background: different kinds and models of personal dosimeters are used in individual monitoring by workers.  performance testing as part of approval procedures is carried out to demonstrate that the essential performance specifications are routinely maintained. there are four service providers in iran which use different luminescence techniques (i. e. tld and rpl) with various kinds of dosimete...

PURPOSE To design, construct, and evaluate an anthropomorphic phantom for evaluation of intensity-modulated radiation therapy (IMRT) dose planning and delivery, for protocols developed by the Radiation Therapy Oncology Group (RTOG) and other cooperative groups. METHODS AND MATERIALS The phantom was constructed from a plastic head-shaped shell and water-equivalent plastics. Internal structures...

For the purpose of dose measurement using a high-dose rate (192)Ir source, four methods of thermoluminescent dosimeter (TLD) calibration were investigated. Three of the four calibration methods used the (192)Ir source. Dwell times were calculated to deliver 1 Gy to the TLDs irradiated either in air or water. Dwell time calculations were confirmed by direct measurement using an ionization chambe...

An urgent requirement for 3D dosimetry has been recognized because of high failure rate (~25%) in RPC credentialing, which relies on point and 2D dose measurements. Comprehensive 3D dosimetry is likely to resolve more errors and improve IMRT quality assurance. This work presents an investigation of the feasibility of PRESAGE/optical-CT 3D dosimetry in the Radiologic Physics Center (RPC) IMRT H&...

We have reported the thermoluminescence (TL) response of five different diameters ~120, 241, 362, 483, and 604 μm of 6 mol percent Ge-doped optical fibres. The perfomance of the Ge-doped optical fibre are compared with commercially available TLD-100 chips (LiF:Mg,Ti) in terms of their sensitivity and minimum detectable dose (MDD). The irradiation was performed using X-ray machine (Model ISO ‘Na...

--3-dimensional breast radiotherapy is the most prevalent techniques, carried out in all radiotherapy centers of the world including Iran. The objective of this study is to investigate the dose rate supplied to the opposite breast during the radiotherapy of breast cancer using the designing method of 3-dimensional therapy. 32 female patients suffering from breast cancer participated in this stu...

The accuracy of the photon convolution/superposition dose algorithm employed in a commercial radiation treatment planning system was evaluated for conditions simulating tangential breast treatment. A breast phantom was fabricated from machineable wax and placed on the chest wall of an anthropomorphic phantom. Radiographic film was used to measure the dose distribution at the axial midplane of t...

One of the main aims for modern video surveillance is to capture clear imagery of Region of Interest (ROI) in large-scale. However, it is hard to achieve the goal by zooming when the ROI is far from the surveillance system. A station-active dual camera (SADC) system is designed to acquire the detailed and overall information of object at distance. The target can be detected and tracked in the w...

Background: Different kinds and models of personal dosimeters are used in individual monitoring by workers.  Performance testing as part of approval procedures is carried out to demonstrate that the essential performance specifications are routinely maintained. There are four service providers in Iran which use different luminescence techniques (i. e. TLD and RPL) with various kinds of dos...

This study has investigated the optically stimulated luminescence (OSL) of household salt and chemically pure NaCl after exposure in different radiation environments. The response relative to thermoluminescent dosimetry using LiF has been investigated to determine if OSL in NaCl can be considered as an alternative to measurements of thermoluminescence in LiF. A selection of staff members at the...