MR Rectum/Rectal CA W/WO Protocol

Scan Notes

Last updated: 9/20/2021
Charge as: Pelvis W/WO
Scanner preference: 1.5T or 3T
Coil: Torso Coil

  • Send ADC maps and void before exam.
  • On patients that have had a previous Rectal CA MRI, use the same locations as the last exam.  This will eliminate the need to call for the Body Radiologist to place lines for the angulations and coverage of the sequences.
MR Adult Rectum/Rectal CA WWO Protocol Image
Plane Weighting Mode Slice Gap FAT SAT FOV Notes
AX T1 GRE 4mm 1mm No 250mm/ Fit to Patient Consider anterior sat band if lots of abdominal wall motion.
SAG T2 FSE 4mm 1mm No Fovea to Fovea Freq A-P. Add anterior sat band to reduce abdominal wall motion. Used to plan oblique planes.
COR T2 FSE 4mm 1mm No Fovea to Fovea. Symphysis pubis through sacrum.
AX T2 FSE 4mm 1mm No 200mm/ Fit to Patient Consider anterior Sat Band to reduce artifact from anterior abdominal wall. Cover aortic bifurcation through perineum.
AX Oblique T2 FSE 3mm 0mm No Fovea to Fovea Inplane voxel size (acquired voxel size) is 0.6 x 0.6 mm. Add anterior sat band to reduce abdominal wall motion. Performed perpendicular to the tumor. Use same angles and coverage if patient has a prior Rectal MRI exam at OHSU. Otherwise, call MR radiologist for planning.
COR Oblique T2 FSE 3mm 0mm No Fovea to Fovea Inplane voxel size (acquired voxel size) is 0.6 x 0.6 mm. Performed parallel to the anal canal. May plan without radiologist.
3D T2 AXIAL T2 3D T2 No Fovea to Fovea L5-S1 through perineum.
AX Oblique T1 3D THRIVE BH pre Yes Fovea to fovea Add anterior sat band to reduce abdominal wall motion. Same plane as the AX Oblique T2
Hand Inject Contrast
AX Oblique T1 HI-RES THRIVE post 4mm 0mm Yes Fovea to fovea Same as pre
SAG T1 3D thrive post Yes Fovea to fovea
AX Oblique T2 DWI 4mm 0mm SPIR Match AX OBLIQUE TSE T2 Add anterior sat band to reduce abdominal wall motion. Same plane as the Ax Oblique T2. Trigger & track. Free-breathing sequence, so please position slices accordingly. B=0, 1000. NEX 6