MEDRADSC 3DE3 Lecture Notes - Lecture 3: Active Galactic Nucleus, Loss Given Default, Spin Echo

• School: McMaster University
• Department: Medical Radiation Sciences
• Course: MEDRADSC 3DE3
• Professor: Alana Trainor

Document Summary

Found in zone 4 (mri suite or magnet room) Defines a perimeter/border specific to the magnet - depends on strength of magnet how close the line is. At the line, inside the line that anything that is metal & implanted can be affected by the magnet. Anything outside the 5 gauss is considered safe. Derived from sir isaac newton - newtonian theory . Uses concepts of mass, spin, and angular moment on a large/bulk scale. Molecules are made up of 2 or more atoms. Most abundant atom is hydrogen - m. c. found in water & fat. Atom consists of a central nucleus & orbiting electrons. Nucleus contains nucleons, which are then subdivided into protons & neutrons. Atomic number = sum of protons & neutrons in nucleus; and mass number = sum of protons & electrons in the nucleus. Atom = electrical stable if electrons = protons. Unstable due to deficit or excess # of electrons are called ions.