How can you determine Equivalent Does?

salam3alaikom

i think he was asking about how to mesure the equivalent doses not how to prevent radiation so I could say with special tool called radiometer from1 meter from the source :that's the radiation flux  

DearMohammedI will speakwith youinterms ofradiation protectionwithin thehealth centers and hospitalsFirst,not allthe radiationthat we use inthe most dangerousanddetrimentalequal togammaand betaradiationandX-rays-Roomsare isolatedfrom thesource ofradiationoutsideplates of leadbecause itpreventsthe permeability ofradiation-Are isolatedplacethe operatorof the devicewith glass panelsunleadedpreventradiationdoes not preventthe patient'svision