. 2013 Feb;86(1022):20120289. doi: 10.1259/bjr.20120289

Table 2.

Results of equivalent dose to the lens of the eye per endoscopic retrograde cholangiopancreatography (ERCP) procedure

Staff	Mean equivalent dose to left eye H_p(3) per ERCP (mSv)	Range of equivalent dose to left eye H_p(3) per ERCP (mSv)	Number of monitored staff (n₁) and the number of cases (n₂)	Annual^a equivalent dose to left eye, H_p(3) (mSv)
Hospital A
GE	0.01	0.01–0.03	n₁=7	1.3
GE	0.01	0.01–0.03	n₂=48	1.3
Nurse 1	<0.01^b	—	n₁=1	<1.3^b
Nurse 1	<0.01^b	—	n₂=48	<1.3^b
Nurse 2	<0.01^b	—	n₁=1	<1.3^b
Nurse 2	<0.01^b	—	n₂=48	<1.3^b
Hospital B
GE	0.09	0.09–0.10	n₁=2	11.7
GE	0.09	0.09–0.10	n₂=14	11.7
Nurse 1	0.02	—	n₁=1	2.6
Nurse 1	0.02	—	n₂=14	2.6
Nurse 2	0.03	—	n₁=1	3.9
Nurse 2	0.03	—	n₂=14	3.9

GE, gastroenterologist.

Annual doses based on a typical workload of 130 cases per year.

Results limited by sensitivity of the dosemeter (10 μSv).