نتایج جستجو برای: Skin dose

تعداد نتایج: 493200  

Journal: :iranian journal of medical physics 0
nsikan u. esen - department of physics, akwa ibom state university, pmb 1167 uyo, nigeria

introduction radiation exposures from diagnostic medical examinations are generally low and are almost always justified by the benefits of accurate diagnosis of possible disease conditions. therefore, entrance skin dose (esd), body organ dose (bod), and effective dose (ed) from adult patients undergoing routine thorax posterior-anterior (pa) and thorax right lateral (rlat) were estimated in uni...

Journal: :iranian journal of medical physics 0
m. t. bahreyni toosi professor, medical physics research center, bu-ali research institute, mashhad university of medical sciences, mashhad, iran. h. saberi ph.d. student in medical physics, mashhad university of medical sciences, mashhad, iran m. momen nezhad ph.d. student in medical physics, mashhad university of medical sciences, mashhad, iran

introduction:  skin  sparing  is  one  of  the  most  desirable  characteristics  of  high  energy  photon  beams. however, the photons emerging from the target of linacs are contaminated by secondary  electrons  as  a  result  of  their  interactions  with  air,  collimators,  flattening  filter  and  any  other  objects in their path. this phenomenon tends to increase the skin dose received b...

Journal: :iranian journal of medical physics 0
mohammad taghi bahreyni toossi medical physics research center, medical physics department, mashhad university of medical sciences, mashhad, iran.

introduction the increasing practice of interventional fluoroscopy in diagnosis and treatment of cardiovascular disease has risen attention to improve radiation protection of patients and cardiologists in these relatively high dose techniques. therefore, nowadays there is an emphasis on the measurement of radiation dose received by patients and cardiologists arising from the relevant procedures...

Journal: :journal of biomedical physics and engineering 0
m oshaghi master student, department of biomedical engineering, science and research branch, islamic azad university, tehran, iran m sadeghi associate, agricultural, medical & industrial research school, nuclear science and technology research institute, karaj, tehran, iran sr mahdavi assistant professor of medical physics, department of medical physics, faculty of medicine, tehran university of medical sciences, tehran, iran ar shirazi

background: accelerated partial breast irradiation via interstitial balloon brachytherapy is a fast and effective treatment method for certain early stage breast cancers however skin, chest wall and lung doses are correlated with toxicity in patients treated with breast brachytherapy. objective: to investigate the percentage of the dose received by critical organ (skin), thermoluminescence dete...

Journal: :iranian journal of medical physics 0
ali asghar mowlavi associate professor, physics dept., school of sciences, sabzevar tarbiat moallem university, iran azam sadat afzali m.sc., in physics, school of sciences, sabzevar tarbiat moallem university, iran

introduction: skin dose and depth dose distribution of some beta sources that can contaminate skin or protective clothing covering the skin have been calculated using varskin2. materials and methods: in this research, absorbed dose to skin and depth dose from the skin surface have been calculated for 90sr/90y, 147pm, 32p beta emitter radioisotopes by using input parameters: activity of source, ...

Journal: :iranian journal of medical physics 0
esen nsikan u dept. of physic, university of ibadan, nigeria

introduction high doses of ionizing radiation can lead to adverse health outcomes such as cancer induction in humans. although the consequences are less evident at very low radiation doses, the associated risks are of societal importance. this study aimed at assessing entrance skin doses (esds) in patients undergoing selected diagnostic x-ray examinations at public hospitals of akwa ibom state,...

Journal: :iranian journal of radiation research 0
b.aghahadi department of physics, harbin institute of technology, harbin 150080. p.r. china z. zhang department of national radiation protection, atomic energy organization of iran, tehran, iran s. zareh department of medical physics, tehran university of medical sciences, tehran,iran s. sarkar department of medical physics, tehran university of medical sciences, tehran,iran p.s.tayebi department of physics, heilongjiang university, harbin 150080,p.r. china

abstract   background: the x-ray machines used for radiodiagnosis should meet certain quality assurance (qa) programmes . these are necessary to have good quality radiographs at reasonably low exposure to patients.   materials and methods: dose reduction methods in abdomen x-ray examination were carried out in 10 hospitals in tehran. this paper presents the work, which was implemented on 200 pa...

Journal: :journal of biomedical physics and engineering 0
hr baghani phd student of radiation medicine, radiation medicine department, shahid beheshti university, tehran, iran ar nazempour msc student of radiation medicine, radiation medicine department, shahid beheshti university, tehran, iran smr aghamiri professor of radiation medicine, radiation medicine department, shahid beheshti university, tehran, iran sm hosseini daghigh phd student of radiation medicine, radiation medicine department, shahid beheshti university, tehran, iran aa mowlavi professor of nuclear physics, physics department, school of science, hakim sabzevari university, sabzevar, iran

background and objective: the most common intravascular brachytherapy sources include 32p, 188re, 106rh and 90sr/90y. in this research, skin absorbed dose for different covering materials in dealing with these sources were evaluated and the best covering material for skin protection and reduction of absorbed dose by radiation staff was recognized and recommended. method: four materials includin...

Journal: :iranian journal of medical physics 0
seyed mostafa ghavami department of radiology, paramedical school, tabriz university of medical sciences, tabriz, iran hosein ghiasi medical radiation sciences research team, tabriz university of medical sciences tabriz, iran

introduction accurate estimation of the skin-absorbed dose in external radiation therapy is essential to estimating the probability of secondary carcinogenesis induction materials and methods electron contamination in prostate radiotherapy was investigated using the monte carlo (mc) code calculation. in addition, field size dependence of the skin dose was assessed. excess cancer risk induced by...

Ali Asghar Mowlavi, Azam Sadat Afzali

Introduction: Skin dose and depth dose distribution of some beta sources that can contaminate skin or protective clothing covering the skin have been calculated using VARSKIN2. Materials and Methods: In this research, absorbed dose to skin and depth dose from the skin surface have been calculated for 90Sr/90Y, 147Pm, 32P beta emitter radioisotopes by using input parameters: activity of source, ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید