Breast cancer control represents one of the greatest challenges that public health service faces nowadays. In order to decrease the death rate from cancer in women, the AGEVISA-PB implemented a Mammography Quality Control Programme to improve the performance of mammographic equipment in Paraiba - Brazil. The evaluation method of these devices is accomplished through breast phantoms that simulate structures found on a mammogram in order to assure the quality of radiographic images. Even so, evaluation by technicians still suffers limitations caused by the visual inspections by individuals, such as long-time benchmarking and subjectivity. The main purpose of this research is to develop a computerised system that analyses radiological images of phantom MAMA-CDM and correlates with human visual perception. The results indicate that the system developed can be used as a second opinion, thus becoming a tool of great utility in aiding medical diagnosis.