System and method for tomographic reconstruction utilizing circular trajectory and scanogram to reduce artifacts
AssigneesKabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
InventorsSatoru Nakanishi, Yu Zou, Aleksandr Zamyatin, Michael D. Silver
Life of this patent
Estimating the term…
Abstract
A computed tomography apparatus and method using line data estimated from circle data and scanogram data. An image of a subject is reconstructed using the circle data and the estimated line data. The circle data and scanogram data may be weighted in estimating the line data. The apparatus and method are useful in diminishing or eliminating streak artifacts in reconstructed images such as images including the spine.
Claims33
A computed-tomography apparatus, comprising:
- an x-ray source;
- an x-ray detector disposed to receive x-rays from said x-ray source;
- a unit to collect circle data and scanogram data;
- a processing unit for estimating line data from said circle data and said scanogram data and for performing reconstruction of an image using said circle data and said estimated line data.
A computed tomography method, comprising:
- exposing a subject to x-rays;
- collecting circle data;
- collecting scanogram data;
- estimating line data using said circle data and said scanogram data;
- and
- reconstructing an image of said subject using said estimated line data and said circle data.
A computer readable-medium containing instructions that may be executed by a computer to perform a method, comprising:
- collecting circle data from an x-ray scan of a subject;
- collecting scanogram data from said x-ray scan;
- estimating line data using said circle data and said scanogram data;
- and
- reconstructing an image of said subject using said estimated line data and said circle data.
Dependencies are inferred from the claim text.