1. Dr. Engr. Sami ur Rahman Assistant Professor Department of Computer Science University of Malakand Medical Imaging Principle of 3D Image acquisition

2. X-Rays Imaging First Medical Image Image Courtesy: University of Freiburg, Germany  Most common medical imaging modality  Uses high energy radiation that penetrates through skin and tissue but not through bones. This produces a radiograph (2D X-rays image)  Areas like bone that absorb more radiation appear whiter while areas that the radiation passes through appear dark https://docs.google.com/a/uom.edu.pk/presentation/d/1sd8Qqro2 ESxD-yueHtPG0AcpWYSRX6EcAhVgriEcOHY/edit#slide=id.p8 Wilhem Rotengen University Of Malakand | Department of Computer Science | Visual Computing Research Group | Dr. Engr.Sami ur Rahman | 2

3. Computed Tomography (CT Scan) Also known as Computer Assisted Tomography scans (CAT scans) Uses x-ray equipment to produce 3D images by taking a series of pictures from different angles http://12000.org University Of Malakand | Department of Computer Science | Visual Computing Research Group | Dr. Engr.Sami ur Rahman | 3

4. CT principle University Of Malakand | Department of Computer Science | Visual Computing Research Group | Dr. Engr.Sami ur Rahman | 4 Representation by a grid

5. X-Rays from first view University Of Malakand | Department of Computer Science | Visual Computing Research Group | Dr. Engr.Sami ur Rahman | 5 255 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 X-Rays source X-Rays detector

6. X-Rays from second view University Of Malakand | Department of Computer Science | Visual Computing Research Group | Dr. Engr.Sami ur Rahman | 6 X-Rays source X-Rays detector 255 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

7. X-Rays from second view University Of Malakand | Department of Computer Science | Visual Computing Research Group | Dr. Engr.Sami ur Rahman | 7 255 0 0 0 0 0 X-Rays source X-Rays detector

8. Assignment University Of Malakand | Department of Computer Science | Visual Computing Research Group | Dr. Engr.Sami ur Rahman | 8 Explain how different body organs are imaged using CT scan? Hard tissues Bones Soft tissues

9. End

10. Image Reconstruction  Hints for assignment