Dosis en mamografía: Estudio preliminar
DOI:
https://doi.org/10.15381/rif.v5i01-02.8787Keywords:
Mammography, granular dose, simulator, X-rayAbstract
Mammography is the most importan! method to detect lesions in the breast with this technique one can detect small tumors befare clear clinical symptoms appear. Mammographic Image of require high quality standards due that the extremely low contras!between the normal and pathological areas in the breast, e.g., they have similar attenuation and absorption coefficient. The X-ray mammographic systems, used in this study are Senographe 500t and a Senographe DMR, a detector with a RadCal ionization chambers calibrated to the qualities of mammographie X-ray beams, and a breast simulator that is a phantoms of polymethylmethacrylate (PMMA) of severa! thicknesses with the equivalence of 50% of the glandular tissue. The results obtained indicate that the values of doses at the entrance surface of a breast (DES) are greater the reference value 20 mGy to 5,0 cm of PMMA and the values of the mean glandular dose (MGD) exceed the reference value of 2,1 mGy for 5, lcm of compressed thick breast. We consider that the values high of the EDS and MGD are due that the X-ray system no meeting in good condition or for user of X-ray spectra no suitable, sois recommendable be carried out test of quality control to the X-ray systems and also realize studies, or characterize the of x-ray mammographic spectra. © 2002 CSI. All rights reservedPublished
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Copyright (c) 2002 Fernando Marquez P., Nora Acosta R., Tony Benavente, Maximo Poma
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