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Enhanced Computed Tomography Scan Improves CT Image Quality and Reduces Costs

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Computed TomographyImage ArtifactsEnhanced Computed Tomography Scan
Hstau Y. Liao
Joachim Frank Lab, Columbia University
Managed By
Andrew Morrow
Technology Licensing Officer
Patent Protection
US Patent 7,840,053

Enhanced Computed Tomography Scan

The enhanced computed tomography (CT) scan can recover 3D CT images taken within a limited angular range or limited quality of data. The proposed method significantly reduces undesirable artifacts in images and shows robustness to noise. Unlike most of the existing CT scan methods, it works on many types of images, does not require an initial image or a reference image, and can be implemented easily and efficiently. One application of this technology is to dental surgery, where limited range tomographic reconstructions can assist with the restoration of the jaw bone for the subsequent tooth implantation, as well as enhance the root canal therapy.

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Improve Image Quality and Reduce Artifacts by Using Enhanced CT Reconstruction

Ideally, to obtain an accurate CT reconstruction, data should be collected along as many views as possible and distributed in a full angular rage. However, due to physical constraints or to minimize costs, either a limited angular range of view is imaged or only a few views are available, resulting in errors in the reconstructed images. The use of standard reconstruction algorithms produces reconstructions with image artifacts, but the enhanced CT scan , using a gradually unmasking algorithm, produces images with high accuracy even when the projection data are not finely sampled in a full angular range.

Lower CT Radiation Risks and Cost Reduction for Enhanced CT Scan

Due to increasing awareness of radiation risks associated with CT, manufacturers are intensely focused on developing technologies which reduce radiation dosage without compromising image quality. Manufacturers’ ultimate objective is to produce the sharpest image quality without having to pay the price of a higher dose of radiation exposure. In addition to the rapidly growing costs of CT imaging services, recently increased concerns regarding excessive radiation in CT have given policymakers another reason to reevaluate the appropriateness of CT procedures. The enhanced CT scan can reduce the operation and product costs, improve the quality of CT scanner, and ultimately reduce CT radiation risks.


  • Improve quality of CT scan image
  • Reduce artifacts during reconstructing CT image
  • Lower doses of X-ray radiation to patients reduces CT radiation risks
  • Decrease CT scanner operation and product costs