Power deposition in whole�body NMR imaging

Paul A. Bottomley, William A. Edelstein

Research output: Contribution to journalLetterpeer-review

Abstract

The surface radio frequency (rf) power absorption in human head and torso nuclear magnetic resonance (NMR) imaging experiments is estimated. The results are expressed as a function of the NMR frequency, the rf pulse length, and the pulse duty cycle, which are varied over six orders of magnitude for general applicability. The results are compared with average metabolic levels and the limits advised by the National Radiological Protection Broad of the United Kingdom. Heating due to time�dependent magnetic field gradients is discussed.

Original languageEnglish (US)
Pages (from-to)510-512
Number of pages3
JournalMedical physics
Volume8
Issue number4
DOIs
StatePublished - Jul 1981
Externally publishedYes

Keywords

  • ANIMAL CELLS
  • HEATING
  • IMAGES
  • MAGNETIC FIELDS
  • NUCLEAR MAGNETIC RESONANCE
  • POWER
  • RADIATION PROTECTION
  • RF SYSTEMS

ASJC Scopus subject areas

  • Biophysics
  • Radiology Nuclear Medicine and imaging

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