CALCULATION AND PROCESSING OF IMAGE, FOR EXAMPLE, IN CONICAL PROJECTION BY X RAYS FOR SAMPLE THREE-DIMENSIONAL OBJECT AND THREE-DIMENSIONAL RECONSTRUCTION OF OBJECT TO BE INSPECTED UTILIZING ABOVE CALCULATION METHOD

摘要

PURPOSE: To speedily generate a sharp image representing a threedimensional body which is being inspected by using a Gaussian weighted function instead of a function representing a support line. CONSTITUTION: A detection cell (i) of a multidetector D decomposes a three-dimensional body as a sample as to the space of a Gaussian basic function by conical projection using an X-ray source S which irradiates the body C by a method capable of securing measuring the attenuation of radiation having passed through the body C. Then the contribution of the basic function corresponding to a volume element projected on each projection image element is calculated and each contribution is equal to the integration of the product of the basic function regarding the volume element and a function representing a support line for irradiating the corresponding image element; and the Gaussian weighted function is used for a method which processes the projected image instead of the function representing the support line. Consequently, the superior quality of the obtained result and extremely-short-time calculation are both made secure.