The aim of this study is to investigate the gamma ray radiation absorption properties bismuth oxide (Bi2O3), and determine effect lead (PbO) additive in shielding Bi2O3. For reason, parameters such as mass attenuation coefficient (MAC), linear (LAC), half value layer (HVL), tenth (TVL) mean free path (mfp) were calculated theoretically for Bi2O3, PbO, 50% Bi2O3-50%PbO. all results obtained by u...

Penta-glasses with a 59B2O3–29SiO2–2LiF–( $$10-x$$ ) ZnO– $$x$$ TiO2 composition the melt-quench techniques were prepared. X-ray diffraction was used to examine nature of fabricated glasses. The changes in structure glasses studied by Fourier-transform infrared spectroscopy spectra. molar volume reduces as density increases. mechanical characteristics these evaluated. Besides, for glasses, Phy-...

Introduction: Clinical radiation nephropathy can result in considerable morbidity and/or mortality. Renal tolerance (TD5/5) has been stated to be 20 Gy when irradiation has been delivered to both kidneys in 3-5 weeks. Therefore to minimize renal toxicity in these patients, localization and shielding of the kidneys are essential. This study was carried out to evaluate the role of Tc-DTPA renal s...

Introduction Superficial X-ray therapy is one of the most important treatment methods in radiotherapy especially in the treatment of superficial skin lesions (Up to 300 kVp). Quality of the X-ray beam that can be expressed by Half-Value Layer (HVL), are important indices for this type of treatment effective energy of photon and Homogeneity Coefficient (HC). Materials and Methods The HC of the s...

Acceptance testing and commission are essential elements of the quality assurance program for imaging equipment. We present results a performance evaluation Flat Panel-Based Cardiovascular Fluoroscopy X-ray Systems as part acceptance commissioning. Measurements were obtained using calibrated dose rate meter, patient equivalent phantoms, Leeds image test tools. The compared with manufacturer Eur...

The impact of medical imaging in health services is increasing day by day. In this way, diseases can be diagnosed earlier and treatments carried out more effectively. As the use goes beyond diagnosis reaches areas disease prevention treatment, costs healthcare on a global scale are also significantly reduced. study, radiation shielding properties drugs such as C23H30GdN3O11 (Gadoxetic acid), C2...

Abstract In the present work, selected dense rare-earth (RE) based scintillators such as gadolinium tantalate (GdTaO 4 ), tantalo-niobates Gd(Ta0.8Nb0.2)O , lutetium LuF 3 :Ce, LuAP:Ce, Lu 2 O3:Yb and Yb O have been investigated for their gamma-ray sensing efficacy. The properties of these RE confronted with modern lead tungstate (PWO) fluoride (PbF2) being employed recently in high energy phys...

Introduction: the objectives of this research were determination of Mean Glandular Dose in film- screen and digital mammography examinations, estimation of accumulated effective dose in some of mammography centers in Tehran city and estimating cancer risk due to these examinations. Materials and Methods: the clinical data were collected from the 1318 <...

This paper presents a new approach to control variables in chilled water loops for energy conservation. Based on the analysis of the relationships between differential pressure and chilled water flow rate in chilled water loop, a series of optimal set points can be found to reset the controlled variables. With these reset set points, chilled water pumps only provide the necessary energy for wat...

An epidemiological study to examine the sero-prevalence of zoonotic visceral leishmaniosis (ZVL) among domestic and wild canines in endemic foci of Iran was carried out during 1999-2003 to assess the distribution of the disease and the possible association between infection in dogs, wild canines and people. Anti-leishmanial antibodies were detected by the direct agglutination test (DAT). Parasi...