scholarly journals Comparison of Panasonic’s Dosimetric System with Gamma-31 Dosimeters

2021 ◽  
Vol 12 (4) ◽  
Author(s):  
Paweł Urban ◽  
Krystian Skubacz ◽  
Izabela Chmielewska
Keyword(s):  

Basic approaches to creating hardware and software for radiation monitoring information systems have been developed in the article. A modern information system for radiation monitoring and control that requires a comprehensive approach and an iterative process of its creation has been developed. The proposed approach to integrating local measuring devices with cloud services, using M2M/IoT technology for remote measurements, advanced semiconductor sensors based on CdTe and CdZnTe radiation detectors, modern microcontroller and communication microchips is highly promising. Developed hardware and software solutions demonstrate increased accuracy due to hardware and software correction of measurement results. A variant of the architectural solution for building a platform for remote access to dosimetric and radiometric measurements is being developed. The solution lies in the direction of improving the parameters of detectors, as well as the characteristics of electronic modules of detecting systems and creating software for controlling the detection process, collecting and digital processing of information, and its adequate presentation to users online. The architecture and structural diagram of a dosimetric system, a sequence diagram, a diagram of a dosimetric system with a subsystem for data exchange over the Internet have been created. A new algorithm for measuring the exposure dose rate of ionizing radiation has been proposed. The block diagram of a microcontroller dosimeter has been developed. The algorithm for correcting the dependence of the sensitivity of the detector based on CdZnTe on the energy of the detected gamma quanta has already been proposed. The algorithm significantly reduces the uncertainty of measuring the radiation dose rate. The architecture and block diagram of the dosimetric system with the possibility of remote access and remote control of the main functions has been presented as well. The calculation of the exposure dose of gamma radiation and the power of the exposure dose with the energy dependence correction have been used. The system elements have proved to be useful for students’ distant laboratory work during the quarantine.


2019 ◽  
Vol 18 (03) ◽  
pp. 262-270
Author(s):  
Rajesh Thiyagarajan ◽  
Arunai Nambiraj ◽  
Durai Manigandan ◽  
Tamilseivan Singaravelu ◽  
Rajesh Selvaraj ◽  
...  

AbstractPurposeThe purpose of this study is to evaluate variation in the treatment hold pattern and quantify its dosimetric impact in breath-hold radiotherapy, using fraction-specific post-treatment quality assurance.Material and MethodsA patient with lung mets treated using intensity-modulated radiation therapy (IMRT) with active breath coordinator (ABC) was recruited for the study. Treatment beam hold conditions were recorded for all the 25 fractions. The linearity and reproducibility of the dosimetric system were measured. Variation in the dose output of unmodulated open beam with beam hold was studied. Patient-specific quality assurance (PSQA) was performed with and without beam hold, and the results were compared to quantify the dosimetric impact of beam hold.ResultsThere was a considerable amount of variation observed in the number of beam hold for the given field and the monitor unit at which the beam held. Linearity and reproducibility of the dosimetric system were found within the acceptable limits. The average difference over the 25 measurements was 0·044% (0·557 to −0·318%) with standard deviation of 0·248.ConclusionPatient comfort with the ABC system and responsiveness to the therapist communication help to maintain consistent breathing pattern, in turn consistent treatment delivery pattern. However, the magnitude of dosimetric error is much less than the acceptable limits recommended by IROC. The dosimetric error induced by the beam hold is over and above the dose difference observed in conventional PSQA.


2011 ◽  
Vol 46 (12) ◽  
pp. 1960-1962 ◽  
Author(s):  
A. Ismail ◽  
P. Pittet ◽  
G.N. Lu ◽  
J.M. Galvan ◽  
J.Y. Giraud ◽  
...  

Author(s):  
S.N. Upadhyay ◽  
A.R. Reddy ◽  
M.M. Gupta ◽  
A. Nagaratnam

PLoS ONE ◽  
2014 ◽  
Vol 9 (1) ◽  
Author(s):  
Lucas Sacchini Del Lama ◽  
Evamberto Garcia de Góes ◽  
Paulo César Dias Petchevist ◽  
Edson Lara Moretto ◽  
José Carlos Borges ◽  
...  

1996 ◽  
Vol 47 (11-12) ◽  
pp. 1193-1196 ◽  
Author(s):  
Gao Juncheng ◽  
Wang Zaiyong
Keyword(s):  

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Kabita K. Satapathy ◽  
G. C. Mishra

A reliable dosimetry is fundamental for quality assurance of the processes and irradiation products. All dosimetric systems for high doses have some limitation with regard to their use. Dosimetric system should be easy to use, fast to measure, and of low cost. Good phosphor which shows high luminescence properties may fulfil the above criteria in some way. MgAl2O4: Dy phosphor has been prepared by solution combustion technique and confirmed with the help of XRD. ML has been excited impulsively by dropping a load of mass 0.7 kg onto the phosphors from various heights; two distinct ML peaks are observed for all the samples. It is observed that MgAl2O4: Dy phosphor shows linear response to gamma-ray dose and low fading which can be used for dosimetric purpose.


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