INVESTIGADORES
BLANCO Susana Alicia Ana
congresos y reuniones científicas
Título:
Latin American results in diagnostic mammography under IAEA Programme: Radiological Protection of Patients in Medical Exposures (TSA3)
Autor/es:
MORA, PATRICIA; BLANCO SUSANA; KHOURY, HELEN JAMIL; FERNANDO LEYTON; JUAN CÁRDENAS; MARÍA YOLANDA DEFAZ; CAROLINA ESCOBAR; FLAVIANO TELÓN; GARCÍA AGUILAR, JUAN; ´ROAS NORMA; MIRTA GAMARRA; DANIEL BLANCO; ANA ROSA QUINTERO
Lugar:
Glasgow (No se puede poner Escocia)
Reunión:
Congreso; IRPA XIII; 2012
Institución organizadora:
IRPA
Resumen:
Latin American countries (Argentina, Brazil, Chile, Costa Rica, Cuba, Ecuador, El Salvador, Guatemala, Mexico, Nicaragua, Paraguay, Uruguay and Venezuela) working under IAEA Technical Cooperation Programme TSA3 Radiological Protection of Patients in Medical Exposures have joined efforts in the optimization of radiation protection in mammography practice. Through surveys of image quality and patient doses, the region has a unique database of dose reference levels for analog and digital equipments that will direct future optimization activities, towards the early detection of breast cancer among asymptomatic women. During RLA9/057 (2007-2009) 20 institutions participated in a dose survey that included verification by the radiologist of European image quality criteria for each patient; in this phase only analog equipment was included. Regional training on methodology and measurement equipment was addressed in May 2007. Mean Glandular Dose (MGD) was estimated using the incident kerma in air and relevant conversion coefficients for both projections (CC and MLO). For phase two, RLA9/067 (2010-2011), it was decided to include also digital systems in order to see their impact in future dose optimization activities. Any new country that joined the project received training in the activities through IAEA expert missions. 32 new institutions participated (12 analog and 20 digital equipment). A total of 2600 patient doses were collected during this study. 87% fulfilled 80% of image quality criteria and from them MGD (mGy) for both projections were estimated for each institution and country. Regional results (75 percentile in mGy) show for CC and MLO respectively: RLA9/057 (analog) 2.68 and 3.18; RLA/067: 2.57 and 3.15 (analog) and 2.69 and 2.90 (digital). Regarding only digital equipment for CC and MLO respectively, CR systems showed 2.59 and 2.93 and DR systems 2.78 and 3.04. Evaluation of image criteria for digital systems showed a higher score on an overall basis. Based on the BSS reference dose (3mGy), it can be observed that there is enough room to start optimization processes in LA; several countries or even particular institutions have values much higher than the 3mGy. Main issues to address are: lack of well established QA programs for mammography, not enough medical physicists with training in mammography, an increase in patient doses with the introduction of digital equipment and to create awareness on radiation risk and optimization strategies.