Slide 8 of 13
Notes:
- Spatial Resolution is determined by taking the 2DFT of the point spread using pixel data around the Tungsten wire
- and calculating the 50% and 10% MTF values
- The image to the left shows an image of the wire insert reconstructed using a standard resolution algorithm
- This graph shows the mesh surface of the CT Numbers of the insert.
- The second image shows an image of the wire insert reconstructed using a high resolution algorithm
- This graph shows the mesh surface of the insert in the second image.
The strong contrast between the wire and the insert results in flattening of the graph at the top. This appeared when using one sharp reconstruction algorithm from one manufacturer. We are currently investigating the possibility of using other less attenuating materials