Table 7: The mean radiation doses for the first examiner during ERCP procedure ( Gy).

First examinerHandThyroid Eye lensChestNo. of FilmExposure time (min)X-ray tube location

Present study27.05.03.06.02.52.4Overcouch
Buls et al [14]0.640.450.55nd46.0Overcouch
Naidu et al. [9]*NR0.20.04NR4.65.9Overcouch
Sulieman et al. [3] 27.25.43.86.22.62.9Overcouch
Oztas et al. [10]20.02.082.0NR1.75.7undercouch

Extrapolated from annual effective dose (mSv) for 400 procedures per year.
NR: not reported.