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231223s2009 xx |||||o 00| ||eng c |
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|a 10.1109/TUFFC.2009.1189
|2 doi
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|a pubmed25n0633.xml
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|a (DE-627)NLM189733489
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|a (NLM)19574144
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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1 |
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|a Sanchez, Jose R
|e verfasserin
|4 aut
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|a An ultrasonic imaging speckle-suppression and contrast-enhancement technique by means of frequency compounding and coded excitation
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|c 2009
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 22.10.2009
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|a Date Revised 03.07.2009
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|a published: Print
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|a Citation Status MEDLINE
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|a A method for improving the contrast resolution of B-mode images is proposed by combining the speckle-reduction technique of frequency compounding (FC) and the coded excitation and pulse-compression technique called resolution enhancement compression (REC). FC suppresses speckle but at the expense of a reduction in axial resolution. Using REC, the axial resolution and bandwidth of the imaging system was doubled. Therefore, by combining REC with FC (REC-FC), the tradeoff between axial resolution and contrast enhancement was extended significantly. Simulations and experimental measurements were conducted with a single-element transducer (f/2.66) having a center frequency of 2.25 MHz and a -3-dB bandwidth of 50%. Simulations and measurements of hyperechoic (+6 dB) tissue-mimicking targets were imaged. Four FC cases were evaluated: full-, half-, third-, and fourth-width of the true impulse response bandwidth. The image quality metrics used to compare REC-FC to conventional pulsing (CP) and CP-FC were contrast-to-noise ratio (CNR), speckle signal-to-noise ratio, histogram pixel intensity, and lesion signal-to-noise ratio. Increases in CNR of 121%, 231%, 302%, and 391% were obtained in experiments when comparing REC-FC for the full-, half-, third-, and fourth-width cases to CP. Furthermore, smaller increases in CNR of 112%, 233%, and 309% were obtained in experiments when comparing CP-FC for the half-, third-, and fourth-width cases to CP. Improved lesion detectability was observed by using REC-FC
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|a Journal Article
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|a Research Support, N.I.H., Extramural
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| 700 |
1 |
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|a Oelze, Michael L
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t IEEE transactions on ultrasonics, ferroelectrics, and frequency control
|d 1986
|g 56(2009), 7 vom: 15. Juli, Seite 1327-39
|w (DE-627)NLM098181017
|x 1525-8955
|7 nnas
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| 773 |
1 |
8 |
|g volume:56
|g year:2009
|g number:7
|g day:15
|g month:07
|g pages:1327-39
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| 856 |
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|u http://dx.doi.org/10.1109/TUFFC.2009.1189
|3 Volltext
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|d 56
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|h 1327-39
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