2007 IEEE Ultrasonics Symposium Proceedings最新文献_第10页

P1C-5 Transient Acoustic Radiation Force Elastography for HIFU Guidance and Monitoring P1C-5瞬态声辐射力弹性成像用于HIFU引导和监测

2007 IEEE Ultrasonics Symposium Proceedings Pub Date : 2007-12-26 DOI: 10.1109/ULTSYM.2007.338

G. Berry, D. Melodelima, J. Bamber, Yixin Ma, I. Rivens, G. Terhaar

{"title":"P1C-5 Transient Acoustic Radiation Force Elastography for HIFU Guidance and Monitoring","authors":"G. Berry, D. Melodelima, J. Bamber, Yixin Ma, I. Rivens, G. Terhaar","doi":"10.1109/ULTSYM.2007.338","DOIUrl":"https://doi.org/10.1109/ULTSYM.2007.338","url":null,"abstract":"High intensity focused ultrasound (HIFU) has previously been used to destroy tumor tissue near the focus of the ultrasound beam. However, it can be difficult to predict in advance where the lesion associated with a given exposure will form. Furthermore, a means of verifying that the entire tumour mass has been ablated is required. In this study, a new technique was investigated in which the acoustic radiation force that can be generated by running the HIFU transducer for short (10 ms), sub-ablative exposures, was used to generate localised and transient stresses inside the medium. Commercial diagnostic ultrasound scanners and elastographic techniques for displacement tracking and strain estimation were then applied to image both the induced displacement and strain distributions. Each single sub- ablative pulse from the HIFU transducer was found to provide a useful way to help localise the focus of the ultrasound beam (i.e. before any lesions are formed). Multiple sub- ablative pulses on the other hand, where the position of the focus was translated between exposures and, at each focus position, the local induced strain was calculated, were shown to be useful for constructing a composite image of local strain inside the tissue. Such transient strain images show contrast for stiffness, which is considerably increased by thermal coagulation of tissue, and should therefore be helpful post-ablation, in revealing the location and extent of tissue damage. We conclude that elastographic displacement and strain imaging, in which transient acoustic radiation force is generated by the HIFU transducer, has considerable potential to be used in the guidance and monitoring of HIFU treatment.","PeriodicalId":6355,"journal":{"name":"2007 IEEE Ultrasonics Symposium Proceedings","volume":"83 1","pages":"1345-1348"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83984509","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

3C-1 Review of Wave Propagation in BAW Thin Film Devices - Progress and Prospects 波在BAW薄膜器件中的传播研究进展与展望

2007 IEEE Ultrasonics Symposium Proceedings Pub Date : 2007-12-26 DOI: 10.1109/ULTSYM.2007.43

J. Kaitila

引用次数: 45

P3I-1 Effect of Gamma and Neutron Radiation on Quartz SAW Resonators γ和中子辐射对石英SAW谐振器的影响

2007 IEEE Ultrasonics Symposium Proceedings Pub Date : 2007-12-26 DOI: 10.1109/ULTSYM.2007.473

A. Ternawly, R. Kleiman, P.M. Smith

引用次数: 1

P2C-1 A Training Station to Facilitate Transcranial Ultrasound Imaging p2c - 1a训练站，方便经颅超声成像

2007 IEEE Ultrasonics Symposium Proceedings Pub Date : 2007-12-26 DOI: 10.1109/ULTSYM.2007.394

C. Hansen, J. Opretzka, B. Brendel, H. Ermert, M. Engelhardt, C. Brenke, K. Schmieder, S. Hold, K. Hensel, C. Krogias

引用次数: 0

12B-5 Eigen-Based Clutter Filters for Color Flow Imaging: Single-Ensemble vs. Multi-Ensemble Approaches 基于特征的杂波滤波器用于彩色流成像:单集成与多集成方法

2007 IEEE Ultrasonics Symposium Proceedings Pub Date : 2007-12-26 DOI: 10.1109/ULTSYM.2007.278

A. Yu, L. Løvstakken

引用次数: 7

9E-6 Acoustic Realignment of Nematic Liquid Crystals by Guided Waves 9E-6导波对向列型液晶的声学重新排列

2007 IEEE Ultrasonics Symposium Proceedings Pub Date : 2007-12-26 DOI: 10.1109/ULTSYM.2007.213

Y. Lee, Wun-Bin Shih, Yu-Wei Su, C. Yin

引用次数: 0

P6G-2 Synthesis of Frequency Response for Wideband SAW Ladder Type Filters P6G-2宽带声表面波梯形滤波器频率响应综合

2007 IEEE Ultrasonics Symposium Proceedings Pub Date : 2007-12-26 DOI: 10.1109/ULTSYM.2007.648

T. Omori, Y. Tanaka, K. Hashimoto, M. Yamaguchi

{"title":"P6G-2 Synthesis of Frequency Response for Wideband SAW Ladder Type Filters","authors":"T. Omori, Y. Tanaka, K. Hashimoto, M. Yamaguchi","doi":"10.1109/ULTSYM.2007.648","DOIUrl":"https://doi.org/10.1109/ULTSYM.2007.648","url":null,"abstract":"Numerical synthesis of frequency response is discussed for a ladder type filter consisting of ultra-wideband SAW resonators on Cu-grating/15degYX-LiNbO3 structure. For the synthesis, two parameters of each resonator, i.e., the static capacitance and resonant frequency were numerically optimised, while the capacitance ratio and figure of merit were fixed at specific values determined by substrates and grating electrodes employed. First, six-stage SAW ladder type filters having the passband width of 7 to 21% were designed. The result showed that the specified bandwidth is successfully synthesised. Next, a six-stage ladder type filter having the passband width of 8% was fabricated on Cu-grating/15degYX-LiNbO3 structure for experimental discussion. It was shown that the measured frequency response of the filter was in good agreement with the design, where some in-band spurious dips were removed by weighted dummy electrodes. By making analysis on the behaviour of resonant and anti-resonant frequencies of each resonator, it is shown that the method can be extended to the synthesis of filters having sophisticated frequency responses. The result suggested that the proposed method could become one of the powerful design tools for SAW ladder type filters with specified passband width.","PeriodicalId":6355,"journal":{"name":"2007 IEEE Ultrasonics Symposium Proceedings","volume":"7 1","pages":"2574-2577"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82573720","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: 9

5E-3 Experimental Evidence for a Growing Surface Wave and Acoustic Beam Narrowing upon Reflection from Fluid-Solid Interfaces 5E-3流固界面反射时表面波增长和声波束变窄的实验证据

2007 IEEE Ultrasonics Symposium Proceedings Pub Date : 2007-12-26 DOI: 10.1109/ULTSYM.2007.107

O. Sapozhnikov, A. Karabutov, V. Mozhaev

引用次数: 0

P1I-1 Acoustical Parameters Characterisation of Aluminium Nitride Thin Film BAW Resonators Using Resonant Spectrum Approach 用共振谱法表征氮化铝薄膜BAW谐振器的声学参数

2007 IEEE Ultrasonics Symposium Proceedings Pub Date : 2007-12-26 DOI: 10.1109/ULTSYM.2007.361

D. Cornez, S. Lapp, S. Cochran, K. Kirk

{"title":"P1I-1 Acoustical Parameters Characterisation of Aluminium Nitride Thin Film BAW Resonators Using Resonant Spectrum Approach","authors":"D. Cornez, S. Lapp, S. Cochran, K. Kirk","doi":"10.1109/ULTSYM.2007.361","DOIUrl":"https://doi.org/10.1109/ULTSYM.2007.361","url":null,"abstract":"The determination of piezoelectric properties of an aluminium nitride thin film sandwiched between two electrodes, and acoustically coupled to a supporting substrate, is considered. Measuring the properties of such a BAW composite resonator can be used for film characterisation. The resonant spectrum method has been implemented, which consists of analysing the variation in spacing of parallel resonant frequencies for the resonator. The film parameters were derived from experimental measurements of the insertion loss (s11) of aluminium nitride deposited on glass and LiNO3 respectively, with top and bottom electrodes. A one-dimensional model was used to simulate the functional behaviour of the two examples of four-layer aluminium nitride based resonators. The modelling technique for multilayer ultrasonic transducers was based on the solutions to the 1-D wave equation. It was possible to obtain good agreement between the experimental and modelled results. The values of velocity and density agreed within 0.5%. The spacing of parallel resonant frequencies could also be closely matched between the experiment and the simulation. Under these conditions, the value of kt 2 of the piezoelectric film was inferred from the model.","PeriodicalId":6355,"journal":{"name":"2007 IEEE Ultrasonics Symposium Proceedings","volume":"29 1","pages":"1437-1440"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80854857","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

P2I-5 Enhanced Finite Element Scheme for Non-Linear Piezoelectricity 非线性压电特性的改进有限元格式

2007 IEEE Ultrasonics Symposium Proceedings Pub Date : 2007-12-26 DOI: 10.1109/ULTSYM.2007.427

M. Kaltenbacher, B. Kaltenbacher, T. Hegewald, R. Lerch

引用次数: 0