ASTM E 1695 - 95 (2013). Standard Test Method for Measurement of Computed Tomography (CT) System Performance

ASTM International, 2013. — 5 p.This test method provides instruction for determining the spatial resolution and contrast sensitivity in X-ray and γ-ray computed tomography (CT) images. The determination is based on the examination of the CT image of a uniform disk of material. The spatial resolution measurement is derived from an image analysis of the sharpness at the edge of the disk. The contrast sensitivity measurement is derived from an image analysis of the statistical noise at the center of the disk