Low-Dose Fluoroscopy for Neuroradiology

A low-dose scanning-beam digital x-ray (SBDX) fluoroscopy system is being developed. The expected pexposure is 10% of conventional fluoroscopy with comparable image quality. The low-dose capability ivirtually eliminating scattered radiation detection, elimination of the anti-scatter grid, improvedlarger patient entrance aperture. A prototype SBDX system, designed for cardiac fluoroscopy, is nearInterventional neuroradiology would also benefit greatly from a decrease in exposure. However, the napplication will require an increase in SBDX spatial resolution. This proposal seeks to redesign thefor neuroradiology and test the performance of the redesigned system. The specific aims of this propthe modulation transfer function of the prototype SBDX; ii) modify the prototype to increase spatialthe increase in vessel contrast in the scatter-free SBDX image, in a neuroradiological setting; iv)patient exposure resulting from SBDX in a neuroradiological setting. The ICRP has recommended and tha system of dose limitation for patients based on justification and ALARA. The successful completionwould allow the construction of a neuroradiology x-ray system with previously unachieved levels of s