1. A method for quantifying embolic debris, comprising the steps of: providing an embolic protection filtering device, the device including an elongate shaft and a filter coupled to the shaft; advancing the filtering device through a body lumen to a position near an area of interest; capturing embolic material in the filter; scanning the body lumen with a computed tomography scanner to produce a plurality of digital images; and calculating the volume of the embolic material captured in the filter by analyzing the digital images.