Ray-wise weighted helical cone beam filtered backprojection algorithm for image reconstruction under moderate cone angle

2007 ◽  
Author(s):  
Xiangyang Tang ◽  
Jiang Hsieh
Keyword(s):  
Image Reconstruction ◽  
Cone Angle ◽  
Cone Beam ◽  
Filtered Backprojection

scholarly journals A cone-beam X-ray computed tomography data collection designed for machine learning

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Henri Der Sarkissian ◽  
Felix Lucka ◽  
Maureen van Eijnatten ◽  
Giulia Colacicco ◽  
Sophia Bethany Coban ◽  
...  
Keyword(s):  
Machine Learning ◽  
Computed Tomography ◽  
Image Reconstruction ◽  
Data Collection ◽  
Cone Angle ◽  
Open Data ◽  
Cone Beam ◽  
Projection Data ◽  
X Ray ◽  
Artefact Reduction

Abstract Unlike previous works, this open data collection consists of X-ray cone-beam (CB) computed tomography (CT) datasets specifically designed for machine learning applications and high cone-angle artefact reduction. Forty-two walnuts were scanned with a laboratory X-ray set-up to provide not only data from a single object but from a class of objects with natural variability. For each walnut, CB projections on three different source orbits were acquired to provide CB data with different cone angles as well as being able to compute artefact-free, high-quality ground truth images from the combined data that can be used for supervised learning. We provide the complete image reconstruction pipeline: raw projection data, a description of the scanning geometry, pre-processing and reconstruction scripts using open software, and the reconstructed volumes. Due to this, the dataset can not only be used for high cone-angle artefact reduction but also for algorithm development and evaluation for other tasks, such as image reconstruction from limited or sparse-angle (low-dose) scanning, super resolution, or segmentation.

A three-dimensional-weighted cone beam filtered backprojection (CB-FBP) algorithm for image reconstruction in volumetric CT—helical scanning

2006 ◽  
Vol 51 (4) ◽  
pp. 855-874 ◽  
Author(s):  
Xiangyang Tang ◽  
Jiang Hsieh ◽  
Roy A Nilsen ◽  
Sandeep Dutta ◽  
Dmitry Samsonov ◽  
...  
Keyword(s):  
Image Reconstruction ◽  
Three Dimensional ◽  
Cone Beam ◽  
Filtered Backprojection ◽  
Volumetric Ct
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