The Catphan® 500 provides complete characterization of maximum imaging performance for axial and spiral CT scanners. The Catphan® 500 provides a comprehensive set of measurements to measure the maximum performance of your CT scanner’s sensitometry, uniformity, geometric and low-contrast sensitivity. There are variations of the Catphan® 500 phantom that are provided through Varian (CTP 504) and Elekta (CTP 503). EXCELLENT CONDITION, used twice! FREE SHIPPING IN THE CONTINENTAL US!