The linear accelerator used in this study was a Siemens Primus Plus with photon energy 6 MV. A Scanditronix blue phantom (Wellhofer, Germany) (50 cm ×50 cm ×50 cm) and the Farmer ionization chamber 0.6cc were applied for measuring. Total scatter output factors, Scp, were measured at 10-cm depth water (S′ in Figure 2 ) and source-surface distance (SSD) 100cm and for field sizes from 5×5cm2 to 40×40cm2. For Sc measurements, a polystyrene build-up cap was employed at maximum depth and source-surface distance (SSD) 100-cm. The Sp was measured indirectly using Eq. 1 as a routine method and then compared with Sp which was calculated by Eq.6, 7.
Primus plus
Manufactured by Siemens
Primus Plus is a laboratory equipment product from Siemens. It is a multi-functional device designed for various laboratory applications. The core function of Primus Plus is to perform advanced analytical tasks and measurements with high precision and accuracy.
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Lab products found in correlation
3 protocols using primus plus
1
Photon Output Factor Measurement
2
Neutron Dosimetry of Medical Accelerators
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In this study, neutron contamination of three medical linear accelerators, Siemens primus (15 MV photon beam), Siemens primus plus (18 MV photon beam), and Siemens artiste (15 MV photon beam) was investigated. These accelerators are being used in the Reza Radiation Oncology Center in Mashhad (Iran). Neutron dosimetry was carried out by CR-39 films.
The PAD (poly-allyl-diglycol-carbonate, C 12 H 18 O 7 ) films with trade name CR-39 in dimensions of 2.5 cm × 2.5 cm × 1.5 mm were provided from the TASL company[ 13 ] Bristol, London, United Kingdom. These films, due to their insensitivity to radiofrequency and low-LET radiations, are widely used for fast-neutron dosimetry. Neutron dose can be determined from the total tracks on the film by the application of a calibration curve obtained by a standard neutron source.
The PAD (poly-allyl-diglycol-carbonate, C 12 H 18 O 7 ) films with trade name CR-39 in dimensions of 2.5 cm × 2.5 cm × 1.5 mm were provided from the TASL company[ 13 ] Bristol, London, United Kingdom. These films, due to their insensitivity to radiofrequency and low-LET radiations, are widely used for fast-neutron dosimetry. Neutron dose can be determined from the total tracks on the film by the application of a calibration curve obtained by a standard neutron source.
3
Electron Beam Leakage Dose Measurement
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This part of the experiment was performed on the Siemens Primus Plus linear accelerator with 25 cm × 25 cm applicator and 15 MeV electron beam. The setup as illustrated in Figure 2 was used. Farmer ion chamber was put in the arm of the jig at a distance of 2 cm from the inner edge of the applicator. When it was accurately put, SSD was adjusted to 100 cm. Then, the ion chamber was moved at different heights of 6, 15, 27, and 35 cm from the applicator's bottom of edge according to Figure 2, and the percentage of radiation leakage dose was calculated using Formula 1.
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