METHOD AND APPARATUS FOR PIECE-WISE RADIOGRAPHIC SCANNING

摘要

A scanning radiographic densitometer constructs a broad area, two-dimensional projection image from a combination of a set of smaller fan beam scans by tilting the axis of each such smaller scan to construct an effective larger fan beam to reduce artifacts caused by height dependent overlap of the multiple fan beams. The data is projected to a non-planar image surface to eliminate local area distortion such as may cause error in density measurements and to permit some overlap without height sensitive effects.