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Paper Abstract and Keywords
Presentation 2017-04-27 10:55
Experimental evaluation of spatial resolution in low-frequency parametric ultrasound image
Hideyuki Nomura (UEC)
Abstract (in Japanese) (See Japanese page) 
(in English) The penetration depth of high-frequency ultrasound is limited since the ultrasound at high frequency is much attenuated by medium viscosity, therefore, the available depth of high-frequency ultrasound image becomes shallow. We have proposed low-frequency ultrasound imaging using low-frequency parametric ultrasound applied by pulse compression to resolve this problem. In this study, in order to evaluate the range resolution of the proposed method, imaging for brass rods straightly aligned with different distances using the low-frequency parametric ultrasonic was attempted. An image obtained by the low-frequency parametric sound with a chirp bandwidth of 100-500 kHz applied by pulse compression indicated the separation of the most closed brass rods with the distance of 1 mm, and this resolution agrees well with the theoretical value. In addition, the comparison with the image obtained by high-frequency ultrasound showed the image of rod behind overlapped rods. This result suggests the benefit of the proposed method.
Keyword (in Japanese) (See Japanese page) 
(in English) Acoustic imaging / Low-frequency ultrasound / Parametric sound source / Pulse compression / Range resolution / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 14, US2017-2, pp. 5-10, April 2017.
Paper # US2017-2 
Date of Issue 2017-04-20 (US) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee US  
Conference Date 2017-04-27 - 2017-04-27 
Place (in Japanese) (See Japanese page) 
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Paper Information
Registration To US 
Conference Code 2017-04-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Experimental evaluation of spatial resolution in low-frequency parametric ultrasound image 
Sub Title (in English)  
Keyword(1) Acoustic imaging  
Keyword(2) Low-frequency ultrasound  
Keyword(3) Parametric sound source  
Keyword(4) Pulse compression  
Keyword(5) Range resolution  
1st Author's Name Hideyuki Nomura  
1st Author's Affiliation The University of Electro-Communications (UEC)
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Date Time 2017-04-27 10:55:00 
Presentation Time 25 
Registration for US 
Paper # IEICE-US2017-2 
Volume (vol) IEICE-117 
Number (no) no.14 
Page pp.5-10 
#Pages IEICE-6 
Date of Issue IEICE-US-2017-04-20 

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