A mamografia é o exame padrão ouro para rastreamento do câncer de mama, sendo recomendada pelo Ministério da Saúde Brasil a cada 2 anos mulheres 50 69 anos. Por ter uma grande demanda nos serviços diagnóstico por imagem e pela sua importância clínica, controle qualidade processo otimização são ferramentas indispensáveis garantia mamografia. O mamógrafo avaliado neste trabalho limitado, no modo ...

Abstract Background: DECT is a new evolving technique used for in vivo prediction of renal stones chemical characterizations. Aim Study: This study aims to assess the role Dual Energy computed Tomography (DECT) evaluation stone compositions. Patients and Methods: prospective cohort study, it included 30 patients. Classic single energy examina-tions were done (100-120 kVp) followed by performed ...

This article shows the development of an instrument for measuring exposure parameters used to take radiographic studies in living beings; such as kilovoltage, current and time, since radiation protection is a fundamental pillar care patients operators ionizing equipment, it necessary calibrate these equipment that produce X-rays. For manufacture ESP32 microcontroller which programmed using Pyth...

The aim of this study is to assess the radiation exposure patient and medical staff during interventional cardiology procedures. Realistic scenarios were developed using adult reference anthropomorphic phantoms adopted by International Commission on Radiological Protection ( ICRP 110 Male Female ), transport code Geant4 (version 10.3 ). calculated equivalent effective doses normalised simulated...

This work has been conducted to demonstrate a procedure for using a Konica Minolta computed radiography (CR) system for the measurement of computed tomography (CT) radiation profile width, and to compare this method with conventional and GAFCHROMIC XR-QA2 film measurements. The exposure and processing conditions of a Konica Minolta CR reader system were characterized to establish the relationsh...

We aimed to compare the diagnostic performance and inter-observer consistency between low dose chest CT (LDCT) and standard dose chest CT (SDCT) in the patients with blunt chest trauma.A total of 69 patients who met criteria indicative of blunt chest trauma (77% of male; age range, 16-85) were enrolled. All patients underwent LDCT without intravenous (IV) contrast and SDCT with IV contrast usin...

We derive a class of extended one-step methods of order m for solving delay-differential equations. This class includes methods of fourth and fifth order of accuracy. Also, the class of these methods depends on two free parameters. A convergence theorem and convergence factor of these methods are given. In addition, we investigate the stability properties of these methods. The results of the ar...

This paper describes the development of a Graphics Processing Unit (GPU) accelerated Monte Carlo photon transport code, ARCHERGPU, to perform CT imaging dose calculations with good accuracy and performance. The code simulates interactions of photons with heterogeneous materials. It contains a detailed CT scanner model and a family of patient phantoms. Several techniques are used to optimize the...