PURPOSE The purpose of this paper is to characterize EBT3 using two types of scanner, analyzing the factors of influence of each dosimetry system. METHODS The film used in this study was GAFCHROMIC EBT3, the films were exposed at a dose range between 0Gy a 9Gy in a solid water phantom, SSD=100cm, 5cm depth and perpendicularly to the 6MV photon beam generated by a Novalis TX linear accelerator...

We discuss the experimental issues confronting measurements of the Virtual Compton Scattering (VCS) reaction ep → epγ with electron beam energies 6–30 GeV. We specifically address the kinematics of Deeply Virtual Compton Scattering (Deep Inelastic Scattering, with coincident detection of the exclusive real photon nearly parallel to the virtual photon direction) and large transverse momentum VCS...

The feasibility of detecting the photon-photon interaction using Fabry-Perot type laser interferometers developed for gravity wave detection is demonstrated. An “external” laser beam, serving as a refractive medium, is alternatively fed into the cavities of the interferometer and made to collide with the “internal” beams thereby inducing a measurable phase difference between them. [hep-ph/93082...

Despite the very small electron beam emittance in thirdgeneration light sources, the horizontal size of the emitted x-ray beam is still determined mainly by the electron beam divergence. Providing a converging electron beam in an undulator straight section can significantly decrease the spot size of the downstream x-rays, which leads to an increase in the photon flux density on the user sample....

Introduction: Radiation therapy following breast conserving surgery is one of the most common procedures performed in any radiation oncology department. A tangential parallel-opposed pair is almost always the technique of choice for this purpose. This technique is often performed based on 3D treatment planning. The aim of this study was to compare 3D treatment planning for two different energie...

introduction: esophageal cancer is one of the most frequently occurring cancers in iran and having a  high  incidence  rate  among  other  countries.  radiotherapy  is  one  of  the  three  methods  (surgery,  radiotherapy and chemotherapy) for radical or palliative treatment of esophageal cancer. in this method  of treatment, the organs such as heart and spinal cord are regarded as organs at r...

This protocol describes the fabrication and characterization of nanostructures using a novel nanolithographic technique called Patterning via Optical Saturable Transitions (POST). In this technique the chemical properties of organic photochromic molecules that undergo single-photon reactions are exploited, enabling rapid top-down nanopatterning over large areas at low light intensities, thereby...

The beam size at the low emittance configuration of the Photon Factory was measured by the use of the SR interferometer. The spatial coherence of the visible SR beam was measured for both of the vertical and horizontal directions with the wavelengths at 500nm and 633nm. From the measured spatial coherence of the SR beam, the beam size measurements of 87.3μm in the vertical and 261.2 μm in the h...

In external beam radiation therapy (EBRT), the quality assurance (QA) of the radiation beam is crucial to the accurate delivery of the prescribed dose to the patient. One of the dosimetric parameters that require monitoring is the beam output, specified as the dose rate on the central axis under reference conditions. The aim of this project was to validate dose rate calibration of megavoltage p...