Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 25 1-4 1983 12 15 83 92 GH. RAHBARI 2015 09 28 The most conveni ent me thod f or d e t ermining bone dose duri ng ext ra-oral . radi ogr aphy is ph o togr aph~c r adiation desimetry.This met hod was used bec ause, it is cheap,srnall l i ghtweight a nd adequately sens itive a nd i t a l s o prov i des a p e rmanent r ecor ds ( l O}. I t i s evident f r om thi s r eport tha t a r e l a tionsh i p e xist s between the bone and s k i n dose , age and s ex . In conclusion r e duction o f abs orbed dose can be ac complished by changing the cha racter s o f the x- r a y beam, i t s char a c t e rs can be changed by redtlct i on of t he beam di amet er and i ncr easing t ot a l f i l t rat ion t o 2 . 5 mm . o f Al .(9} https://acta.tums.ac.ir/index.php/acta/article/view/173 https://acta.tums.ac.ir/index.php/acta/article/download/173/169