2012 IEEE International Ultrasonics Symposium最新文献

A 9-channel low-power receiver ASIC for 3D transesophageal echocardiography 用于经食管三维超声心动图的9通道低功耗ASIC接收器

2012 IEEE International Ultrasonics Symposium Pub Date : 2012-12-01 DOI: 10.1109/ULTSYM.2012.0516

Z. Yu, S. Blaak, C. Prins, Z. Chang, C. Lancée, J. Bosch, N. de Jong, G. Meijer, M. Pertijs

引用次数: 2

Dispersion characteristics of high-order lamb wave modes in an AlN/3C-SiC layered plate AlN/3C-SiC层状板中高阶lamb波的色散特性

2012 IEEE International Ultrasonics Symposium Pub Date : 2012-12-01 DOI: 10.1109/ULTSYM.2012.0132

Chih-Ming Lin, Yung-Yu Chen, V. Felmetsger, D. Senesky, A. Pisano

{"title":"Dispersion characteristics of high-order lamb wave modes in an AlN/3C-SiC layered plate","authors":"Chih-Ming Lin, Yung-Yu Chen, V. Felmetsger, D. Senesky, A. Pisano","doi":"10.1109/ULTSYM.2012.0132","DOIUrl":"https://doi.org/10.1109/ULTSYM.2012.0132","url":null,"abstract":"A new propagation layered media composed of a piezoelectric thin film and a substrate plate is studied in this work. The displacement profiles, phase velocities, and electromechanical coupling coefficients of Lamb wave modes are theoretically investigated for the c-axis oriented AlN films on cubic silicon carbide (3C-SiC) plates. Due to the different material properties of the AlN and 3C-SiC layers, the displacement profiles of Lamb wave modes are not simply antisymmetric or symmetric with respect to the neutral axis. According to the displacement profiles, the plate acoustic wave modes in the layered plate are classified as quasi-Lamb wave modes. Some high-order quasi-Lamb wave modes in the layered plate have larger electromechanical couplings than the corresponding Lamb wave modes in an AlN thin plate. In addition, the third quasi-symmetric (QS3) Lamb wave mode exhibits a low motional impedance (Rm) of 91 ohm and a high quality factor (Q) up to 5510 at a frequency (fs) of 2.92 GHz, resulting in the highest fs·Q product, 1.61×1013 Hz, among suspended piezoelectric thin film resonators reported to date.","PeriodicalId":150948,"journal":{"name":"2012 IEEE International Ultrasonics Symposium","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128294190","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: 3

Comb-push Ultrasound Shear Elastography (CUSE): A novel and fast technique for shear elasticity imaging 梳子推超声剪切弹性成像(CUSE):一种新型的快速剪切弹性成像技术

2012 IEEE International Ultrasonics Symposium Pub Date : 2012-12-01 DOI: 10.1109/ULTSYM.2012.0462

P. Song, M. Urban, A. Manduca, Heng Zhao, J. Greenleaf, Shigao Chen

{"title":"Comb-push Ultrasound Shear Elastography (CUSE): A novel and fast technique for shear elasticity imaging","authors":"P. Song, M. Urban, A. Manduca, Heng Zhao, J. Greenleaf, Shigao Chen","doi":"10.1109/ULTSYM.2012.0462","DOIUrl":"https://doi.org/10.1109/ULTSYM.2012.0462","url":null,"abstract":"Multiple push-detect acquisitions are typically required in current acoustic radiation force based shear wave elasticity imaging methods to reconstruct a full FOV elasticity map, which can result in potential motion artifacts and difficulties in studying tissue dynamic mechanical properties. Comb-push Ultrasound Shear Elastography (CUSE) is a novel and fast shear elasticity imaging technique which utilizes the comb-push to produce a complex shear wave field with shear waves propagating through all imaging pixels so that a full FOV shear elasticity map can be reconstructed with only one rapid data acquisition (less than 25 ms). Three versions of CUSE are presented in this paper: Unfocused CUSE (U-CUSE), Focused CUSE (F-CUSE), and Marching CUSE (M-CUSE). Homogeneous and inclusion phantom experiments showed that all CUSE methods produced accurate and smooth shear elasticity maps with excellent contrast between the inclusion and background. Comparable elasticity maps to Supersonic Shear Imaging (SSI) could be obtained using CUSE, with low MI and heating. Finally, the feasibility of using CUSE in clinical studies was demonstrated by promising results from preliminary in vivo case studies on human biceps muscle, thyroid, breast and liver.","PeriodicalId":150948,"journal":{"name":"2012 IEEE International Ultrasonics Symposium","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129047124","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: 15

Technique to combine images produced by different propagation modes of guided waves for damage detection and contrast improvement in plate-like structures 结合不同导波传播方式产生的图像用于板状结构损伤检测和对比度提高的技术

2012 IEEE International Ultrasonics Symposium Pub Date : 2012-12-01 DOI: 10.1109/ULTSYM.2012.0360

Vander Teixeira Prado, Ricardo Tokio Higuti, C. Kitano, Ó. Martínez-Graullera, Julio Cezar Adamowski

{"title":"Technique to combine images produced by different propagation modes of guided waves for damage detection and contrast improvement in plate-like structures","authors":"Vander Teixeira Prado, Ricardo Tokio Higuti, C. Kitano, Ó. Martínez-Graullera, Julio Cezar Adamowski","doi":"10.1109/ULTSYM.2012.0360","DOIUrl":"https://doi.org/10.1109/ULTSYM.2012.0360","url":null,"abstract":"This paper describes an image compounding technique based on the use of different apodization functions, the evaluation of the signals phases and information from the interaction of different propagation modes of Lamb waves with defects for enhanced damage detection, resolution and contrast. A 16 elements linear array is attached to a 1 mm thickness isotropic aluminum plate with artificial defects. The array can excite the fundamental A0 and S0 modes at the frequencies of 100 kHz and 360 kHz, respectively. For each mode two synthetic aperture (SA) images with uniform and Blackman apodization and one image of Coherence Factor Map (CFM) are obtained. The specific interaction between each propagation mode and the defects and the characteristics of acoustic radiation patterns due to different apodization functions result in images with different resolution and contrast. From the phase information one of the SA images is selected at each pixel to compound the final image. The SA images are multiplied by the CFM image to improve contrast and for the dispersive A0 mode it is used a technique for dispersion compensation. There is a contrast improvement of 47.5 dB, reducing the dead zone and improving resolution and damage detection.","PeriodicalId":150948,"journal":{"name":"2012 IEEE International Ultrasonics Symposium","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129149933","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: 3

Counter-propagation interaction for contrast-enhanced ultrasound imaging 反传播相互作用的对比增强超声成像

2012 IEEE International Ultrasonics Symposium Pub Date : 2012-12-01 DOI: 10.1109/ULTSYM.2012.0169

G. Renaud, J. Bosch, N. de Jong, A. V. D. van der Steen, V. Shamdasani, R. Entrekin

{"title":"Counter-propagation interaction for contrast-enhanced ultrasound imaging","authors":"G. Renaud, J. Bosch, N. de Jong, A. V. D. van der Steen, V. Shamdasani, R. Entrekin","doi":"10.1109/ULTSYM.2012.0169","DOIUrl":"https://doi.org/10.1109/ULTSYM.2012.0169","url":null,"abstract":"Most techniques for contrast-enhanced ultrasound imaging such as phase inversion and amplitude modulation require linear propagation to detect nonlinear scattering of contrast agent microbubbles. Waveform distortion due to nonlinear propagation impairs the ability to distinguish contrast agent microbubbles from tissue. This leads to erroneous detection of contrast agent behind any vessel or blood pool containing contrast agent. These artifacts can significantly impair the accuracy of medical diagnoses. Unlike biological tissue, lipid-coated gas microbubbles used as contrast agent allow the interaction of two ultrasound waves propagating in opposite directions (counter-propagation). We describe a strategy to detect microbubbles based on counter-propagation interaction that is free from nonlinear propagation artifacts. The new method was implemented in an ultrasound scanner (Philips iU22 and L9-3 probe) and tested in vitro in a tissue-mimicking phantom containing a cavity filled with a 1:1000 dilution of BR14 contrast agent (Bracco). It is compared to the default contrast mode of the scanner employing amplitude modulation as a technique to detect contrast agent microbubbles. A low acoustic pressure (110 kPa peak pressure) as used in vivo for carotid imaging is employed in our in vitro study. Whereas amplitude modulation produces a pseudo-enhancement behind the cavity in the contrast image, the pulse sequence exploiting counterpropagating wave interaction is free from artifacts due nonlinear propagation in contrast agent.","PeriodicalId":150948,"journal":{"name":"2012 IEEE International Ultrasonics Symposium","volume":"2593 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128814135","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

Implementation of arbitrary contrast imaging strategies on an US Open Platform 在美国开放平台上任意对比成像策略的实现

2012 IEEE International Ultrasonics Symposium Pub Date : 2012-12-01 DOI: 10.1109/ULTSYM.2012.0170

F. Guidi, R. Mori, J. Viti, N. de Jong, P. Tortoli

引用次数: 1

Shear wave speed measurement using repeated short push pulses 用重复短推力脉冲测量横波速度

2012 IEEE International Ultrasonics Symposium Pub Date : 2012-12-01 DOI: 10.1109/ULTSYM.2012.0465

Heng Zhao, C. Amador, M. Urban, P. Song, J. Greenleaf, Shigao Chen

引用次数: 1

Ultrasound therapy amplifies chemotherapeutic effectiveness in head and neck cancer 超声治疗可提高头颈癌化疗的疗效

2012 IEEE International Ultrasonics Symposium Pub Date : 2012-12-01 DOI: 10.1109/ULTSYM.2012.0107

A. Sorace, Joseph A. Knowles, C. Heath, E. Rosenthal, K. Hoyt

{"title":"Ultrasound therapy amplifies chemotherapeutic effectiveness in head and neck cancer","authors":"A. Sorace, Joseph A. Knowles, C. Heath, E. Rosenthal, K. Hoyt","doi":"10.1109/ULTSYM.2012.0107","DOIUrl":"https://doi.org/10.1109/ULTSYM.2012.0107","url":null,"abstract":"Microbubble (MB) mediated ultrasound (US) therapy is a novel technique to non-invasively enhance cancer treatment by increasing cell membrane permeability and vascular extravasation. The objective of this experiment is to determine if MB-mediated US therapy can improve cancer therapy, specifically cisplatin or cetuximab, in head and neck cancer. In vitro experiments included combination chemotherapy and MB-mediated US therapy on head and neck cancer cell line, SCC-5, and dose curve responses to therapy. In vivo experimentation included a four week study of MB-mediated US therapy compared to current standard therapy of drug alone. Monitoring of tumor response to therapy included caliper measurements, diffusion-weighted magnetic resonance (DW-MR) imaging, and immunohistologic analysis. Anti-tumor effects increased by over 50% when combining MB-mediated US therapy with cetuximab and cisplatin (P = 0.01, P = 0.02). MBmediated US therapy was seen to produce as additive effect by increasing localized delivery of drug in head and neck cancer. This technique shows potential for improved localized therapy in cancer.","PeriodicalId":150948,"journal":{"name":"2012 IEEE International Ultrasonics Symposium","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129328574","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

Polarization inverted (0001) / (000-1) ScAIN film resonators operating in second overtone mode 在第二泛音模式下工作的极化倒置(0001)/(000-1)扫描薄膜谐振器

2012 IEEE International Ultrasonics Symposium Pub Date : 2012-12-01 DOI: 10.1109/ULTSYM.2012.0482

Masashi Suzuki, T. Yanagitani, H. Odagawa

引用次数: 2

Influence of microbubble size distribution on postexcitation thresholds for single ultrasound contrast agent using double passive cavitation detection 双被动空化检测单超声造影剂微泡大小分布对激发后阈值的影响

2012 IEEE International Ultrasonics Symposium Pub Date : 2012-12-01 DOI: 10.1109/ULTSYM.2012.0103

M. Gauthier, D. King, W. O’Brien

{"title":"Influence of microbubble size distribution on postexcitation thresholds for single ultrasound contrast agent using double passive cavitation detection","authors":"M. Gauthier, D. King, W. O’Brien","doi":"10.1109/ULTSYM.2012.0103","DOIUrl":"https://doi.org/10.1109/ULTSYM.2012.0103","url":null,"abstract":"A recent study has shown that double passive cavitation detection (DPCD) is a valid method for determining cavitation characteristics including collapse thresholds of isolated microbubbles based on the detection of postexcitation signal (PES) occurring 1 to 5 μs after the principle excitation of the bubble. The hypothesis is that PES is associated with the collapse of a free gas bubble released from the ultrasound contrast agent (UCA) after the rupture of its shell. It has been shown that responses of UCAs depend on several parameters such as the shell and gas core as well as the size of the microbubble. However, a detailed study of the influence of size distribution only on single microbubble collapse thresholds is still not available. The aim of this study was to determine whether there was a significant correlation between microbubble size distribution and collapse thresholds. Experiments were performed using serum albumin and dextrose microbubbles. Four size distributions were obtained and we determined microbubble collapse thresholds for each distribution using the DPCD method (3 cycle tone bursts at the central frequency of 4.6 MHz). Statistical analysis was based on comparing the means of collapse threshold for the four size distributions using an analysis of variance. The microbubble collapse threshold was found to be significantly (p<;0.05) correlated to the microbubble size distribution: the DPCD experiments demonstrated that, in the configuration of the experiments, PES thresholds were higher for microbubbles exhibiting smaller size distribution.","PeriodicalId":150948,"journal":{"name":"2012 IEEE International Ultrasonics Symposium","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129022218","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