ABSTRACT
The purpose of this paper was to estimate mean glandular dose levels (DG) in six digital mammography systems in Santiago, Chile, and to propose preliminary reference levels to execute mammography in Chile. The study was carried out assessing two direct digital systems and four computer-based radiography (CR) systems. Estimates of DG were calculated for different thicknesses of polymethyl methacrylate according to the quality control protocol in digital mammography of the Spanish Society of Medical Physics and NHSBSP Equipment Report 0604 Version 3. DG values ranged between 0.64 and 7.26 mGy for a range of 20- to 70-mm thickness, respectively. Thirty-six per cent of DG was higher than the acceptable dose level and 100 % of DG was higher than the desirable level. It is therefore necessary to optimise doses. The initial proposal to establish dose reference levels for DG would range between 0.90 and 6.40 mGy for a thickness range of 20 to 70 mm.
Subject(s)
Breast/radiation effects , Mammography/methods , Radiographic Image Enhancement/methods , Chile , Female , Humans , Mammography/instrumentation , Polymethyl Methacrylate , Quality Control , Radiation Dosage , Radiometry , Reference ValuesABSTRACT
Los avances tecnológicos de los últimos años en la resonancia magnética (RM) y la utilización de medio de contraste paramagnético han significado un gran impacto en la imagenología mamaria, especialmente en la evaluación preoperatoria del cáncer y en el seguimiento de los pacientes tratados por el cáncer de mama. En este artículo se resumen los aspectos técnicos de la realización de una RM mamaria, se detallan las principales indicaciones y se mencionan las futuras aplicaciones posibles
