Eliakim and Adler look at applications for colon capsule endoscopy and find it effective compared to colonoscopy as well as CT colonography
Eliakim, Rami, and Samuel N. Adler. “Colon PillCam: Why Not Just Take a Pill?” Digestive Diseases and Sciences 60, no. 3 (January 14, 2015): 660–63. doi:10.1007/s10620-015-3534-y.