Ultrasound Detection of Scatterer Concentration by Weighted Entropy
Ultrasound backscattering signals depend on the microstructures of tissues. Some studies have applied Shannon entropy to analyze the uncertainty of raw radiofrequency (RF) data. However, we found that the sensitivity of entropy in detecting various scatterer concentrations is limited; thus, we propo...
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| Format: | Article |
| Language: | English |
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MDPI AG
2015-09-01
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| Series: | Entropy |
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| Online Access: | http://www.mdpi.com/1099-4300/17/10/6598 |
| _version_ | 1798042875321122816 |
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| author | Po-Hsiang Tsui |
| author_facet | Po-Hsiang Tsui |
| author_sort | Po-Hsiang Tsui |
| collection | DOAJ |
| description | Ultrasound backscattering signals depend on the microstructures of tissues. Some studies have applied Shannon entropy to analyze the uncertainty of raw radiofrequency (RF) data. However, we found that the sensitivity of entropy in detecting various scatterer concentrations is limited; thus, we propose a weighted entropy as a new information entropy-based approach to enhance the performance of scatterer characterization. A standard simulation model of ultrasound backscattering was used to generate backscattered RF signals with different number densities of scatterers. The RF signals were used to estimate the weighted entropy according to the proposed algorithmic scheme. The weighted entropy increased from 0.08 to 0.23 (representing a dynamic range of 0.15) when the number density of scatterers increased from 2 to 32 scatterers/mm2. In the same range of scatterer concentration, the conventional entropy increased from 0.16 to 0.19 (a dynamic range of 0.03). The results indicated that the weighted entropy enables achieving a more sensitive detection of the variation of scatterer concentrations by ultrasound. |
| first_indexed | 2024-04-11T22:42:42Z |
| format | Article |
| id | doaj.art-9a44de4ef6394889b7471216c835483c |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-11T22:42:42Z |
| publishDate | 2015-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-9a44de4ef6394889b7471216c835483c2022-12-22T03:58:57ZengMDPI AGEntropy1099-43002015-09-0117106598661610.3390/e17106598e17106598Ultrasound Detection of Scatterer Concentration by Weighted EntropyPo-Hsiang Tsui0Department of Medical Imaging and Radiological Sciences, College of Medicine, Chang Gung University, Taoyuan 33302, TaiwanUltrasound backscattering signals depend on the microstructures of tissues. Some studies have applied Shannon entropy to analyze the uncertainty of raw radiofrequency (RF) data. However, we found that the sensitivity of entropy in detecting various scatterer concentrations is limited; thus, we propose a weighted entropy as a new information entropy-based approach to enhance the performance of scatterer characterization. A standard simulation model of ultrasound backscattering was used to generate backscattered RF signals with different number densities of scatterers. The RF signals were used to estimate the weighted entropy according to the proposed algorithmic scheme. The weighted entropy increased from 0.08 to 0.23 (representing a dynamic range of 0.15) when the number density of scatterers increased from 2 to 32 scatterers/mm2. In the same range of scatterer concentration, the conventional entropy increased from 0.16 to 0.19 (a dynamic range of 0.03). The results indicated that the weighted entropy enables achieving a more sensitive detection of the variation of scatterer concentrations by ultrasound.http://www.mdpi.com/1099-4300/17/10/6598information entropyweighted entropyultrasound |
| spellingShingle | Po-Hsiang Tsui Ultrasound Detection of Scatterer Concentration by Weighted Entropy Entropy information entropy weighted entropy ultrasound |
| title | Ultrasound Detection of Scatterer Concentration by Weighted Entropy |
| title_full | Ultrasound Detection of Scatterer Concentration by Weighted Entropy |
| title_fullStr | Ultrasound Detection of Scatterer Concentration by Weighted Entropy |
| title_full_unstemmed | Ultrasound Detection of Scatterer Concentration by Weighted Entropy |
| title_short | Ultrasound Detection of Scatterer Concentration by Weighted Entropy |
| title_sort | ultrasound detection of scatterer concentration by weighted entropy |
| topic | information entropy weighted entropy ultrasound |
| url | http://www.mdpi.com/1099-4300/17/10/6598 |
| work_keys_str_mv | AT pohsiangtsui ultrasounddetectionofscattererconcentrationbyweightedentropy |