Cone-Beam Reconstruction Using the Backprojection of Locally Filtered Projections

Technology for X-ray detection in cone-beam geometry is rapidly improving and offers more and more potential for the construction of robust computed tomography systems for high-resolution volume imaging. In order to optimally build such systems, problem of cone-beam image reconstruction needs to be understood. Our technology consists of a new methodology for reconstructing images from cone-beam projection data. This methodology facilitates exact reconstruction with limited measurements and does not require as much data as other known methods in order to produce high quality images.

CT scans account for 40% of the total X-ray dose even though they comprise only 4% of medical imaging exams. In CT scanners the dosage of X-ray a patient receives can be substantially reduced when performing region of interest imaging. In this case full cross section images are not needed. This technology may for the first time allow accurate quantitative cone-beam imaging to be done using systems where the detector is not sufficiently large to capture the full width of the projection of the object being scanned. Usage of a smaller detector area correspondingly reduces the radiation dose that is delivered to the patients. This technique has applications in medical and industrial CT scanners.

Stage of Development
A utility patent application has been filed with the U.S. Patent and Trademark Office. This technology has been demonstrated to work in proof-of-concept experiments and is part of an active and ongoing research program. It is available for developmental research support/licensing under either exclusive or non-exclusive terms.

Additional Info
*Jed Pack, Fr�d�ric Noo, �Cone-beam reconstruction using backprojection of locally filtered projections�, Source: IEEE Transactions on Medical Imaging, 24(1), 1-16, 2005.

Inventor(s): Jed Douglas Pack, Frederic Noo, Rolf Clackdoyle

Type of Offer: Licensing

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