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

First examiner Hand Thyroid Eye lens Chest No. of Film Exposure time (min) X-ray tube location Present study 27.0 5.0 3.0 6.0 2.5 2.4 Overcouch Buls et al [14] 0.64 0.45 0.55 nd 4 6.0 Overcouch Naidu et al. [9]* NR 0.2 0.04 NR 4.6 5.9 Overcouch Sulieman et al. [3] 27.2 5.4 3.8 6.2 2.6 2.9 Overcouch Oztas et al. [10] 20.0 2.0 82.0 NR 1.7 5.7 undercouch

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