introduction in computed tomography (ct) technology, an optimal radiation dose can be achieved via changing radiation parameters such as ma, pitch factor, rotation time and tube voltage (kvp) for diagnostic images. materials and methods in this study, the brain, abdomen, and thorax scaning was performed using toshiba 16-slice scannerand standard aapm and ctdi phantoms. aapm phantom was used for...

large quantities of radiopharmaceuticals prescribed for treatment and diagnosis are excreted through kidney. therefore, radiation unwanted dose is created in kidney. as a result, exact calculation of prescribed radiopharmaceuticals amount is important. monte carlo method is used for simulation of radiation transport in body due to random nature of radiation. in this research, for the first time...

large quantities of radiopharmaceuticals prescribed for treatment and diagnosis are excreted through kidney. therefore, radiation unwanted dose is created in kidney. as a result, exact calculation of prescribed radiopharmaceuticals amount is important. monte carlo method is used for simulation of radiation transport in body due to random nature of radiation. in this research, for the first time...

Computational phantoms are commonly used in internal radiation dosimetry to assess the amount and distribution pattern of energy deposited in various parts of the human body from different internal radiation sources. Radiation dose assessments are commonly performed on predetermined reference computational phantoms while the argument for individualized patient-specific radiation dosimetry exist...

In the frequency range from 16 to 50 THz, transmission, reflection, and absorption spectra of arrays heterogeneous Ni/Co, FeNi/Co, Ni/Fe nanowires grown in track polymer membranes by galvanic method have been studied. The showed that fraction radiation power absorbed its spectrum depend on materials nanowires. features can be explained accumulation nonequilibrium spin due electron diffusion rel...

The transport of vitamin D3 from the intestine via the intestinal lymph to the plasma compartment in rats has been studied. Rats were cannulated in the intestinal lymph duct and given an intraduodenal bolus of [la,2a3H] vitamin D3 in soybean oil. The appearance of radioactivity was negligible during the initial 2 h and peaked 4-8 h after feeding. About 90% of the recovered radioactivity was ass...