Performance of sparse-view CT reconstruction with multi-directional gradient operators
Fig 9
The zoom-in views of the images displayed in previous one figure.
First row: ground truth; subsequent rows from top to bottom: images reconstructed using FDK, ART, and the 3-, 6-, and 26-directional gradient operators. Subsequent rows from top to bottom, the more number of directions in gradient operators, the less streak artifacts the reconstructed images have.