Patent ID: 11961166
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. An imaging device of claim 7 comprising:
a radiation detector array arranged to acquire imaging data;
a computer; and
a non-transitory storage medium storing instructions readable and executable by the computer to perform an image reconstruction method including:
performing iterative image reconstruction of the acquired imaging data to generate a reconstructed image; and
during the iterative image reconstruction, applying an edge preserving prior having a spatially varying edge preservation threshold, wherein a value of the edge preservation threshold at each image voxel depends on a noise metric in a local neighborhood of the image voxel;

wherein the noise metric in the local neighborhood of the image voxel comprises an aggregation of the intensities of neighborhood image voxels of the reconstructed image in the local neighborhood of the image voxel; and
wherein the spatially varying edge preservation threshold is set to a value providing no edge preservation when the aggregation of the intensities of the neighborhood image voxels of the reconstructed image in the local neighborhood of the image voxel is less than a threshold.