What happened to antimatter? - Rolf Landua
Particles come in pairs, which is why there should be an equal amount of matter and antimatter in the universe. Yet, scientists have not been able to detect any in the visible universe. Where is this missing antimatter? CERN scientist Rolf Landua returns to the seconds after the Big Bang to explain the disparity that allows humans to exist today.
Here's a general introduction to many different aspects of antimatter: what it is, where it is made, and how it's already a part of our lives.
This is a good overview article with more in-depth information about antimatter. It's from Scientific American.
Here's a link to more information about all the antimatter research at CERN.
The TED-Ed blog outlines the collaboration with CERN.
Michael Doser gives a talk at TEDxGeneva called The Return of Antimatter.
Positron emission tomography (PET) is a nuclearmedical imaging technique that produces a three-dimensional image or picture of functional processes in the body. The system detects pairs ofgamma rays emitted indirectly by a positron-emitting radionuclide (tracer), which is introduced into the body on a biologically active molecule. Three-dimensional images of tracer concentration within the body are then constructed by computer analysis. In modern scanners, three dimensional imaging is often accomplished with the aid of a CT X-ray scan performed on the patient during the same session, in the same machine.