An improved method for determining absorbed dose from internal gamma-photon emitters has been developed. This method rigorously considers the contribution to the absorbed dose from both direct and scattered radiation and gives results in terms of absorbed fractions, specific absorbed fractions and dose build-up factors. Appropriate equations that utilize these different quantities are given for absorbed dose calculations.Absorbed fractions for both point sources and uniformly distributed sources in different target shapes and sizes for various source energies are given in graphical form to enable accurate interpolation. Specific absorbed fractions and dose build-up factors for central point isotropic source are given for various energies and distances from the source, in both finite and infinite tissue equivalent media. The effect of a boundary on the values of specific absorbed fractions and build-up factors is discussed. Variation of these quantities with energy and size of the target is presented graphically.