A study on the mass attenuation coefficients of different tissues for human body using finite element method

The values and so the estimation of the total mass attenuation coefficient is an important parameter for the interaction of radiation with tissue and in dosimetry for the medical applications in radiology and in oncology. The full mass attenuation coefficient is identified by both photon energy in addition to constituent elements of the materials. Presently, the human phantoms and computer simulation is the main preferred methods to achieve this task. In this study a novel model design by Finite Element Method (FEM) interactive environment in order to simulate and calculate the mass attenuation coefficients of gamma ray for several human organs. These organs include tissue, adipose tissue, blood, brain, bone, muscle, lung, skin and eye lens. Commonly used Gamma ray with several energies has been tested and these energy ranges are;60KeV, 80KeV, 150KeV, 400KeV, 500KeV, 600KeV, 1000KeV, 1250KeV, 1500KeV, and 2000KeV. The results have been compared with theoretical methods XCOM program and simulation program-based Monte Carlo model which are GEANT4 and FLUKA program as well as NIST. The proposed model results are very close to XCOM results and are very close to NIST values. These results are more accurate than FLUKA and GEANT4 simulation packages. Therefore, this method can be considered as a new method with high accuracy in the calculation of the mass attenuation coefficients of human tissues that can be relied upon with reliability.