Method for artifact reduction in cone-beam CT images

摘要

A method includes reducing structured artifacts in 3D volumetric image data, which is generated with reconstructed projection data produced by an imaging system (100), by processing the 3D volumetric image data along a z-axis (108) direction. The 3D volumetric image data includes structured artifacts which have high-frequency components in the z-axis direction, and lower-frequency compounds within the x-y plane.

主权项

1. A method, comprising:
reducing structured artifacts in 3D volumetric image data, which is generated with reconstructed projection data produced by an imaging system, by processing the 3D volumetric image data along a z-axis direction, wherein the 3D volumetric image data includes structured artifacts which have high-frequency components in the z-axis direction, and lower-frequency components within the x-y plane, the processing, comprising: de-noising a copy of a set of coronal slices in a working volume of the 3D volumetric image data; generating a set of difference coronal slices by subtracting the set of de-noised coronal slices from the copy of the set of coronal slices; substituting the difference coronal slices for the set of coronal slices in the working volume; de-noising a copy of a set of sagittal slices in working volume; generating a set of difference sagittal slices by subtracting the set of de-noised sagittal slices from the copy of the set of sagittal slices; substituting the difference sagittal slices for the set of coronal slices in the working volume; de-noising a copy of a set of axial slices in the working volume after substituting the coronal and sagittal difference slices in the working volume; and subtracting the set of de-noised axial slices from the 3D volumetric image data.