IBEX Virtual Anti-Scatter Grid Detector

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IBEX Innovations (IBEX) has successfully demonstrated, in an InnovateUK PoC project, thepotential for its virtual anti-scatter grid (VASG) concept to improve diagnostic quality andsignificantly reduce patient dose in medical radiological examinationsPhysical anti-scatter grids (ASGs) are extensively used in medical X-ray imaging to reduce thelevels of unwanted X-ray scatter reaching the detector and are essential to achieve diagnosticquality images, especially on thicker body parts such as the torso, head and breast. However,as well as blocking unwanted scatter, physical ASGs also absorb a significant proportion ofuseful direct X-rays and result in patient doses being increased by between a factor of 2x and8x to achieve acceptable images.By contrast, the proposed IBEX Virtual Anti-Scatter Grid (VASG), takes materials datagenerated by the IBEX Multi Absorption Plate (MAP) and advanced IBEX softwarealgorithms and uses it to deconvolve the scattered X-ray component, utilising the scattered Xraydata to improve image contrast without the need for a physical ASG.By usefully employing more of the available X-ray photons to create an image instead of justblocking unwanted scatter with a physical ASG, the VASG is expected to generate improvedcontrast at significantly lower patient doses, whilst further improving the sensitivity of theIBEX materials classification, leading to further improvements in the diagnostic value ofradiographic examinations.The VASG concept relies fundamentally upon the IBEX materials classification technologysuccessfully developed under a previous InnovateUK DoP project, and has been shown towork in a PoC project which completed in July 2015.