1. Filtering
Removing components from an image is know as “image filtering”.
If we remove the high frequency components, we tend to remove the noise.
This smooths the image.

2. Image Filtering

3. Original Image

4. Filtered, or Smoothed Image

6. Time of Flight Systems

7. Lines of Response Revisited. Coordinate localization (Forming the LOR)
Image formation In PET
Lines of Response Revisited.
Timing Window
Coordinate localization (Forming the LOR)
Sinogram
Image Reconstruction

8. Image Reconstruction Direct Image Reconstruction BackProjection
Algebraic Reconstruction

9. Time of Flight Systems Direct Image Reconstruction

10. Backprojection

12. Iterative “Algabraic” Reconstruction

13. Pixel Weighting Factors