Search results for " rf inhomogeneity"

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Illumination Correction on MR Images

2006

Objective. An important artifact corrupting Magnetic Resonance Images is the rf inhomogeneity, also called bias artifact. This anomaly produces an abnormal illumination fluctuation on the image, due to variations of the device magnetic field. This artifact is particularly strong on images acquired with a device specialized on upper and lower limbs due to their coil configuration. A method based on homomorphic filtering aimed to suppress this artifact was proposed by Guillemaud. This filter has two faults: it doesnt provide an indication about the cutoff frequency (cf) and introduces another illumination artifact on the edges of the foreground. This work is an improvement to this method because i…

Artifact (error)Computer sciencebusiness.industryComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONHealth InformaticsFilter (signal processing)Critical Care and Intensive Care MedicineMagnetic Resonance ImagingCutoff frequencyMagnetic fieldAnesthesiology and Pain MedicineHomomorphic filteringBiasElectromagnetic coilIntensive careMagnetic Resonance Image MRI bias artifact illumination rf inhomogeneity homomorphic filter.Image Processing Computer-AssistedHumansKneeComputer visionArtificial intelligenceAnomaly (physics)businessAlgorithmsJournal of Clinical Monitoring and Computing
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