Known-component metal artifact reduction (KC-MAR) for cone-beam CT
نویسندگان
چکیده
منابع مشابه
A New Method for Metal Artifact Reduction in CT Scan Images
Introduction In CT imaging, metallic implants inside the tissues cause metal artifact that reduce the quality of image for diagnosis. In order to reduce the effect of this artifact, a new method with more appropriate results has been presented in this research work. Materials and Methods The presented method comprised of following steps: a) image enhancement and metal areas extraction, b) sinog...
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A new method to reduce artifacts (MAR), produced by high-density objects, especially metal implants (MI), in X-ray CBCT is presented. MIs located in the field of view (FOV) result in artifacts influencing clinical diagnostics and treatments. The novel method reduces metal arti-facts by virtually replacing MIs by tissue objects of the same shape. This corrected data can be reconstructed with sig...
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In this paper, four approximate cone-beam CT reconstruction algorithms are compared: Advanced single slice rebinning (ASSR) as a representative of algorithms employing a two dimensional approximation, PI, PI-SLANT, and 3-PI which all use a proper three dimensional back-projection. A detailed analysis of the image artifacts produced by these techniques shows that aliasing in the z-direction is t...
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ژورنال
عنوان ژورنال: Physics in Medicine & Biology
سال: 2019
ISSN: 1361-6560
DOI: 10.1088/1361-6560/ab3036