MR Rectum/Rectal CA W/WO Protocol

Scan Notes:

1. Send ADC maps and void before exam.
2. 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.

Last updated: 12/2/19
Charge as: Pelvis W/WO
Scanner preference: 1.5T or 3T
Coil: Torso Coil

Plane Weighting Mode Slice Gap FAT SAT FOV Notes
AX T1 GRE 4mm 1mm N 250mm/ Fit to Patient Consider anterior sat band if lots of abdominal wall motion.
SAG T2 FSE 4mm 1mm N 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 N Fovea to Fovea. Symphysis pubis through sacrum.
AX T2 FSE 4mm 1mm N 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 N Fovea to Fovea 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 N Fovea to Fovea Performed parallel to the anal canal. May plan without radiologist.
3D T2 AXIAL T2 3D T2 N Fovea to Fovea L5-S1 through perineum.
AX Oblique T1 3D THRIVE Pre- BH Y Fovea to fovea Add anterior sat band to reduce abdominal wall motion. Same plane as the AX Oblique T2

Contrast injection

Power inject 2mL/sec. Gad dosed by weight. Trigger when contrast reaches iliacs.

Plane Weighting Mode Slice Gap FAT SAT FOV Notes
AX Oblique T1 3D THRIVE 3-phase Dynamics Y Fovea to fovea Add anterior sat band to reduce abdominal wall motion. Same plane as the AX Oblique T2
AX Oblique T1 HI-RES THRIVE post- con 4mm 0mm Y Fovea to fovea Add anterior sat band to reduce abdominal wall motion. Same plane as the AX Oblique T2
SAG T1 3D thrive post- con Y 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
ADC MAP FROM DWI Please do ADC maps on all MRI Rectal pts scans and send them to pacs
MR Adult Rectum/Rectal CA WWO Protocol Image