Comprehensive backscattering characteristics analysis for quantitative ultrasound with an annular array: a basic study on homogeneous scattering phantom

Mizoguchi, Takeru; Tamura, Kazuki; Mamou, Jonathan; Ketterling, Jeffrey A.; Yoshida, Kenji; Yamaguchi, Tadashi

doi:10.7567/1347-4065/ab0df9

Cited by 13 publications

(18 citation statements)

References 45 publications

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“…The acoustic specifications of the annular array can be found elsewhere. 35) 2.2. Amplitude envelope statistics 2.2.1.…”

Section: Annular Array and Focusing Strategymentioning

confidence: 99%

“…The RF echo data sets of the 25 transmit-receive ring pairs were acquired by scanning the annular array using our self-made ultrasound scanner (see Fig. 5 in a previous report 35) ).…”

Section: Data Acquisition and Analysismentioning

confidence: 99%

“…When we used an acrylic planer as a Ref. 35 the estimation accuracy for the BSC sometimes decreased in the case of defocus. This was caused by the directivity of the annular array elements; if the phases of the acquired signals are not aligned (e.g.…”

Section: Homogeneous Scattering Phantommentioning

confidence: 99%

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Improved evaluation of backscatter characteristics of soft tissue using high-frequency annular array

Mizoguchi

Yoshida

Mamou

et al. 2020

Jpn. J. Appl. Phys.

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Clinical ultrasound is widely used for quantitative diagnosis. To clarify the relationship between anatomical and acoustic properties, high resolution imaging using high-frequency ultrasound (HFU) is required. However, when tissue properties are evaluated using HFU, the depth of field (DOF) is limited. To overcome this problem, an annular array transducer, which has a simple structure and produces high-quality images, is applied to HFU measurement. In previous phantom experiments, we demonstrated that the HFU annular array extends the DOF compared to that of a single-element transducer for quantitative ultrasound (QUS) analysis. Here, we extend that work by applying QUS methods to an ex vivo rat liver. The present study demonstrates that an annular array extends the region and improves the resolution for tissue characterization for an excised healthy rat liver. Amplitude envelope statistics and spectral-based analysis are used as QUS methods.

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“…The acoustic specifications of the annular array can be found elsewhere. 35) 2.2. Amplitude envelope statistics 2.2.1.…”

Section: Annular Array and Focusing Strategymentioning

confidence: 99%

“…The RF echo data sets of the 25 transmit-receive ring pairs were acquired by scanning the annular array using our self-made ultrasound scanner (see Fig. 5 in a previous report 35) ).…”

Section: Data Acquisition and Analysismentioning

confidence: 99%

See 1 more Smart Citation

Improved evaluation of backscatter characteristics of soft tissue using high-frequency annular array

Mizoguchi

Yoshida

Mamou

et al. 2020

Jpn. J. Appl. Phys.

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“…The extended DOF achieved with the annular arrays was found to improve the estimation accuracy of QUS parameters compared to the fixed-focus case. 35,36) Here, a HFU annular-array transducer was applied to QUS analysis for skin tissues with layered structure. 37) In the BSC analysis, the reference phantom method (RPM) was applied to remove the effect of the ultrasound system.…”

Section: Introductionmentioning

confidence: 99%

Backscatter properties of two-layer phantoms using a high-frequency ultrasound annular array

Saito

Omura

Ketterling

et al. 2022

Jpn. J. Appl. Phys.

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In a previous study, an annular-array transducer was employed to characterize homogeneous scattering phantoms and excised rat livers using backscatter envelope statistics and frequency domain analysis. A sound field correction method was also applied to take into account the average attenuation of the entire scattering medium. Here, we further generalized the evaluation of backscatter coefficient (BSC) using the annular array in order to study skin tissues with a complicated structure. In layered phantoms composed of two types of media with different scattering characteristics, the BSC was evaluated by the usual attenuation correction method which revealed an expected large difference from the predicted BSC. In order to improve the BSC estimate, a correction method that applied the attenuation of each layer as a reference combined with a method that corrects based on the attenuation of the analysis position were applied. It was found that the method using the average attenuation of each layer is the most effective. This correction method is well adapted to the extended depth of field provided by an annular array.

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“…The backscatter grain noise has no requirement of parallel front-wall and back-wall surfaces and known wall thickness of a specimen, but more complicated statistical methods are required to combine the ultrasonic signals from different sets of grains at different transducer spatial positions [ 13 ]. This method loses accuracy in the case of coarse-grained materials.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Grain Size in 316L Stainless Steel Using the Attenuation of Rayleigh Wave Measured by Air-Coupled Transducer

Wang

Dai

et al. 2021

Materials

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Grain size is an important parameter in evaluating the properties of microstructures in metals. In this paper, the attenuation coefficient of Rayleigh waves is introduced to characterize grain size in heat treated 316L stainless steel. Rayleigh wave attenuation is measured using an angle beam wedge transducer as the transmitter and an air-coupled transducer as the receiver. The results show that the grain size in 316L stainless steel increases due to heat treatment time, the hardness decreases accordingly, and the attenuation coefficient of Rayleigh waves increases. This indicates that the Rayleigh wave attenuation is sufficient in distinguishing the changes in the properties of the heat-treated stainless steel. It is found that compared with the measurement method using an angle beam wedge receiver, the measured results are efficient, more stable and less influenced by the surface state when an air-coupled receiver is used. In addition, comparison results also show that the Rayleigh wave attenuation is more sensitive to changes in material properties than the longitudinal wave attenuation, as the wavelength of the Rayleigh wave is shorter than that of the longitudinal wave at the same frequency.

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Comprehensive backscattering characteristics analysis for quantitative ultrasound with an annular array: a basic study on homogeneous scattering phantom

Cited by 13 publications

References 45 publications

Improved evaluation of backscatter characteristics of soft tissue using high-frequency annular array

Improved evaluation of backscatter characteristics of soft tissue using high-frequency annular array

Backscatter properties of two-layer phantoms using a high-frequency ultrasound annular array

Characterization of Grain Size in 316L Stainless Steel Using the Attenuation of Rayleigh Wave Measured by Air-Coupled Transducer

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