Dependence of Relative Exposure at Surface Position and mAs Values on High-Voltage Ripple-Rates-Estimated from X-ray Spectra

Abstract

Dependence of relative exposures at surface position of objects and mAs values on high-voltage ripple-rate was estimated using X-ray spectra and spectral speeds of the six screen-film systems. It has been verified quantitatively that 3-phase X-ray units are better than single-phase X-ray units from the view points of patient exposure and image quality in diagnostic radiology.