Basic study of one-shot dual energy subtraction sialography

Abstract

I applied one-shot dual energy subtraction by computed radiography using iodinated contrast medium to sialography. In this study, a basic experiment was carried out on the effects of scattering radiation on subtraction using a bone-iodine step phantom sandwiched between soft tissue plates and a head phantom with fixed tubes containing contrast medium (head·contrast medium phantom). The relationship between the tube voltage (50–100 kVp) and the thickness of a copper (Cu) filter as well as the presence or absence of a grid was studied. Subtraction images were clearer without a grid than with a grid. These findings suggest that scattering radiation is one of the factors responsible for the favorable effects of one-shot dual energy subtraction sialography.