Estimation of Out-of-Field Dose Variation using Markus Ionization Chamber Detector

Calibration of iridium-192 source by ionization chamber for high dose rate brachytherapy

Background: The effectiveness and safety of brachytherapy treatment is mainly concerned with the calibration of sources and their traceability to internationally accepted Standards. Secondary Standard Dosimetry Laboratory (SSDL) does not offer calibration of ionization chambers with gamma-ray spectrum of high dose rate source 192Ir . This work has been carried out to calibrate the high dose rat...

Ionization Chamber Detector for X-ray with Beam Position Monitoring

Ionization Chambers have been commonly used at beamlines in many synchrotron radiation facilities. Typical ADC ion chambers are pictured in Figure 1. The chambers generate a current proportional to the incident X-ray beam intensity. The ionization chamber allows users to determine the change in beam position in a single axis by comparing two signals that are created as the beam passes through t...

Dose Calculation Accuracy of Radiotherapy Treatment Planning Systems in Out-of-Field Regions

assessment of the efficiency of s.p.g.c refineries using network dea

data envelopment analysis (dea) is a powerful tool for measuring relative efficiency of organizational units referred to as decision making units (dmus). in most cases dmus have network structures with internal linking activities. traditional dea models, however, consider dmus as black boxes with no regard to their linking activities and therefore do not provide decision makers with the reasons...

Characterization of a CT ionization chamber for radiation field mapping.

A pencil-type ionization chamber, developed at Instituto de Pesquisas Energéticas e Nucleares (IPEN), was characterized with the objective to verify the possibility of its application in radiation field mapping procedures. The characterization tests were evaluated, and the results were satisfactory. The results obtained for the X radiation field mapping with the homemade chamber were compared w...