Teste | Abstract: 127-1 | ||||
Abstract:Obtaining The Calibration Curve Of The X-Ray Generator GE Model ISOVOLT 160 Kv Using The Maximum Energy Photon Search Technique. According to the principles of radiological protection, practices involving ionizing radiation must be planned and executed in a way that individual dose values, the number of exposed people, and the probability of accidental exposures are as low as reasonably achievable [1]. Therefore, it is necessary that reliable dosimetric quantity meters be used in the execution of radiation dosimetry. This reliability depends not only on the calibration of the meter but also on its performance under certain test conditions. The International Organization for Standardization (ISO) has established sets of reference X-ray beams for dosimeter calibration and testing[ 2] , whose implementation in metrology laboratories must meet specific technical requirements. The implementation of a reference X-ray beam is a procedure for adjusting the irradiation system to produce beams whose characterization parameters meet the requirements defined by the standardization body. One of the important characterization parameters of a characteristic X-ray beam is tube potential.[2] There is a technical difficulty in measuring high voltages, values in the tens or hundreds of kilovolts range[3]; generally, laboratories use the voltmeter from the irradiation systems, whose calibration was done by the manufacturer, and after some time of use, questions may arise about its validity. The updated ISO 4037-1 standard in 2019 does not recommend the use of high-resolution spectrometry systems as they are considered less accurate than voltage dividers.[2] Keywords: Tube voltage, calibration , X Ray generator , Linear fit |