Elekta Ab (publ)

University Health Network

Elekta Ab

Gregory Bootsma

David Anthony Jaffray

Kevin J Brown

Per Carlsson

Jonas Anders Adler

Markus Eriksson

Marcus Hennix

Frank Verhaegen

Bjorn Nutti

Mark Ruschin

Kevin John Brown

Hakan Nordstrom

Embodiments disclose a method performed by at least one processor for processing a plurality of x-ray projection images of a subject, the method comprising a plurality of operations including reconstructing the projection images to yield a volume reconstruction; segmenting the reconstructed volume by assigning a material type to each voxel; estimating a first set of scatter images corresponding to a subset of the projection images by calculating probabilistic predictions of interactions of x-rays with the subject and applying a low pass spatial filter to the scatter images; estimating a second set of scatter images corresponding to projection images not included in the subset, based on the first set of scatter images; and subtracting, for each projection image, the corresponding scatter image to yield a corrected projection image. Applying the plurality of operations of the method in an iterative process on graphics-processor-quality computational hardware enables real-time scatter correction and reconstruction of CT volume images.

Target-specific dose and scatter estimation in CT images

A highly compact, high-performance volumetric imaging system is proposed, that is integrated with a multi-source Cobalt-60 gamma irradiator for high throughput, high accuracy and minimally invasive fractioned treatments of intracranial, orbital and head-and-neck targets.

Image-guided multi-source radiotherapy

Growing community of inventors

Toronto, Canada

Gregory Bootsma