Search Engines & Resources for Medical Transcription
MT911 - Your Transcription Helpline Search Engines & Resources for Medical Transcription
Subscribe to
Email Updates
Name:
Email:
Search:
|

MRI Related Terms

- N -

  • NET MAGNETIZATION VECTOR

  • A vector which represents the sum of all of the contributions of the magnetic moments within the magnetic field; the magnitude and direction of the magnetization resulting from this collection of atomic nuclei.

  • NEUTRON

  • An uncharged neutral particle located in the nucleus of most atoms which serves as a stabilizer.

  • NEX

  • Number of excitations. See also Number of Excitations, Signal Averaging.

  • NMR SIGNAL

  • The electromagnetic signal in the radio-frequency range produced by the precession of the transverse magnetization of the spins. The rotation of the transverse magnetization induces a voltage in a receiving antenna (coil) which is amplified and demodulated by the receiver circuits.

  • NOISE

  • An undesirable background interference or disturbance that affects image quality. NSA - the number of signal averages performed during the scan. See also NEX and Signal Averaging.

  • NUCLEAR SPIN

  • Also known as inherent spin, this defines the intrinsic property of certain nuclei (those with odd numbers of protons and/or neutrons in their nucleus) to exhibit angular momentum and a magnetic moment. Nuclei that do not exhibit this characteristic will not produce an NMR signal.

  • NUCLEUS

  • The core or center part of an atom, which contains protons having a positive charge and neutrons having no electrical charge, except in the common isotope of hydrogen, where the nucleus is a single proton.

  • NUMBER OF EXCITATIONS

  • An indicator of how many times each line of k-space data is acquired during the scan.


Tell a Friend

MRI Terms


Home | Search | Sitemap | Tell a Friend | Contact Us | Disclaimer
MTHelpLine | MTSetup | MTDictionary | MTSamples | MedicalTranscriptionSamples
Designed for IE.
Best viewed in 1024 x 768