Arguing against efficiency is like arguing against motherhood and apple pie. How could anyone be against efficiency in health services? And when you look at the amounts of money needed to run a health system, as politicians frequently do, of course you want to use that money efficiently. In just about every policy or statement on health systems efficiency will be mentioned as one of the princip...

the cancer of oral cavity is related to lesions of mucous membrane of tongue and gum that can be treated with radiation therapy. a lateral photon field can be used to treat this kind of tumor, which has a side‑effect on normal tissue in the opposite side of the oral cavity. in this study the dosimetric effect of the various shields in oral cavity is evaluated. in this study, a special phantom s...