SBIR-STTR Award

The revolution in digital processor and memory technology is making it feasible to execute Computed Tomography, CT, at much higher rates. Use of multiple fixed sources eliminates the rate limitation of mechanical scanning. The final limit to accurate CT scanning of objects in rapid continuous motion is artifacts produced by different projection planes through the object. Methods of minimizing the effects of plane offsets are defined. They include interpolation between sequential scans and maximum likelihood weighting to maximize the consistency of the reconstruction. The improvement of these techniques over straightforward reconstruction of projections in differing planes will be quantified. An Algebraic Reconstruction Technique is used that can accommodate any source-detector geometry. X-rays are the most common method of noninvasive internal inspection. Rapid, economical, accurate CT scanning will greatly facilitate all types of X-ray inspection now used and make many more feasible. Some examples are parts and assembly inspection, inspection of injection molds, and composite materials for voids, and inspection of machines, plumbing and pressure vessels, and bulk materials for cracks, voids, or adulteration.

The revolution in digital processor and memory technology is making it feasible to execute Computer Tomography (CT) at significantly higher rates. Use of multiple, fixed sources eliminates the rate limitation of mechanical scanning commonly used today. Compensation for motion, artifacts produced by different projection planes allows for accurate CT scanning. Methods of minimizing the effects of motion, and other inter-related noise sources, are defined. The integration of these corrections into current reconstruction procedures will allow for very precise and fast inspection and discrimination. Real-time implementation and structural fabrication of the system enclosure is also required. X-rays are the most common method of nondestructive internal inspection. Rapid, economical, and accurate CT scanning will greatly facilitate all types of X-ray inspection now used and make many more feasible. Some examples are parts and assembly inspection, agriculture, inspection of injection molds, composite-materials for voids, and the inspection of machines, plumbing and pressure vessels, and bulk materials for cracks, voids, etc.