versión impresa ISSN 0100-3984
versión On-line ISSN 1678-7099
PINA, Diana Rodrigues de; MORCELI, José; DUARTE, Sérgio Barbosa y GHILARDI NETTO, Thomaz. Optimization of mammographic images. Radiol Bras [online]. 2006, vol.39, n.5, pp.351-354. ISSN 0100-3984. http://dx.doi.org/10.1590/S0100-39842006000500010.
OBJECTIVE: The aim of this study is the optimization of mammographic images with a considerable radiation dose reduction. MATERIALS AND METHODS: In the present study the X-ray beam was calibrated for each tension (kVp), aiming at determining the best combination between kVp and mAs, resulting in optical densities of about 1.0 above the base-plus-fog density. RESULTS: This study will bring into question the methods for X-ray beam calibration, the choice of the best image by means of visual grading analysis, comparisons between doses and tube load (kVp × mAs) delivered by the techniques described in this study and by those adopted in the clinical routine at Service of Diagnostic Imaging of Faculdade de Medicina de Botucatu Clinics Hospital, Botucatu, SP, Brazil. Excellent breast radiographic images have been obtained with doses and tube loads reduction of respectively 36.8% and 46.2% in comparison to those employed in our institutions' clinical routine. CONCLUSION: This study is a contribution to the optimization of the risk-benefit ratio for patients and cost-benefit ratio for the institution.
Palabras clave : Mammography; Homogeneous phantom; Quality control; Dose reduction.