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Two-dimensional Ultrasound Detection with Unfocused Frequency-randomized Signals
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Institution: |
Department of Radiology, Harvard Medical School, Brigham and Women's Hospital, Boston, MA, USA. |
Publisher: |
J Acoust Soc Am |
Publication Date: |
Jan-2007 |
Volume Number: |
121 |
Issue Number: |
1 |
Pages: |
636-647 |
Citation: |
J Acoust Soc Am. 2007 Jan;121(1):636-47. |
PubMed ID: |
17297817 |
PMCID: |
PMC1839069 |
Appears in Collections: |
FUS, NCIGT |
Sponsors: |
NIH R21 EB004353 NIH U41 RR019703 |
Generated Citation: |
Clement G.T. Two-dimensional Ultrasound Detection with Unfocused Frequency-randomized Signals. J Acoust Soc Am. 2007 Jan;121(1):636-47. PMID: 17297817. PMCID: PMC1839069. |
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| Paper: | Download, View online |
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A method is described for detecting scattering in two-dimensions using an unfocused ultrasound field created from a continuously driven source array. The frequency of each element on the array is unique, resulting in a field that is highly variant as a function of both time and position. The scattered signal is then received by a single receiving line. The method, as currently written, is valid under the first order Born approximation. To demonstrate the approach, a series of simulations within the frequency range of 0.10-1.25 MHz are performed and compared with a simulated B-Scan in the same frequency range. The method is found to be superior in resolving closely spaced objects, discerning 1.4 mm separation in the radial and 0.5-mm separation in the axial direction. The method was also better able to determine object size, resolving scatters less than 10% of wavelength associated with the center frequency.
Additional Material
1 File (118.986kB)
Clement-JASA2007-fig2.jpg (118.986kB)