نتایج جستجو برای: x rays
تعداد نتایج: 646783 فیلتر نتایج به سال:
Background and purpose: Âpoptosis or programmed cell death is a process of cell suicide. Ïonizing radiation is one of the stimuli for apoptosis, acting through DNÂ damage. Ïn the present study, effects of x-rays induced apoptosis in HL60 cells, as well as the protective effects of SÇF( Stem Çell Factor) in inhibiting x-ray induced apoptosis have been evaluated. Materials and methods : Ëxpo...
Background: Radiosensitization using nanoparticles is proposed as a novel strategy for treatment of different cancers. Superparamagnetic iron oxide nanoparticles (SPIONs) have been reported to enhance effects of radiotherapy in several researches. Objective: The objective of this research is to investigate the radiosensitization properties of polyglycerol coated SPIONs (PG-SPIONs) on U87-...
Objective: In this study, we aimed to validate the accuracy of computed tomography-based attenuation correction (CTAC) using the bilinear scaling method.Methods: The measured attenuation coefficient (μm) was compared to a theoretical attenuation coefficient (μt ) using four different CT scanners and an RMI 467 phantom. The effective energy of the CT beam X-rays was calculated, using the aluminu...
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