20. Bioimaging

Frontiers of Biomedical Engineering (BENG 100) Professor Saltzman first reviews the electromagnetic spectrum, the different regimes of the spectrum, their respective wavelengths, energies, and ways of detecting them. He then talks about the use of high energy radio waves for imaging of the body. The history, components, advantages and limitations of X-ray imaging are presented in detail. Next, he introduces Computed Tomography, a related imaging technique which uses mathematical computation to compile line-scanned X-rays into a three dimensional image. Finally, Professor Saltzman touches on harmful effects of X-ray radiation, and ways to limit or avoid overexposure in these imaging techniques. 00:00 - Chapter 1. Introduction to Biomedical Imaging 05:26 - Chapter 2. The Electromagnetic Spectrum 13:29 - Chapter 3. X-Rays 24:39 - Chapter 4. Challenges of X-Ray Imaging 30:41 - Chapter 5. CT Imagery 37:02 - Chapter 6. Conclusion Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses This course was recorded in Spring 2008.