The information content of MR images

Author

Fuderer, Miha

Author_Institution

Philips Med. Syst., Best, Netherlands

Volume

7

Issue

4

fYear

1988

fDate

12/1/1988 12:00:00 AM

Firstpage

368

Lastpage

380

Abstract

The theoretical information content, defined by C.E. Shannon (1948), is proposed as an objective measure of MR (magnetic resonance) image quality. This measure takes into account the contrast-to-noise ratio (CNR), scan resolution, and field of view. It is used to derive an optimum in the tradeoff problem between image resolution and CNR, and as a criterion to assess the usefulness of high-resolution (512²) MR images. The result tells that for a given total acquisition time, an optimum value of the resolution can be found. This optimum is very broad. To apply Shannon´s theory on information constant to MR images, a model for the spatial spectral power density of these images is required. Such a model has been derived from experimental observations of ordinary MR images, as well as from theoretical considerations

Keywords

biomedical NMR; patient diagnosis; NMR images information content; contrast-to-noise ratio; field of view; image quality; image resolution; medical diagnostic imaging; scan resolution; spatial spectral power density; Humans; Image quality; Image resolution; Particle measurements; Pixel; Power system modeling; Shape measurement; Signal detection; Signal resolution; Signal to noise ratio;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/42.14521

Filename

14521