Room: Karl Dean Ballroom C
Purpose: Traditional x-ray imaging uses a point x-ray source and a 2-D detector. Its broad x-ray beam involves large amount scattered x-ray photons which cause cupping artifacts and elevated imaging dose. We propose to develop a new tetrahedron (TB) imaging system that can overcome the problems of traditional x-ray systems.
Methods: A linear x-ray source array generates a stack of narrowly collimated fan-shape x-ray beams that sequentially scan through the imaging subject. The exit beams are received by a multi-row X-ray detector array positioned orthogonal to the source array. The transmission data are composited into 2-D planar images by a shift-and-add algorithm, which can reconstruct the features at one selected depth without blurring, similar to the light-field optical camera. A high power multi-pixel thermionic emission x-ray source has been developed to realize the TB systems.
Results: Because of the narrow fan beam geometry, the TB geometry has a very low scatter-to-primary ratio (SPR) even without anti-scatter detector grid. It can further take advantage of the high-quality CT detector which has a higher acquisition speed, dynamic range and detective quantum efficiency (DQE) to achieve high speed low dose imaging. A multi-pixel thermionic emission x-ray (MTEX) source has been developed for TB systems.
Conclusion: TB imaging based on linear scan sources is a new x-ray imaging technology that may overcome the limitations of traditional cone beam systems.
Not Applicable / None Entered.