X-ray, CT scans, and voxels are medical imaging techniques. X-rays use radiation to pass through objects, revealing internal structures. CT scans take multiple X-ray images from different angles and use computer processing to reconstruct voxels, or 3D pixels, creating a cross-sectional view inside the body. Voxels are volume elements that make up a 3D image. CT scans allow doctors to non-invasively see inside tissues and organs to diagnose and monitor medical conditions.
9. Principles One area must have a difference in density. Computers can collect the information(density) to create a 3-D picture Pixel is a unit that tell you how much its dots per inch Target material
16. Divide by 3 17 3 Deduct 14 26 12 1 4 20 35 6 21 2 7 Reconstruction of each pixel require millions of computations 7 4 = 14 + + 3 The 3-D image can be constructed through storing all the reconstructed pixel on the memory. Background Radiation
17. Comparison Old technologies X-ray film transparency Ultrasound Its application CT scan Used in medical work Used in the airport (destructive objects)
21. Reference A Level Science Applications Support Booklet: Physics (University of Cambridge) http://www.nlm.nih.gov/medlineplus/ency/article/003330.htm http://www.radiologyinfo.org/en/info.cfm?PG=bodyct http://www.emedicinehealth.com/ct_scan/article_em.htm
22. Task Rishab Reconstruction of Voxel Slide preparation Watsuwach Principles of X-ray Applications and comparisons Ultrasound