Dual-Grid Multi-Source X-ray Tube

Abstract

Researchers at the University of California, Davis have developed an advanced multi x-ray source array system employing dual cathode designs that enhance computed tomography (“CT”) imaging by enabling pulsed, spatially multiplexed x-ray emission with reduced artifacts.

Full Description

This technology introduces a multi x-ray source array system featuring multiple rotating anodes arranged on a single shaft, each paired with dual thermionic cathode assemblies capable of rapid pulsed operation. By electronically modulating charged particle beams with dual grids, x-rays are selectively generated from discrete anode focal spots, creating a two-dimensional array of individually controllable x-ray sources. The system rotates in unison with a detector array around the patient, enabling full tomographic data acquisition with minimal cone beam artifacts. Switching x-ray emission between odd and even anode sets eliminates beam overlap and improves image quality. Additionally, the technology offers flexible spatial control of x-ray focal spots and enhanced field-of-view coverage compared to traditional single-source CT systems.

Applications

• Whole body and general-purpose computed tomography scanners in clinical radiology. 
• Cone beam computed tomography for dental, orthopedic, and interventional imaging. 
• Security scanning systems such as airline baggage and package inspection. 
• Stereoscopic and multi-angle x-ray imaging requiring rapid source switching. 
• Industrial non-destructive testing and material analysis using computed tomography.

Features/Benefits

• Reduces cone beam artifacts through multiplexed source geometry and pulsed x-ray emission. 
• Improves image quality and ensures complete sampling with large field-of-view coverage. 
• Allows rapid switching and precise control of x-ray focal spots with dual grid cathode design. 
• Enables complex x-ray source sequencing through a two-dimensional planar array arrangement. 
• Shares filaments between cathodes for efficient use of filament resources. 
• Supports both medical and non-medical computed tomography applications. 
• Provides sub-millisecond temporal precision of pulsed x-ray beams for flexible imaging protocols. 
• Mitigates beam overlap on large area detectors during simultaneous multi-source operation. 
• Addresses limited spatial sampling and z-axis coverage in traditional cone beam CT. 
• Simplifies mechanical design challenges through multiplexing and dual cathode architecture.

Patent Status

Patent Pending