The mammographic images will be examined for variables which may affect the client experience. These will include e.g. the compression force applied to the breast tissue during mammography, and features of the breast positioning technique. Thus, the measurement toolkit will have multiple parts. The investigators expect it to be capable of rigorous routine service and performance evaluation in mammography, of identifying what nature of interventions are needed to improve mammography experiences, and of evaluating the effectiveness of such interventions in the future.