Title :
The information content of MR images
Author_Institution :
Philips Med. Syst., Best, Netherlands
fDate :
12/1/1988 12:00:00 AM
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;
Journal_Title :
Medical Imaging, IEEE Transactions on
