2019 IEEE International Ultrasonics Symposium (IUS)最新文献_第4页

Forward-looking Intravascular Ultrasound Catheter with an Electromagnetic Micro-Motor 带电磁微型马达的前视血管内超声导管

2019 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2019-10-01 DOI: 10.1109/ULTSYM.2019.8925894

Yunfei Li, Hu Tang, Siping Chen, Jue Peng

引用次数: 2

Assessment of Side Lobe Estimation Accuracy Using Side Lobe Free Image 利用无旁瓣图像评估旁瓣估计精度

2019 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2019-10-01 DOI: 10.1109/ULTSYM.2019.8925550

M. Jeong, S. Kwon, M. Choi

{"title":"Assessment of Side Lobe Estimation Accuracy Using Side Lobe Free Image","authors":"M. Jeong, S. Kwon, M. Choi","doi":"10.1109/ULTSYM.2019.8925550","DOIUrl":"https://doi.org/10.1109/ULTSYM.2019.8925550","url":null,"abstract":"In order to effectively suppress side lobes in ultrasound imaging, it is necessary to quantify the signal amplitude due to side lobes at imaging points. The received channel data before receive beamforming are modeled as a sum of sinusoids having different spatial frequencies depending on the angle incident on a receiving array. In the signal constituting the channel data, the signal due to the main lobe has a DC frequency, whereas the signal due to the side lobe has a spatial frequency that is approximately proportional to the incident angle. Taking the Fourier transform of the received channel data after zero padding, we can accurately estimate side lobes. In computer simulation of ultrasound images, we generate ultrasonic echoes returned from random scatterers. Because we already know the position of all reflectors, we can separate the signals reflected due to the main and side lobes so that the true side lobe level at each imaging point can be computed accurately. The main lobe image can be used as a gold standard for assessing a side lobe suppression filter. The true and estimated side lobes can be used in side lobe suppression filtering of ultrasound images. We obtained the conventional, true side lobe, and estimated side lobe images for an object containing a wire and a cyst using computer simulation in a 64 channel focusing system with a 5 MHz linear array transducer. In the hypoechoic cyst, the estimated side lobe is almost the same as the true side lobe. We confirmed that the estimated side lobe can effectively be used in side lobe suppression filtering. Therefore, it is feasible to quantitatively estimate side lobes from the channel data, and improve the performance of the side lobe suppression filter in ultrasound imaging.","PeriodicalId":6759,"journal":{"name":"2019 IEEE International Ultrasonics Symposium (IUS)","volume":"43 1","pages":"1451-1454"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82546381","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}

引用次数: 2

Non-rigid Motion Correction for Ultrasound Localization Microscopy of the Liver in vivo 活体肝脏超声定位显微镜的非刚性运动校正

2019 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2019-10-01 DOI: 10.1109/ULTSYM.2019.8925749

Yayu Hao, Qin Wang, Yi Yang, Zhi Liu, Qiong He, Lai Wei, Jianwen Luo

{"title":"Non-rigid Motion Correction for Ultrasound Localization Microscopy of the Liver in vivo","authors":"Yayu Hao, Qin Wang, Yi Yang, Zhi Liu, Qiong He, Lai Wei, Jianwen Luo","doi":"10.1109/ULTSYM.2019.8925749","DOIUrl":"https://doi.org/10.1109/ULTSYM.2019.8925749","url":null,"abstract":"Chronic liver diseases (CLDs) are a major killer of humans, and more than 1 billion people suffer from CLDs worldwide, which are likely to develop significant liver fibrosis (LF) and even cirrhosis. However, current noninvasive diagnostic methods for liver diseases are insensitive to early lesions, so accurate assessment of LF at early stage is very important for the treatment arrangement and fibrosis reversal before cirrhosis. Ultrasound localization microscopy (ULM) with contrast microbubbles (MBs) have been proposed by several groups and may have potential in evaluating LF at early stage. Unfortunately, breathing and heart beating can introduce motion artifacts in liver ULM, which brings the challenge for LF evaluation with ULM. Recently, rigid motion correction (MoCo) has been proposed to improve the performance of ULM of the brain and kidney. Considering typical non-rigid motion in the liver, the performance of rigid MoCo may be limited. Therefore, we propose a non-rigid MoCo method based on speckle tracking to improve the performance of liver ULM more effectively. Results of in vivo experiments indicate that ULM with non-rigid MoCo obtains better resolution and more continuous microvessels (MVs) than rigid MoCo.","PeriodicalId":6759,"journal":{"name":"2019 IEEE International Ultrasonics Symposium (IUS)","volume":"53 1","pages":"2263-2266"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78653702","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}

引用次数: 12

Ultrasonic structural health monitoring - current applications and potential 超声结构健康监测的现状及应用前景

2019 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2019-10-01 DOI: 10.1109/ULTSYM.2019.8926176

P. Cawley

引用次数: 2

Mechanical Characterization of Biofilms by Optical Coherence Elastography (OCE) Measurements of Elastic Waves 利用光学相干弹性成像(OCE)测量弹性波来表征生物膜的力学特性

2019 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2019-10-01 DOI: 10.1109/ULTSYM.2019.8925714

Hong-Cin Liou, F. Sabba, G. Wells, O. Balogun

引用次数: 0

High Density Arrays of Carbon Nanomembrane Ultrasonic MEMS 碳纳米膜超声MEMS的高密度阵列

2019 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2019-10-01 DOI: 10.1109/ULTSYM.2019.8925677

A. Ghis, Matthieu Matringe, O. Ndjoye-Kogou, F. Blard, F. Frassati, L. Van-Jodin

引用次数: 0

Acoustic Wave Sparsely-Activated Localization Microscopy (AWSALM): In Vivo Fast Ultrasound Super-Resolution Imaging using Nanodroplets 声波稀疏激活定位显微镜(AWSALM):利用纳米液滴在体内快速超声超分辨率成像

2019 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2019-10-01 DOI: 10.1109/ULTSYM.2019.8926069

Ge Zhang, P. Weinberg, C. Dunsby, M. Tang, S. Harput, M. Toulemonde, Jacob Broughton-Venner, Jiaqi Zhu, K. Riemer, K. Christensen-Jeffries, Jemma Brown, R. Eckersley

{"title":"Acoustic Wave Sparsely-Activated Localization Microscopy (AWSALM): In Vivo Fast Ultrasound Super-Resolution Imaging using Nanodroplets","authors":"Ge Zhang, P. Weinberg, C. Dunsby, M. Tang, S. Harput, M. Toulemonde, Jacob Broughton-Venner, Jiaqi Zhu, K. Riemer, K. Christensen-Jeffries, Jemma Brown, R. Eckersley","doi":"10.1109/ULTSYM.2019.8926069","DOIUrl":"https://doi.org/10.1109/ULTSYM.2019.8926069","url":null,"abstract":"Current localization-based super-resolution ultrasound imaging requires a low concentration of flowing microbubbles to visualize microvasculature beyond the diffraction limit and acquisition is slow. Nanodroplets offer a promising solution as they can be sparsely activated and deactivated on-demand. In this study, acoustic wave sparsely-activated localization microscopy (AWSALM) using activation and deactivation of nanodroplets, an acoustic counterpart of photo-activated localization microscopy (PALM) which is less dependent on agent concentration and the presence of flow, is demonstrated for super-resolution imaging in deep tissues in vivo. An in vivo super-resolution image of a rabbit kidney is obtained in 1.1 seconds using AWSALM, where micro-vessels with apparent sizes far below the half-wavelength of 220 µm were visualized. This preliminary result demonstrates the feasibility of applying AWSALM for in vivo super-resolution imaging.","PeriodicalId":6759,"journal":{"name":"2019 IEEE International Ultrasonics Symposium (IUS)","volume":"27 1","pages":"1930-1933"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86991861","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}

引用次数: 6

Delay Compression: Reducing Delay Calculation Requirements for 3D Plane-Wave Ultrasound 延迟压缩:降低三维平面波超声的延迟计算要求

2019 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2019-10-01 DOI: 10.1109/ULTSYM.2019.8925725

Brendan L. West, Jian Zhou, C. Chakrabarti, T. Wenisch

{"title":"Delay Compression: Reducing Delay Calculation Requirements for 3D Plane-Wave Ultrasound","authors":"Brendan L. West, Jian Zhou, C. Chakrabarti, T. Wenisch","doi":"10.1109/ULTSYM.2019.8925725","DOIUrl":"https://doi.org/10.1109/ULTSYM.2019.8925725","url":null,"abstract":"In 3D plane-wave ultrasound, computational requirements are directly proportional to the number of focal points in a volume. For a receive aperture of size of M<inf>x</inf>M<inf>y</inf> transducers, a beamforming aperture size of N<inf>x</inf>N<inf>y</inf>, and a depth of M<inf>z</inf> focal points, M<inf>x</inf> M<inf>y</inf> M<inf>z</inf> N<inf>x</inf> N<inf>y</inf> round-trip delays must be computed. To reduce this requirement, we decompose the planar transmit distance into two parts: (1) from the plane-wave’s origin to the first point in each focal line, and (2) from the plane when it is touching the first point in each focal line to each subsequent focal point along that line. The latter distance, as well as the reflection distances, are symmetric across beamforming apertures, and thus their computation can be shared. This decomposition results in up to a M<inf>x</inf> M<inf>y</inf> reduction in the number of unique delays while retaining full image quality. Using our technique, precomputing delays and storing them in look-up tables (LUTs) is now possible for 3D plane-wave ultrasound for the first time, opening new doors for computational architectures in this field. Our method works with 2D, 3D, and 3D-separable variants of plane-wave ultrasound.","PeriodicalId":6759,"journal":{"name":"2019 IEEE International Ultrasonics Symposium (IUS)","volume":"42 1","pages":"1278-1281"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87011641","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}

引用次数: 1

Diagnosis of osteoporosis using the low frequency acoustic response of mice femoral bones irradiated by a high frequency acoustic radiation pulse 利用高频声辐射脉冲照射小鼠股骨的低频声反应诊断骨质疏松症

2019 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2019-10-01 DOI: 10.1109/ULTSYM.2019.8925543

G. Braz, P. M. Agnollitto, M. Nogueira-Barbosa, T. Pavan, Antonio A. O. Carneiro

{"title":"Diagnosis of osteoporosis using the low frequency acoustic response of mice femoral bones irradiated by a high frequency acoustic radiation pulse","authors":"G. Braz, P. M. Agnollitto, M. Nogueira-Barbosa, T. Pavan, Antonio A. O. Carneiro","doi":"10.1109/ULTSYM.2019.8925543","DOIUrl":"https://doi.org/10.1109/ULTSYM.2019.8925543","url":null,"abstract":"Quantitative characterization of the mechanical properties of bones is of great importance to diagnostic pathological processes. For example, osteoporotic bones have some differences in the mechanical properties if compared with the healthy ones. In this study a new technique based on acoustic radiation force has been used as an alternative to evaluate the differences in the mechanical properties of bones, that can lead to a new method to the diagnosis of bone diseases. The technique uses a single high-frequency ultrasound pulse (MHz) to excite the medium. Non-linear interactions of this acoustic wave in the tissue produces a lower frequency signal (kHz). Femoral bones where excised from 10 healthy mice and also from 10 mice where osteoporosis had been induced. Using µCT, the porosity, trabecular number, trabecular spacing, connectivity and the connectivity density of those bones where obtained. The following step was to irradiate those samples with a short focused acoustic radiation pulse (f=3.1 MHz, t=15 µs) and acquire the low frequency acoustic response using a dedicated hydrophone (ITC 6050) with acquisition band going from 1kHz to 70 kHz. A spectral analysis of the acquired signal has been done and the results compared with the µCT data in order to see if there where correlation between them. Also, a hypothesis test has been done to see if the technique can differentiate the samples coming from the healthy group and the osteoporotic. A strong correlation was obtained between the values from the spectral analysis of the low frequency acoustic response and from the trabecular number parameter µCT (spearman correlation coefficient of 0.72 and p-value of 0.02), also a moderate correlation has been found with the connectivity parameter ( spearman correlation coefficient of 0.69 and p-value of 0.03) showing that the technique is sensible to the mechanical parameters .","PeriodicalId":6759,"journal":{"name":"2019 IEEE International Ultrasonics Symposium (IUS)","volume":"38 1","pages":"529-531"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87087154","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}

引用次数: 0

Ultrasonic Implant Localization for Wireless Power Transfer: Active Uplink and Harmonic Backscatter 无线电力传输的超声植入定位:有源上行和谐波反向散射

2019 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2019-10-01 DOI: 10.1109/ULTSYM.2019.8926006

Max L. Wang, T. Chang, A. Arbabian

引用次数: 12