Staging of Colorectal Cancer

Procedure Appropriateness Category Relative Radiation Level US pelvis transrectal Usually Appropriate O MRI pelvis without and with IV contrast Usually Appropriate O MRI pelvis without IV contrast Usually Appropriate O CT abdomen and pelvis with IV contrast May Be Appropriate ☢☢☢ CT colonography May Be Appropriate ☢☢☢ FDG-PET/CT skull base to mid-thigh May Be Appropriate ☢☢☢☢ CT abdomen and pelvis without IV contrast Usually Not Appropriate ☢☢☢ CT abdomen and pelvis without and with IV contrast Usually Not Appropriate ☢☢☢☢