Development of elastography as a non-invasive method for hard spots detection of packaged beef rations /
A system of finite element modeling combined with graphics.
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1998.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | A system of finite element modeling combined with graphics. affecting the individual detection of hard spots when algorithms were also developed in this study. They automatic thresholding algorithm and the results were conditions. The elastograms were segmented using an cross-correlation techniques on congruent compression detection of hard spots for elastography. The larger detection. In order for spots to be detected, they detection. The orthotropic model described the determine the optimal elastography conditions for differences among three models for hard spots elastogram generation was used to study the detection elastogram. Three automatic thresholding segmentation elastograms with different sizes and ratios of moduli halogenous model, non-homogenous model and orthotropic Interference between hard spots may cause noise in model were established for beef steaks and the more than one hard spot existed in the sample. must have at least 4 mm of diameter with 5.0 modulus of 35 MHz, a signal-to-noise ratio of 10, and a of elasticity (modulus ratios) of hard spots to of hard spot versus background, and relative of hard spots in beef rations. Finite element was used of the elastogram, and the magnitude of gradient of packaged beef rations. Three different models, positions of hard spots are factors affecting the ratio or 2.5 modulus ratio with 6 mm of diameter. The ratio, the smaller the relative error of the hard spot relative positions of hard spots also was a factor RF echo sequences. The system was first used to segments of pro- and post-detection of hard spots in selected the threshold value for segmentation based on smallest detected error for hard spot detection among structure of beef steaks most precisely and had the surrounding tissue were generated under the selected the contour lines, the local minima of the histogram the Image. The optimal conditions determined for elastography the size of hard spot, or the higher the modulus the three models. Sizes of hard spot, modulus ratios to model the structural deformation of beef steaks transducer frequency of 5 MHz. There were significant under compression while elastogram was generated using used to analyze the detection of hard spots. were an applied strain of 1.0%, a sampling frequency |
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| Item Description: | "Major subject: Agricultural Engineering". Vita. |
| Physical Description: | xi, 152 leaves : illustrations ; 28 cm. Also available online. |
| Bibliography: | Includes bibliographical references: 98-105. |