SU-GG-I-98: Using MTF to Assess the Influence of X-Ray Focal Spot Blur on the Resolution of Fluoroscopic Imaging Systems

Purpose: The resolution of x-ray fluoroscopy images is dependent on detector characteristics and x-ray focal spot penumbra blur. The purpose of this work was to investigate the influence of focal spot size and geometric magnification (M) on the modulation transfer function (MTF) of flat panel fluoroscopic imaging systems. Method and Materials: The MTF of was measured for two x-ray detectors, three different focal spot sizes, and M in the range...