INFLUENCE OF FILTRATION OF PHASE-FREQUENCY SPACE ON TOMOGRAMS QUALITY
Kaznacheeva Anna Olegovna
Scientific-Medical Centre "Tomography" in Saint Petersburg
Abstract. The article describes the phase-frequency distribution of signals in the process of creating images in magnetic resonance tomography, the kinds of frequency filtration, influence on the image characteristics. The author analyzes a method of reducing noise and test time on the basis of the low-frequency filtration of k -space. The evaluation of the images quality (saving of the images details) is conducted for the experimental and reference tomograms of the phantom aimed at changing the intensity of the signal. The paper also determines the degree of filling k -space that enables to save the time of testing without deteriorating the resolution and quality of the tomograms.
Key words and phrases: томография, обработка изображений, частотная фильтрация, шум, разрешение, tomography, images processing, frequency filtration, noise, resolution
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