Colonic diverticulosis is best diagnosed by: (A) Colonoscopy, (B) Nuclear scan, (C) Barium enema, (D) CT scan
Answer is C. "Diverticula are best seen on barium enema. Colonoscopy is a less sensitive means of detecting diverticula." - CMDT 2007

Diverticulosis refers to the presence of multiple diverticula
Diverticulitis refers to inflammation and infection associated with a diverticulum.

Best investigation for
Diverticulosis - Barium enema
Diverticulitis - CT scan

On barium, enema diverticulosis shows characteristic 'sawtooth' appearance