Determinação da Concentração de Contraste de Iodo em Mamografia Digital de Dupla Energia

Abstract

The detection of suspicious masses in mammographic exams are compromised by breast tissue overlapping on the image. The dual energy digital mammography technic uses two exposures with different energies obtaining two mammographic imagens, where their subtraction would cancel part of the overlapping tissue enhancing its visualization. The developing of carcinomas induces angiogenesis, an increase on the vascularization in the region of the lesion. Therefore, with the addition of an intravenous Iodine solution it would accumulate at the carcinoma region generating a contrasted object that would be highlighted by the dual energy technique. In this work we calculated the signals obtained by the detector ( from the two exposures we can fit an inverse function that calculate the mass thickness of Iodine as a function of the signal, providing quantitative data regarded to the Iodine concentration. Comparing the values obtained by calibration data for the mass thickness of Iodine and those obtained from the inverse function we verify that they are equal, showing that the function fits the proposed model for contrasted dual energy digital mammography.