Work

Noise and filtration in magnetic resonance imaging

Year: 1985

Type: article

Abstract: Noise in two-dimensional Fourier transform magnetic resonance images has been investigated using noise power spectra and measurements of standard deviation. The measured effects of averaging, spatial filtering, temporal filtering, and sampling have been compared with theoretical calculations. The noise of unfiltered images is found to be white, as expected, and the choice of the temporal filter and sampling interval affects the noise in a manner predicted by sampling theory. The shapes of the imager's spatial frequency filters are extracted using noise power spectra.

Source: Medical Physics

DOI: 10.1118/1.595679

Authors: E. R. McVeigh, R. M. Henkelman, M. J. Bronskill

Institution: University of Toronto

Language: English

Topic: Advanced MRI Techniques and Applications

Subfield: Radiology, Nuclear Medicine and Imaging

Field: Medicine

Domain: Health Sciences

Open Access status: green

Funders: National Institutes of Health, National Heart, Lung, and Blood Institute

Award: Ultra-fast MRI For Cardiovascular Applications