To address the limited availability of radiation shielding data for brachytherapy as well as some disparity in existing data, Monte Carlo simulation was used to generate radiation transmission data for 60Co, 137CS, 198Au, 192Ir 169Yb, 170Tm, 131Cs, 125I, and 103pd photons through concrete, stainless steel, lead, as well as lead glass and baryte concrete. Results accounting for the oblique incid...

INTRODUCTION Several municipalities of the Western region of the State of São Paulo have been affected by human visceral leishmaniasis (HVL), including the City of Adamantina, where the first autochthonous cases occurred in 2004. Therefore, this study aimed to describe the spatial and spatiotemporal occurrence of HVL in Adamantina. METHODS Secondary data regarding the occurrence of HVL in Ada...

The problem of collecting reflection data from the layers below a high velocity layer (HVL) and imaging those accurately is solved using walkaway vertical seismic profiling (WVSP) technique. procedure shown on dataset model highly faulted, thin-bedded coal separated by limestone. By locating receivers above, in, HVL, reflections are expected to be recorded locally in situ borehole HVL before th...

background: making use of the orthovoltage machines in radiotherapy, is one of the routine methods for the treatment of the superficial lesions. in this study, an important determinant of x-ray quality, the hvl (half value layer), has been evaluated. materials and methods: the hvls of a orthovoltage x-ray machine in 120 and 180 kvp are measured, using an empirical method, in which the hvls are ...

Head computed tomography (CT) plays an important role in the comprehensive evaluation of acute stroke. Photon-counting spectral detectors, as promising candidates for use in the next generation of x-ray CT systems, allow for assigning more weight to low-energy x-rays that generally contain more contrast information. Most importantly, the spectral information can be utilized to decompose the ori...

BACKGROUND Rapid virological response (RVR) strongly predicts sustained virological response (SVR) in patients with chronic hepatitis C (CHC), and abbreviates antiviral therapy in some patients. OBJECTIVES To identify factors predicting virological relapse (VR) in CHC patients who attained RVR. PATIENTS AND METHODS Medical records of 133 CHC patients with an RVR after completing 24 weeks of...

The current study aims to investigate the radiation shielding properties of mortar samples with Fe2O3 nanoparticles for protection applications. For reference (free nanoparticles) and different concentrations nanoparticles, we experimentally measured transmission factor (I/I0) four thicknesses prepared mortar. I/I0 results indicated that photons through mortars decreases increases in mortar’s t...

BACKGROUND & AIMS Quantitative HBsAg has been recognized to assist in the management of chronic hepatitis B virus (HBV) infection. However, its role in disease monitoring of HBeAg-negative patients remains unclear. We aimed to investigate the longitudinal HBsAg change in HBeAg-negative carriers with HBV genotype B or C infection. METHODS This is a retrospective cohort study conducted in a uni...