This study investigates the mass stopping power of electrons in various human tissues, including skin, bone, blood, adipose tissue, soft tissue, eye lens, lungs, breast glands, cartilage, and lymph nodes. Collisional stopping power was calculated using a modified Bethe-Bloch formula, while the radiative component was obtained analytically. Calculations were performed for electron energies ranging from 0. 01 MeV to 100 MeV. Maximum stopping power values were observed at 0. 01 MeV, ranging from 19. 986 \, MeV cm^2 g^{-1} in bone to 23. 546 \, MeV cm^2 g^{-1} in adipose tissue, while the lowest values occurred at 1 MeV. Results were compared with ESTAR and ICRU databases, showing overall agreement. In the radiotherapy-relevant range, differences in total stopping power reached up to 13. 45 % for blood at 20 MeV. These results confirm the reliability of the applied model and provide useful data for applications in medical physics and dosimetry.
Bito et al. (Wed,) studied this question.