scholarly journals Determination of Radiation Quality Correction Factor ksource for HDR Brachythrrapy —Application to 60Co Sources and New 192Ir Source—

RADIOISOTOPES ◽  
2021 ◽  
Vol 70 (5) ◽  
pp. 329-334
Author(s):  
Takahiro Mikamoto ◽  
Tadahiro Kurosawa ◽  
Masahiro Kato ◽  
Jyunya Ishii ◽  
Yuichiro Wakitani
Keyword(s):  
Correction Factor ◽  
Radiation Quality ◽  
Factor I

scholarly journals A PRELIMINARY STUDY OF RADIATION QUALITY CORRECTION FACTOR (KQ) DETERMINATION FOR WELL-TYPE IONIZATION CHAMBER

2020 ◽  
Vol 5 (2) ◽  
Author(s):  
Assef Firnando F ◽  
Okky Agassy Firmansyah ◽  
Cahya Wulandari ◽  
R. Pramuji Ramadhani S
Keyword(s):  
Correction Factor ◽  
Ionization Chamber ◽  
Planning System ◽  
Treatment Planning System ◽  
Radiation Quality ◽  
Ionization Chambers ◽  
Air Kerma ◽  
A Value ◽  
Brachytherapy Source

This paper deals with the determination of the radiation quality correction factor (kQ) well-type ionization chamber for the measurement of Co-60 brachytherapy. The measurement of the brachytherapy source has been done in the hospital brachytherapy facilities. The measurement of air Kerma has been done using three different ionization chambers 0.6 cm3, 30 cm3, 80 cm3, which have calibration factor traceability for Co-60 and one well-type ionization chamber which calibrated for Ir-192. The determination of the radiation quality correction factor (kQ) was determined based on the results of the air Kerma ratio between measurements using ionization chambers, which have traceability to Co-60 and Ir-192 sources. The results of the measurement of the reference air Kerma rate (RAKR) obtained from the three chambers were 21.36, 19.87, 19.34 mGy.m2.h-1, while the results of measurements with ionization chambers get a value of 19.01 mGy.m2.h-1. The kQCal results from 0.6 cm3 ionization chamber get a value of 1.07. The kQCal value was compared with the value of Andreas Schuller’s et al. kQreff of 1.05 and get a deviation of 2.2%. Implementation of the booth kQ value on the results of the RAKR from the HDR1000Plus well-type ionization chamber in the measurement of brachytherapy in two different facilities gets maximal deviation 1.7% with dose value from Treatment Planning System (TPS). The deviation was in the acceptable range of ±5%. Based on this, the use of radiation quality correction factor (kQ) value can be implemented as one method if it does not have the traceability factor calibration of the Co-60 brachytherapy source.

scholarly journals Experimental determination of stereotactic cone size and detector specific output correction factor

2017 ◽  
Vol 90 (1077) ◽  
Author(s):  
Dayananda Shamurailatpam Sharma ◽  
Rahul Kumar Chaudhary ◽  
Sunil Dutt Sharma ◽  
Shaju Pilakkal ◽  
Sachin K Rasal ◽  
...  
Keyword(s):  
Experimental Determination ◽  
Correction Factor ◽  
Specific Output

Application of Thermal Sensors for Determination of Mass Flow Rate and Velocity of Flow in Pipes of Hermetic Systems

2019 ◽  
Vol 826 ◽  
pp. 117-124
Author(s):  
Yurii Baidak ◽  
Iryna Vereitina
Keyword(s):  
Temperature Distribution ◽  
Mass Flow Rate ◽  
Cross Section ◽  
Correction Factor ◽  
Mass Flow ◽  
Flow Rate ◽  
Thermal Sensors ◽  
Pipe Surface ◽  
Pipe Cross Section

The paper relates to the field of measuring technologies and deals with the enhancement of thermoconvective method when it is applied for the experimental determination of such hydrodynamics indicators as mass flow rate and velocity of flow by their indirect parameters - capacity of the heater and the temperatures obtained from two thermal sensors, provided that they are located on the hermetic piping system surface. The issue of determination of correction factor on heterogeneity of liquid temperature distribution in the pipe cross section depending on pipe diameter and fluid movement velocity was clarified. According to the results of numerical calculations, the dependencies of temperature gradient on the pipe surface and the correction factor on the heterogeneity of the temperature distribution along the pipe cross-section under the heater in the function of the velocity of flow in pipes of different diameters are plotted. These dependencies specify the thermal method of studying the fluid flow in the pipes, simplify the experiment conduction, are useful in processing of the obtained results and can be applied in measuring engineering.

Determination of Elastic Modules in Dependence on Orientation by the Resonant Beam Technique

2006 ◽  
Vol 514-516 ◽  
pp. 815-824
Author(s):  
Stephan Puchegger ◽  
Dieter Loidl ◽  
Herwig Peterlik ◽  
Karl Kromp
Keyword(s):  
Correction Factor ◽  
Transversely Isotropic ◽  
Carbon Composite ◽  
Test Material ◽  
Step Process ◽  
Resonant Beam ◽  
Isotropic Carbon ◽  
Elastic Modules ◽  
Beam Technique

A novel procedure, based on the Resonant Beam Technique, and its application to anisotropic composites is presented. The evaluation of the elastic modules of anisotropic materials from the measurement of the transverse eigenfrequency spectra of resonant beams is performed by a two step process: firstly the beams cut out from the test material in different directions are evaluated in-dependently of each other under the assumption, that they are isotropic, solving Timoshenko´s equations using an isotropic correction factor for shear. Secondly the beams are evaluated together as representatives of one anisotropic material, using an anisotropic correction factor for shear. The equipment, developed for such measurements is presented. Finally, the procedure is applied to a transversely isotropic carbon fibre-reinforced carbon composite and the relevance of the results is discussed.

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