نتایج جستجو برای: computational phantoms

تعداد نتایج: 274208  

Journal: :journal of biomedical physics and engineering 0
e. hoseinian azghadi phd student of nuclear physics, physics department, school of sciences, ferdowsi university of mashhad, mashhad, iran l. rafat motavalli assistant professor of nuclear physics, physics department, school of sciences, ferdowsi university of mashhad, mashhad, iran h. miri hakimabad associate professor of nuclear physics, physics department, school of sciences, ferdowsi university of mashhad, mashhad, iran

annually, many people are irradiated for diagnostic and therapeutic purposes. assessment of radiation dose and its related risks to patients are important issues in radiation protection dosimetry. the complex mathematical calculations of the absorbed and effective doses are now done with computers. the calculations are performed with the help of anthropomorphic computational models of human bod...

E. Hoseinian Azghadi, H. Miri Hakimabad L. Rafat Motavalli

Annually, many people are irradiated for diagnostic and therapeutic purposes. Assessment of radiation dose and its related risks to patients are important issues in radiation protection dosimetry. The complex mathematical calculations of the absorbed and effective doses are now done with computers. The calculations are performed with the help of anthropomorphic computational models of human bod...

Introduction: Existing phantoms have been constructed based on Caucasian, non-Caucasian and race-specific datasets. According to previous studies made efforts to present Korean- specific phantoms and Chinese female phantom based on CVH dataset due to compare the resulting internal dosimetry with the Caucasian based data showed possible racial difference in human anatomy between ...

Journal: :Radiation and Environmental Biophysics 2009

Journal: :Radiation research 2017
David Welch Leah Turner Michael Speiser Gerhard Randers-Pehrson David J Brenner

Anatomically accurate phantoms are useful tools for radiation dosimetry studies. In this work, we demonstrate the construction of a new generation of life-like mouse phantoms in which the methods have been generalized to be applicable to the fabrication of any small animal. The mouse phantoms, with built-in density inhomogeneity, exhibit different scattering behavior dependent on where the radi...

Journal: :Brazilian Journal of Radiation Sciences 2023

To evaluate the amount of energy deposited in radiosensitive organs and tissues human body, when an anthropomorphic phantom is irradiated, researchers numerical dosimetry use so-called exposure computational models (ECMs). One can imagine ECM as a virtual scene composed mathematically defined position relation to radioactive source. The source these ECMs produces initial state simulation: posit...

2006
CHOONSIK LEE JAI-KI LEE

Phantoms for radiation dosimetry, including physical phantoms for radiological use in medicine in particular, were introduced as early as the 1910s [1] while those for radiation protection dosimetry started to evolve in the late 1950s. This innovation was driven partly from the consensus that dose quantity for protection purposes should be assessed in “receptor conditions” instead of the tradit...

Journal: :iranian journal of radiation research 0
f. babapour mofrad faculty of engineering, science and research branch, islamic azad university, tehran, iran r. aghaeizadeh zoroofi control and intelligent processing center of excellence, school of electrical and computer engineering, college of engineering, university of tehran, tehran, iran a. abbaspour tehrani fard electrical and electronic engineering school, sharif university of technology, tehran, iran sh. akhlaghpoor department of interventional radiology, sina hospital, tehran university of medical sciences, tehran, iran y.w. chen college of information and science, ristumeikan university, shiga, japan y. sato division of image analysis, graduate school of medicine, osaka university, osaka, japan

background: in nuclear medicine application often it is required to use computational methods for evaluation of organ absorbed dose. monte carlo simulation and phantoms have been used in many works before. the shape, size and volume in organs are varied, and this variation will produce error in dose calculation if no correction is applied. materials and methods: a computational framework for co...

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