Radiation – Exposure Convert From coulomb/kilogram[C/kg]millicoulomb/kilogram[mC/kg]microcoulomb/kilogramroentgen[R]tissue roentgenparkerrep coulomb/kilogram[C/kg] millicoulomb/kilogram[mC/kg] microcoulomb/kilogram roentgen[R] tissue roentgen parker rep people found this article helpful. What about you?