First results of the integration of a dose monitoring system in the National Breast Screening Program

To demonstrate how a PACS integrated dose monitoring system, Gray Detector, can help to monitor client dose in a breast screening program, ultimately facilitating the optimisation of acquisition parameters in order to enhance image quality and minimise the dose BreastCheck, The National Breast Screening Program evaluated the RIS-PACS integrated dose monitoring system Gray Detector. For each projection of a screening examination, the displayed average glandular dose (AGD), compression force, compressed breast thickness, selected automatic exposure control (AEC) mode, kV and mAs were recorded. Preliminary data have been collected for three months which have enabled comparison of a number of mammography system types and comparison between systems of the same type, in terms of dose, compression force and other key characteristic parameters. Patient dose data collected so far confirm the results of our annual dose survey. All the mammography systems were monitored on a daily basis. The daily presentation of data provides a useful QA tool, highlighting potential problems with individual mammography systems and illustrating the dependency of client dose on other clinical parameters such as compressed breast thickness and compression force. This will enable standardisation of the acquisition technique in order to reduce client dose and optimize the image quality. A summary of these preliminary results will be presented. The Gray Detector software provides useful functionality for monitoring key parameters of the breast screening examination including in particular, the AGD which may be used to monitor and improve clinical quality performance in the screening program.