Explain the basic principles of MR image production Essay - 2

Explain the basic principles of MR image production - Essay ExampleMRI is the safest imaginativeness clinical imaging technique that is used for a variety of medical purposes like differentiating between formula and pathological tissues for diagnosis and tracking dynamic repositions in tissue properties over time.Magnetism is physical phenomenon in which materials and moving supercharged particles can attract or repel other materials or moving charged particles (Ballinger, Intro to MRI, 1998). Magnetism results from moving electric charges or intrinsic keel moments of electrons or nucleis. Spin is a quantum mechanical property. This means that the available spin energy levels are constrained to specific, discrete values. A spin 1/2 particle has only two possible spin enounces spin up (+ 1/2) or spin down (- 1/2). The magnetised moment is aligned with the spin. The spin-up and spin-down states are described as being equal in energy, or degenerate. However, if another magnetic fi eld is introduced, the spin-up and spin-down states will be no longer equal in energy. The energy difference introduced by applying the external magnetic field is know as the Zeeman splitting (van Geuns, 1999). This effect is very important in such applications as magnetic vibrancy imaging. Magnetism can be classified as paramagnetism, diamagnetism, ferromagnetism, and antiferromagnetism (Ballinger, Intro to MRI, 1998).Having microscopic magnetization, protons within a magnetic field produce wobbling as they spin. The rate of this wobbling or precession constitutes resonance or Larmor frequency (Intro to MRI). The application of a radio frequency pulse at the Larmor frequency causes a change in the distribution of spins with respect to their energy state and precessional phase coherence (Rodrguez, 2003). Practically, it means that If individual nuclei is undefended to RF radiation at the Larmor frequency, nuclei in the lower energy state jumps to the higher energy state (Intro to M RI). Upon