Low-frame-rate pulsed fluoroscopy vs low-exposure-rate continuous fluoroscopy: a comparison

摘要

Abstract: Although improved video camera sensitivity has been responsible for reducing the radiation exposure rate in conventional fluoroscopy substantially over the last two decades, considerable further improvement is possible. Over the same period two methods for reducing fluoroscopic exposure have been implemented by various researchers: pulsed X-ray irradiation and progressive video acquisition of the image intensifier output at low frame rate with exposure per frame comparable to conventional fluoroscopy; and continuous irradiation with a combination of low exposure rate, high detector gain and X-ray beam filtration. Neither has come into widespread clinical use. This paper proposes a model of fluoroscopic patient exposure and compares pulsed fluoroscopy with other methods of exposure reduction. The implications of this model for fluoroscopic exposure rate optimization are discussed.!9