Abstract: A transparent measuring phantom apparatus and method facilitates rapid testing of the accuracy and repeatability of the scan position mechanisms of patient support table movements of computer assisted tomography (CAT) and magnetic resonance imaging (MRI) systems. The phantom includes clear transparent acrylic sections and radiopaque acrylic numerals which are all adhesively or solvent bonded into the phantom. The phantom includes an acrylic tube enclosing a base plate, a longitudinally extending slice location bar, a plurality of sequential position indicator numerals and operator position indicator numerals between a pair of end plates. The slice locator bar has an array of slice locator holes. In operation, the long axis of the phantom is aligned with the long axis of table movement that determines the slice location. The slice locator holes are drilled into the slice locator bar in a repeating pattern.