Enhancement of elasticity images using locally adaptive Gaussian filtering

Kenneth Hoyt; Kevin J. Parker

doi:10.1117/12.709446

12 March 2007 Enhancement of elasticity images using locally adaptive Gaussian filtering

Kenneth Hoyt, Kevin J. Parker

Proceedings Volume 6513, Medical Imaging 2007: Ultrasonic Imaging and Signal Processing; 65131F (2007) https://doi.org/10.1117/12.709446
Event: Medical Imaging, 2007, San Diego, CA, United States

Abstract

The purpose of this research was to introduce and analyze a technique for enhancing elasticity image quality using locally adaptive Gaussian filtering. To assess the performance of this filtering method for reconstructing images with missing or degraded data, heterogeneous images were simulated with circular regions of intensity twice that of the surrounding material. Missing pixel data was introduced by thresholding a uniformly distributed noise matrix. Results demonstrate locally adaptive Gaussian filtering accurately reconstructs the original image while preserving boundary detail. To further analyze the performance of this filtering technique, multiple local image regions were suppressed and normally distributed noise superimposed. Consequently, locally adaptive Gaussian filtering is capable of reconstructing local missing data whereas both median and conventional Gaussian filtering fails. Using compressional elastographic experimental data, results illustrate that locally adaptive Gaussian filtering is capable of minimizing decorrelation noise artifacts while preserving lesion boundaries. Additionally, results obtained using vibrational shear velocity sonoelastography further illustrate the ability of locally adaptive Gaussian filtering to enhance image quality by minimizing estimator noise degradation in comparison to conventional spatial filtering techniques. Overall, results indicate the feasibility of employing this spatial filtering technique for improving elasticity image quality while preserving lesion boundaries.

Citation Download Citation

Kenneth Hoyt and Kevin J. Parker "Enhancement of elasticity images using locally adaptive Gaussian filtering", Proc. SPIE 6513, Medical Imaging 2007: Ultrasonic Imaging and Signal Processing, 65131F (12 March 2007); https://doi.org/10.1117/12.709446

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KEYWORDS

Digital filtering

Image filtering

Gaussian filters

Tissues

Image enhancement

Image quality

Filtering (signal processing)

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