Adaptive averaging for improved SNR in real-time coronary artery MRI

IEEE Transactions on Medical Imaging
Marshall S SussmanGraham A Wright

Abstract

A technique has been developed for combining a series of low signal-to-noise ratio (SNR) real-time magnetic resonance (MR) images to produce composite images with high SNR and minimal artifact in the presence of motion. The main challenge is identifying a set of real-time images with sufficiently small systematic differences to avoid introducing significant artifact into the composite image. To accomplish this task, one must: 1) identify images identical within the limits of noise; 2) detect systematic errors within such images with sufficient sensitivity. These steps are achieved by evaluating the correlation coefficient (CC) between regions in prospective images and a template containing the anatomy of interest. Images identical within noise are selected by comparing the measured CC values to the theoretical distribution expected due to noise. Sensitivity for systematic error depends on the SNR of the CC (=SNR(CCmax)), which in turn depends on the noise, and the template size and structure. By varying the template size, SNR(CCmax) may be altered. Experiments on phantoms and coronary artery images demonstrate that the SNR(CCmax) necessary to avoid introducing significant artifact varies with the target composite SNR. The futur...Continue Reading

References

Jan 1, 1990·Magnetic Resonance Imaging·R S Owen, F W Wehrli
Nov 1, 1986·Medical Physics·M L Wood, R M Henkelman
Sep 1, 1995·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·T S SachsA Macovski
Nov 5, 1997·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·D K Sodickson, W J Manning
Oct 27, 1997·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·A B KerrD G Nishimura
Dec 7, 2000·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·C J HardyR D Darrow
Sep 11, 2001·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·K S NayakD G Nishimura
Oct 25, 2001·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·R M BotnarW J Manning
Jul 12, 2002·Journal of Magnetic Resonance Imaging : JMRI·Dirk MankeOlaf Dössel
Nov 6, 2002·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Marshall S SussmanGraham A Wright

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Citations

Dec 2, 2009·Pediatric Radiology·Andrea S DoriaMarshall S Sussman
Jul 21, 2005·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Xiaoming BiDebiao Li
Aug 30, 2008·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Angela O LeungRichard B Thompson

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