other تکنیک های کم کردن دوز اشعه درمحیط کار بین رشته ای ( مدیریت آموزشی، تحقیقات آموزشی، آموزش پزشکی ) Interdisciplinary (Educational Management, Educational research, Statistics, Medical education پژوهشی Original <div style="text-align: justify;">The principal objective of radiation protec&shy;tion is to ensure that the dose received by any individual does not exceed the applicable&nbsp;M.P.D. values.We will discuss in this paper the presents recommendations and technical information related to the design and installation of struc&shy;tural shielding with taking into account the concept of Maximum Permissible Dose equi&shy;valent (MPDl as expressed and given in the Medical Journal of the National University of Iran, Vol. 3. No. 1, January 1975.&nbsp;<br> The numerical values of the MPD are such that the probability of adverse biological effects is extremely low in light of the present scien&shy;tific knowledge of Radiation Biological Effects&nbsp;(R.B.E.) in safety use. It includes a discus&shy;sion of the various factors to be considered in the selection of appropriate shielding mate&shy;rials and in the calculation of barrier thick&shy;ness. The paper is prepared after reviewing many literatures: i.e., all NBS, ICRP, ICRU, NCRP, published Journals and reports, all in&shy;ternational recommendations in this subject for ihe use of radiologists, radiological physicists, health physicists, inspectors and regulatory personnel, architects, hospital administrators in the light of planning and designing new faci&shy;lities, remodelling existing facilities, possible future needs for new equipments, higher radia&shy;tion source of machine and even increasing work load.&nbsp;</div> 114 126 http://pejouhesh.sbmu.ac.ir/browse.php?a_code=A-10-3973-153&slc_lang=other&sid=1 Mehdi Homayoon far مهدی همایونفر 100319475328460020754 100319475328460020754 Yes دانشیار گروه رادیولوژی و پزشکی هسته‌ای - دانشکده پزشکی دانشگاه ملی ایران. کارشناس و متخصص حفاظت و کنترل پرتوهای یون‌ساز.