Computational models of the human body have gradually become crucial in the evaluation of doses absorbed by organs. However, individuals may differ considerably in terms of organ size and shape. In this study, the authors sought to determine the energy-dependent standard deviations due to lung size of the dose absorbed by the lung during external photon and neutron beam exposures. One hundred l...

Abstract Dose equivalent limits for single organs are recommended by the ICRP (International Commission Radiological Protection publication 103). These do not lend themselves to be measured. They assessed convoluting conversion factors with particle fluences. The Fluence-to-Dose tabulated in literature. allow assessing organ dose of interest using numerical simulations. In particular, literatur...

Recently, specific computed tomography (CT) scanners have been equipped with organ-based tube current modulation (TCM) technology. It is possible that organ-based TCM will replace the conventional dose-reduction technique of reducing the effective milliampere-second. The aim of this study was to determine if organ-based TCM could reduce radiation exposure to the breasts without compromising the...

background the present data show a global increase in the rate of cardiovascular disease. cardiac ct angiography has developed as a fast and non-invasive cardiac imaging modality following the introduction of multi-slice computed tomogaraphy. conclusions the total mean radiation dose to the thyroid and gonads was 0.36 msv, and 96.5 μsv, respectively for the subjects. these values were high for ...

BACKGROUND Computed Tomography (CT) contributes up to 50% of the medical exposure to the United States population. Children are considered to be at higher risk of developing radiation-induced tumors due to the young age of exposure and increased tissue radiosensitivity. Organ dose estimation is essential for pediatric and adult patient cancer risk assessment. The objective of this study is to v...

Background In radiotherapy, especially when treating children, minimising exposure of healthy tissue can prevent the development adverse outcomes, including second cancers. this study we propose a validated Monte Carlo framework to evaluate complete patient during paediatric brain cancer treatment. Materials and methods Organ doses were calculated for treatment diffuse midline glioma (50.4 Gy w...

PURPOSE To quantify the potential advantages of prone position breast radiotherapy in terms of the radiation exposure to out-of-field organs, particularly, the breast or the lung. Several dosimetric studies have been reported, based on commercial treatment planning software (TPS). These TPS approaches are not, however, adequate for characterizing out-of-field doses. In this work, relevant out-o...