordered from the pharmacy.
CONTRAST INJECTION:
  • Call rad to check images before giving contrast. Ask if they want to see the images before the patient gets off the table.
  • Check the Dynamic tab on scanner: “Continuous scanning” for the first 5 minutes, and then 1 dynamic every 10 seconds.

  • Inject contrast @ 0.1ml/sec with power injector.
  • Start scan and inject gad at the same time.
  • This sequence is 20 minutes long. Once the scanner has completed running the first 5 minutes of continuous scanning it will pause and then will automatically start again for the timed delays. Don’t worry that the scanner has stopped as it’s just a timed sequence with long pauses built in. Do not stop the scan.
MR Urogram W/WO Protocol
Plane Weighting Mode Slice Gap FAT SAT FOV Notes
RN injects Lasix
COR T2 SS 5 1 No Fit to patient Triggered
Axial T1 3D Vane 2 0 mDixon 210-300mm IP/OP/Water send individual axial weightings and single COR water MPR
Axial T2 MVXD 5 1 SPIR
COR T2 THICK SLAB MRCP WITH MIP SS 75 SPAIR Angle as shown below to include the kidneys and bladder.
RAD TO CHECK IMAGES
Contrast Injection
Power inject contrast @ 0.1ml/sec. Start scan and inject gad at the same time.
Cor Obl Dynamic FFE Dynamic (See above notes about injection) Through kidneys and ureters. Include bladder. Don't change the FOV of this sequence unless the patient truly doesn't fit. If you have to change the FOV, you must check the dynamic timing to ensure it hasn't altered. If it's changed, you will need to manually adjust all of the dynamics.
Axial T1 3D Vane 2 0 mDixon Same as pre Water only. SAG and COR MPR