Filtration influence in a constant potential X-ray machine peak voltage measurements
DOI:
https://doi.org/10.15392/bjrs.v5i2.261Keywords:
peak voltage, practical peak voltage, spectrometry, endpoint, non invasiveAbstract
This work shows the peak voltage measurements for several beam filtrations used in diagnostic radiology, using two types of non-invasive detectors; a voltage meter and a high-resolution spectrometer. The technique chosen for the voltage peak measurements with the spectrometer was the endpoint. The results were compared to the measured ones and showed good similarity to the nominal values. However the voltage meter detector used in this work presented errors for heavier filtrations.Downloads
References
IEC - International Electrotechnical Commission. Medical diagnostic X-ray equipment—Radiation conditions for use in the determination of characteristics: IEC 61267, Geneve: IEC, 2005.
ISO – International Organization for Standardization. X and gamma reference radiations for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy – Part 1: radiation characteristics and production methods: ISO 4037-1, Geneve: ISO, 1996.
HOURDAKIS, C.J. Determination of the diagnostic X-ray tube practical peak voltage (PPV) from average or average peak voltage measurement. Phys. Med. Biol. v. 56, p. 2199–2217, 2011.
JCGM – JOINT COMMITTEE FOR GUIDES IN METROLOGY. Evaluation of measurement data – Guide to the expression of uncertainty in measurement. Sévres, 2008: JCGM, 2008
POTIENS, M. P. A.; CALDAS, L. V. E. . Calibration of kVp meters used in quality control tests in diagnostic radiology by spectrometry. Radiation Protection Dosimetry, Inglaterra, v. 98, n.3, p. 343-346, 2002.
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