Optical imaging technology in colonoscopy: Is there a role for photometric stereo?

Table 1 Factors considered to impact on adenoma detection rate

Service factors	Patient factors	Endoscopist factors	Technical factors	Mechanical technologies
Allocated time per procedure[56]	Patient characteristics (age, medical history)[60]	Training[63]	Withdrawal time[65]	End-of-scope devices (cuffs, caps, rings)[72]
Morning vs afternoon list[57]	Indication for procedure[61]	Total experience[64]	Position change during withdrawal[66]	Third eye retroscope[73]
Enhanced patient instructions for bowel preparation[58]	Quality of bowel preparation[62]	Number of colonoscopies per year[64]	Re-examination of right colon[67]
Setting (hospital based vs non-hospital based)[59]		Caecal intubation rate[59]	Retroflexion in right colon[67]
		Specialty[59]	Rectal retroflexion[68]
		Daily case load and fatigue[60]	Water-aided colonoscopy[69]
			Antispasmodics[70]
			Second observer[71]