7th Asia-Oceania Congress of Medical Physics and 13th CSMP Annual Meeting NCRP REPORT No.49 STRUCTURAL SHIELDING National Council on DESIGN AND Radiation Protection EVALUATION FOR and Measurements MEDICAL USE OF X RAYS AND GAMMA RAYS OF ENERGIES UP TO 10 Mev www.NCRPonline.org www.ncrp.com NCRP National Council on Radiation Protection and Measurements 7 th Asia-Oceania Congress of Medical Physics and 13th CSMP Annual Meeting National Council on Radiation Protection and Measurements www.NCRPonline.org www.ncrp.com