| 摘要 |
In order to minimize streak artifacts within reconstructions of perfusion maps generated from moving C-arm acquisitions, a streak reduction method includes threshold analysis, time-contrast curve analysis, and total variation analysis. One or more mask volumes and a plurality of contrast agent enhanced volumes are generated based on a plurality of projections generated using a moving C-arm X-ray device. A maximum contrast attenuation volume is generated based on the plurality of contrast agent enhanced volumes. Voxels are identified as streaks based on analyses applied to the one or more mask volumes, the plurality of contrast agent enhanced volumes, and the maximum contrast attenuation volume, respectively. |
| 主权项 |
1. A method for artifact removal within image data, the method comprising:
identifying, by a processor, a first three dimensional (3D) dataset, the first 3D dataset comprising image data representing an object without a contrast agent; identifying, by the processor, a plurality of second 3D datasets, each second 3D dataset of the plurality of second 3D datasets comprising a plurality of voxels representing the object with the contrast agent; generating, by the processor, a third 3D dataset based on the plurality of second 3D datasets; segmenting, by the processor, a subset of data from the first 3D dataset, the segmented subset of data corresponding to a subset of voxels of the plurality of voxels; generating, by the processor, time attenuation curves (TACs) based on the plurality of second 3D datasets; identifying, by the processor, one or more artifacts within the third 3D dataset based on one or more thresholds and the generated TACs for voxels corresponding to locations of voxels of the subset; and removing, by the processor, the one or more identified artifacts from the third 3D dataset. |
