A comparison of two methods for measuring the signal to noise ratio on MR images

  • Firbank M
  • Coulthard A
  • Harrison R
 et al. 
  • 84


    Mendeley users who have this article in their library.
  • 161


    Citations of this article.


The signal to noise ratio (SNR) is one of the important measures of the performance of a magnetic resonance imaging (MRI) system. The object of this study was to compare a single acquisition method, which estimates the noise from background pixels, with a dual acquisition method which estimates the noise from the subtraction of two sequentially acquired images. The dual acquisition method is more exact, but is slower to perform and requires image manipulation. A comparison between the two methods gave a good correlation, and a regression equation of SNRsingle = 1.1 + 0.94 SNRdual. The single acquisition method is therefore appropriate for use in a quality assurance programme, since it is quicker and simpler to perform and is a good indicator of the more exact measure.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text


  • M. J. Firbank

  • A. Coulthard

  • R. M. Harrison

  • E. D. Williams

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free