Characteristic-Curve Measurement Based on Bootstrap Method by Using Calcium Phosphate in Mammography

概要

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The measurement method of the characteristic curve for mammographic screen-film system has not been established due to difficulties in terms of exposure quality at low kV. In this paper we propose a bootstrap method by use of specific stepwedge for characteristic curve in mammography. The stepwedge of ten steps made from calcium phosphate with 10 different material densities was employed. The tube voltage and mAs were changed from 25kV to 32kV and from 20mAs to 100mAs, respectively, in the experiment. The results of the curves measured indicate the effectiveness of our method, although additional experiments to investigate the accuracy and precision of the data are required.
Medical Imaging and Information Sciencesの論文