2022 IEEE International Ultrasonics Symposium (IUS)最新文献

{"title":"Insonification Angle-based Ultrasound Volume Reconstruction for Spine Intervention","authors":"Baichuan Jiang, Keshuai Xu, A. Moghekar, P. Kazanzides, E. Boctor","doi":"10.1109/IUS54386.2022.9957297","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9957297","url":null,"abstract":"Ultrasound-guided spine interventions, such as lumbar-puncture procedures, often suffer from the reduced visibility of key anatomical features such as the inter-spinous process space, due to the complex shape of the self-shadowing vertebra. Therefore, we propose to design a wearable 3D ultrasound device capable of imaging the vertebra from multiple insonification angles to improve the 3D bone surface visualization for interventional guidance. In this work, we aim to equip the imaging platform with a reconstruction algorithm taking advantage of the redundant ultrasound beam angles. Specifically, we try to weight each beam's contribution for the same reconstructed voxel during the reconstruction process based on its incidence angle to the estimated bone surface. To validate our approach, we acquired multi-angle ultrasound image data on a spine phantom with a tracked phased array transducer. The results show that with the proposed method the bone surface contrast can be significantly enhanced, providing clearer visual guidance for the clinician to perform spine intervention.","PeriodicalId":272387,"journal":{"name":"2022 IEEE International Ultrasonics Symposium (IUS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124241404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthetic Aperture High Quality B-mode Imaging with a Row-Column Array Compared to Linear Array Imaging","authors":"J. Jensen, Mikkel Schou, M. L. Ommen, K. Steenberg, E. Thomsen, B. Tomov, Nathalie Sarup Panduro, Charlotte Mehlin Sørensen, M. Stuart","doi":"10.1109/IUS54386.2022.9957973","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9957973","url":null,"abstract":"Row-column (RC) matrix probes can yield 3-D volumetric imaging using a number of receiving elements similar to traditional linear arrays for commercial scanners. Some doubts have, however, been raised on the B-mode image quality of RC probes. It is hypothesized that synthetic aperture (SA) RC imaging can yield a better volumetric resolution than commercial spatially translated linear arrays, and at the same time attain volume rates similar to frame rates for single slice linear array scanning. A Vermon 6 MHz $128times 128$ elements RC array with $lambda$ pitch was used on a Verasonics Vantage 256 scanner. A SA sequence with $2times 96$ emissions on the rows and columns and reception on all 128 orthogonal elements were employed giving a 62.5 Hz volume rate for a pulse repetition frequency of 12 kHz. The resolution and contrast were compared to an optimized SA sequence for a 256-elements GE L3-12D 6 MHz linear array probe, where the volume was acquired using a linear probe translation in the elevation direction. Imaging was conducted on a 3-D printed point spread function (PSF) phantom with scattering voids in a $6times 4times 4$ grid with a 2.05 mm spacing in all three directions. The exposed kidney of a Sprague-Dawley rat was also scanned in vivo with the RC probe. B-mode images of the 3-D printed PSF phantom were shown with a 40 dB dynamic range along with the linear array scans. An isotropic resolution of $(1.05lambda, 1.10lambda,0.62lambda)=(x, y, z)$ was obtained for the row-column probe. The linear array probe had an elevation resolution determined by the geometric elevation focus of the array, and therefore the four rows of point scatterers could not be differentiated in the elevation direction due to the fixed elevation focus. The data rates were identical for the two arrays, but the RC array yielded an isotropic PSF with an improved contrast, and a 62.5 Hz volume rate comparable to normal linear array imaging. In vivo kidney images for the three orthogonal planes were shown with a 60 dB dynamic range demonstrating the isotropic speckle pattern in all three directions for all depths. The SA imaging RC sequence thus yielded a PSF independent of orientation and depth. Any slice plane in the volume therefore had a uniform speckle pattern, contrast, and resolution, demonstrating that RC arrays can yield higher quality B-mode images than linear arrays. The penetration depth of the probe and sequence was also measured to be $550lambda$ corresponding to 141 mm.","PeriodicalId":272387,"journal":{"name":"2022 IEEE International Ultrasonics Symposium (IUS)","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124329590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of lateral and axial resolution of pixel-based beamformers in photoacoustic tomography using a linear US probe","authors":"I. Pi-Martín, A. Cebrecos, J. J. García-Garrigós, N. Jiménez, F. Camarena","doi":"10.1109/IUS54386.2022.9958843","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9958843","url":null,"abstract":"Many photoacoustic tomography (PAT) systems have been developed using conventional linear ultrasound probes with reduced angular spectra, which limits the resolution of tomographic reconstructions. These limitations are partially compensated by employing advanced reconstruction algorithms that take advantage of the intrinsic characteristics of the photoacoustic signals. The aim of this work is to theoretically, numerically and empirically characterise the lateral and axial resolution using two nearby point objects that are separated until they can be distinguished as two independent sources in the reconstructed image. It is also intended to study the effect of the main limitations of linear probes (geometry, frequency response and angular spectrum) on the spatial resolution. The results of this study shed light on the suitability of using each type of algorithm depending on the limiting conditions of the probe used and the imaging objective.","PeriodicalId":272387,"journal":{"name":"2022 IEEE International Ultrasonics Symposium (IUS)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124350137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Dual-Frequency Intravascular Ultrasound Transducer for Amplified Nanodroplet Vaporization Effects in Cavitation-Enhanced Sonothrombolysis","authors":"Sunho Moon, Huaiyu Wu, Bohua Zhang, Jinwook Kim, P. Dayton, Zhen Xu, Xiaoning Jiang","doi":"10.1109/IUS54386.2022.9958578","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9958578","url":null,"abstract":"Thromboembolism often leads to stroke, myocardial infarction, and other severe complications. There remains a need for new technologies for clinical thrombosis treatment. Sonothrombolysis mediated with cavitation-enhancing agents has shown promise in the treatment of thromboembolism in preclinical studies and clinical trials. Recent works have emphasized specifically efficient sonothrombolysis using phase-change nanodroplets, likely due to their generation of cavitation within the clot matrix. Yet, it has also been reported that nanodroplets might vaporize more effectively under high-frequency excitation and generate more cavitation with low-frequency excitation. Therefore, in this work, a dual-frequency (10 MHz/500 kHz) intravascular transducer intended for nanodroplet-specific sonothrombolysis was developed to improve clot mass reduction rate while retaining lower acoustic pressures than the typical nanodroplet vaporization threshold at sub-megahertz excitation (> 5 MPa). It results in a 34 % improvement of thrombolysis efficiency compared to a single low-frequency excitation.","PeriodicalId":272387,"journal":{"name":"2022 IEEE International Ultrasonics Symposium (IUS)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124360600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced resolution phase transformations in a Nitinol cymbal ultrasonic device","authors":"Struan Smith, Xuan Li, M. Hafezi, Paul Barron, M. Lucas, A. Feeney","doi":"10.1109/IUS54386.2022.9957560","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9957560","url":null,"abstract":"The traditional form of cymbal transducer is composed of cymbal endcaps bonded to a piezoelectric ceramic, whose radial vibrations drive relatively high amplitude endcap displacements. This transducer has been investigated for sonar and energy harvesting, but recent research has focused on adapting it for higher power applications, such as surgical cutting. In such procedures, there are known challenges in the efficient cutting of different materials, such as bone and muscular tissue, using one device. One viable method is to introduce adaptive dynamic properties, including operating frequency, by fabricating the caps with a shape memory alloy. Here, elastic modulus can be tuned by inducing a phase transformation, allowing rapid control of device dynamics. In this study, the temperature-dependent dynamics of a Nitinol cymbal device are examined using electrical impedance analysis and laser Doppler vibrometry, and practical aspects of introducing Nitinol into such devices are considered. The results show that a mixed austenitic and martensitic microstructure creates intermediate stiffnesses and exhibit the potential to administer minor temperature changes to achieve significant resonance shifts.","PeriodicalId":272387,"journal":{"name":"2022 IEEE International Ultrasonics Symposium (IUS)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114590487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Physics-Based Neural Network (PNN) Approach to Solving the Heterogeneous Nonlinear Fullwave Equation","authors":"Y. Li, G. Pinton","doi":"10.1109/IUS54386.2022.9957550","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9957550","url":null,"abstract":"The fullwave equation describes nonlinear acoustic wave propagation in a heterogenerous medium, which accounts for the linear propagation of the wave, thermoviscous diffusivity, nonlinearily, attenuation, and variation in density. Numerical solutions of the fullwave equation, including the Fullwave and k-wave toolboxes, are used in medical ultrasound imaging research. However, despite of the wide applications of these numerical tools, they are computationally intensive. We propose a physics-based neural network (PNN) approach to numerically solving the fullwave equation that describes the nonlinear propagation in a heterogeneous nonattenuating medium. The proposed network has been implemented in PyTorch and its structure is based on the fullwave equation. The structure and weights of the proposed neural network have clear physical interpretations. As a proof-of-concept demonstration, we show in this work the simulations of the propagation of acoustic pulses through a representation of the human abdomen, as well as through water. The flexibility of the physics-based neural network implementation enables the migration of computation from CPU to GPU with minimal additional efforts, which accelerates the computation by a factor of 12 compared to the Fullwave toolbox on CPU.","PeriodicalId":272387,"journal":{"name":"2022 IEEE International Ultrasonics Symposium (IUS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114744788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Robust Deep Neural Network Approach for Ultrafast Ultrasound Imaging using Single Angle Plane Wave","authors":"Mohammad Wasih, M. Almekkawy","doi":"10.1109/IUS54386.2022.9958466","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9958466","url":null,"abstract":"Recently, deep learning-based methods have been proposed to reconstruct high-quality images from a single plane wave ultrasound data. A major problem with these methods is that they train the underlying network indiscriminately of the plane wave angle. This poses computational problems during training, as many plane waves at different angles must be mapped to a common ground-truth or reference image. To alleviate this problem, we propose a linear data transformation technique which reduces the intra-data variance among ultrasound Radio Frequency (RF) data at different angles. We further design a convolutional neural network, denoted by “PWNet” which is trained using the transformed data to learn pixel weights for enhancing the image quality of the single plane wave delay and sum method. The results obtained on the experimental and simulated Plane-wave Imaging Challenge in Medical UltraSound data demonstrate the accuracy of our proposed method which would be beneficial for applications requiring high-quality images reconstructed at higher frame rates.","PeriodicalId":272387,"journal":{"name":"2022 IEEE International Ultrasonics Symposium (IUS)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115997108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On Estimation of Sound Velocity and Attenuation in Common 3D-Printing Filaments","authors":"Shafaq Zia, J. Carlson, Pia Åkerfeldt","doi":"10.1109/IUS54386.2022.9958029","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9958029","url":null,"abstract":"Estimation of frequency-dependent attenuation and speed of sound using ultrasound is of great importance. The acoustic properties can be used for material characterization and to study the local variations in a solid. As ultrasound is a mechanical wave, it is directly sensitive to changes in the material properties. The layered nature of additively manufactured prod-ucts pose a challenge for the estimation of acoustic properties. The non-parametric approaches using frequency transforms are sensitive to noise. In this paper, a parametric model is used to estimate the phase velocity and attenuation of 3D-printed cubes. The received signal from the cubes is a superposition of the backscattered responses from multiple layers of the printed part. A reference echo from aluminium is used as an input to the linear model and to estimate the received ultrasound response. The estimate of the ultrasound signal using the linear model is similar to the measured data and it suggests that it can be used to estimate wave propagation in additively manufactured products. The estimated acoustic properties show an increasing trend with the frequency and dispersion can be seen due to the layered nature of the material.","PeriodicalId":272387,"journal":{"name":"2022 IEEE International Ultrasonics Symposium (IUS)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116283503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Linking Ultrasound Data to Manufacturing Parameters of 3D-printed Polymers Using Supervised Learning","authors":"Shafaq Zia, J. Carlson, Pia Åkerfeldt","doi":"10.1109/IUS54386.2022.9957554","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9957554","url":null,"abstract":"Additive manufacturing is used to produce complex and tailored products that cannot be achieved using conventional manufacturing approaches. The products can be made from different materials including polymers, metals, etc. The material is added layer by layer to create a final product. The mechanical properties of the final part depend on the process parameters. To improve the quality of the product these manufacturing parameters need to be optimised and for this purpose machine learning along with ultrasound measurements can be used. In this paper, the manufacturing parameters of 50 mm thick polymer cubes are linked to the ultrasound data using partial least squares regression. Three cubes with varying layer heights are made from PLA and ABS each, backscattered responses of ultrasound are recorded from these six cubes. The ultrasound data is used in partial least squares algorithm to estimate the layer height and the filament type. The clusters that are formed using the first few components obtained from the algorithm show that the data points of the six cubes can be distinguished and the manufacturing parameters are estimated with good accuracy.","PeriodicalId":272387,"journal":{"name":"2022 IEEE International Ultrasonics Symposium (IUS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116413426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical Investigation of Multiple Scattering and Mode-Converted Shear Waves Caused by Temporal Bone in Transcranial Photoacoustic Imaging","authors":"Fatemeh Hosseini, Moein Mozaffarzadeh, Ali Mahlooiifar, M. Verweij, N. de Jong","doi":"10.1109/IUS54386.2022.9957367","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9957367","url":null,"abstract":"In recent years, transcranial photoacoustic (TPA) imaging has become a popular modality for diagnosis of brain disorders. However, due to the presence of skull, TPA images are strongly degraded. Acoustically, this degradation is mainly categorized into the phase aberration, mode-converted shear waves, and multiple scattering. Previous studies numerically investigated the effects of mode-converted shear waves and multiple scattering on TPA images while the phase aberration caused by the skull was ignored and a conventional delay-and-sum method was employed for reconstructing TPA images. In this paper, we investigate these effects while a refraction-corrected image reconstruction approach is used to form TPA images. This approach enables separating the effects of phase aberration, mode-converted shear wave and multiple scattering. A realistic human temporal bone based on a MicroCT was used in the numerical model. In average for all the absorbers, the power of the artifacts caused by the mode-converted shear wave and multiple scattering are -13.7 dB and -20.1 dB when the refraction is corrected during image formation, respectively. These values were -7.9 and -18.8 if the conventional reconstruction is used. Accounting for phase aberration enables accurate quantification of the effects of the mode-converted shear waves and multiple scattering, which is necessary for evaluating the methods developed for degrading these effects.","PeriodicalId":272387,"journal":{"name":"2022 IEEE International Ultrasonics Symposium (IUS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123702421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}