乳房撮影用超高密度グリッドの検討

概要

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Antiscatter grids have been used widely in diagnostic examination for reducing scattered radiation. In mammography, however, the grid lines become an important problem when trying to detect microcalcifications in the breast. In this study, we examined the effect of grid lines, the reduction of scattered radiation, the increase in radiographic contrast and the patient dose, when using an ultra-high-strip-density grid (80 lines/cm) for mammography. It was found that the grid lines did not interfere with the detection of details on the clinical image. For thicker breast, the image contrast obtained with a grid at 33 kV was higher than that obtained without a grid at 25 kV and also with regard to patient dose the former was smaller than the latter. The grid was very useful in mommography involving ineffectual compressing or young breast.
公益社団法人日本放射線技術学会の論文
1986-01-01