Determination of the tube voltage from clinic mammo-graphic system using two types of detectors
DOI:
https://doi.org/10.15392/bjrs.v3i1A.175Keywords:
Dosimetry, X-ray, MammographyAbstract
The use of X rays for diagnostic radiology is very common and important to Medicine, including mammographic diagnosis focusing decreasing of the doses applied to the patients and preserving high quality of the diagnostic image. A quality control program of the irradiation systems it is necessary to control periodically the performance of the X-ray systems applied in that diagnosis in order to obtain the best results in that diagnosis. The verification of the beam characteristics is made by using standard dosimetric procedures which include the determination of the kilovoltage and the kerma rates for the different radiation qualities applied in the diagnosis. The Instruments Calibration Laboratory (LCI) of IPEN perform calibration in dosemeters used in radiation dosimetry (in diagnostic radiology) for many years and are improving their methodology to attend the actual demand of that equipments used in quality control of that X-radiation systems. The objective of that paper were the measurements of kVp and air kerma produced for one mammographic system of LCI, Model VMI – Graphmammo AF (Philips) using two different measurements systems from PTW (Diavolt) and Radcal (kVp meter) that procedure is just to determine the stability of that system that is used to perform diagnosis in mammography level. The results obtained with the two systems utilized shows good agreement. That measurement can be applied at a routine quality control program of that X-ray system.
Downloads
References
INCA - Instituto Nacional Do Câncer. Estimativa | 2012 - Incidência de Câncer no Brasil. Rio de Janeiro, RJ - 2011.
IEC - International Electrotechnical Commission. Medical electrical equipment – Do-simetric instruments used for non-invasive measurement of X-ray tube voltage in diagnostic radiology. IEC 61676, Geneva, 2002.
IAEA / ARCAL XLIX – International Atomic Energy Agency / Acuerdo de Cooperaci-ón Regional para la Promoción de la Ciencia Nuclear y Tecnología em América Latina y el Ca-ribe. Protocolos de Control de Calidad en Radiodiagnostico. – 2001.
ANVISA - Agência Nacional De Vigilância Sanitária. Radiodiagnóstico Médico: De-sempenho de Equipamentos e Segurança. Brasília: Ministério da Saúde, 2005.
Published
Issue
Section
Categories
License
Copyright (c) 2015 Brazilian Journal of Radiation Sciences
This work is licensed under a Creative Commons Attribution 4.0 International License.
Licensing: The BJRS articles are licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/