2002 IEEE Ultrasonics Symposium, 2002. Proceedings.最新文献

AlN epitaxial film with atomically flat surface for GHz-band SAW devices 用于ghz波段SAW器件的原子平面AlN外延膜

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-12-01 DOI: 10.1109/ULTSYM.2002.1193370

K. Uehara, H. Nakamura, H. Nakase, K. Tsubouchi

引用次数: 2

Non-cylindrical transmission focusing for large depth of field 非圆柱形传输聚焦大景深

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-12-01 DOI: 10.1109/ULTSYM.2002.1192629

S. Umemura, T. Azuma, Y. Miwa, K. Sasaki, T. Sugiyama, T. Hayashi, H. Kuribara

引用次数: 3

Analysis of transducers arrays from piezoelectric hollow spheres 压电空心球体换能器阵列分析

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-12-01 DOI: 10.1109/ULTSYM.2002.1192518

A. Hladky-Hennion, D. Markley, R. Newnham, R. Meyer, W. Hughes

引用次数: 1

Depth-independent narrow beamwidth 3D ultrasonic image formation technique 与深度无关的窄波束宽度三维超声成像技术

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-12-01 DOI: 10.1109/ULTSYM.2002.1192597

Z. M. Benenson, A. B. Elizarov, T. Yakovleva, W. O’Brien

引用次数: 1

The effect of microbubble concentration on thresholds for tissue damage produced by single bursts of high intensity ultrasound during continuous Optison/spl reg/ infusion 微泡浓度对连续Optison/spl reg/输注过程中单次高强度超声产生的组织损伤阈值的影响

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-12-01 DOI: 10.1109/ULTSYM.2002.1192560

B. C. Tran, Jongbum Soo, J. Fowlkes, C. Cain

引用次数: 3

Moving linear array technique: improved lateral resolution with decreased scan time to form a 3D image 移动线性阵列技术:提高横向分辨率，减少扫描时间，形成三维图像

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-12-01 DOI: 10.1109/ULTSYM.2002.1192614

Z. M. Benenson, A. B. Elizarov, T. Yakovleva, W. O’Brien

引用次数: 1

Layered manufacturing for prototyping of novel transducers 新型换能器原型的分层制造

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-12-01 DOI: 10.1109/ULTSYM.2002.1192484

A. Safari, M. E. Ebrahimi, S. Turcu, A. Hall, R. Brennan, N. M. Hagh

{"title":"Layered manufacturing for prototyping of novel transducers","authors":"A. Safari, M. E. Ebrahimi, S. Turcu, A. Hall, R. Brennan, N. M. Hagh","doi":"10.1109/ULTSYM.2002.1192484","DOIUrl":"https://doi.org/10.1109/ULTSYM.2002.1192484","url":null,"abstract":"Layered Manufacturing (LM) technology has been implemented to prototype novel piezoelectric ceramics and composites for sensor and actuator applications. Piezoelectric actuators in the form of tubes, telescoping, spirals and ovals have been manufactured. Among actuators, spirals have shown giant tangential displacements up to several millimeters at moderate electric field. Multimaterials actuators have also been prototyped to study field-induced strain in these structures. In addition to actuators, piezocomposite sensors with oriented 2-2 and 3-3 composites were prototyped, in which the ceramic phase was oriented with respect to the poling direction. Various piezoelectric properties were measured and calculated. The hydrostatic figure of merit at an orientation angle of 45 degrees was significantly (50-80 times) larger than those of the conventional piezocomposites. Recently, we have fabricated net shape grain-oriented/single crystal components by integration of LM and Templatcd Grain Growth techniques. Grain oriented PMN-PT, bismuth titanate, and lead niobate components were also made using LM feedstock containing small amounts of platelet or needle-like seeds, resulting in improved piezoelectric properties.","PeriodicalId":378705,"journal":{"name":"2002 IEEE Ultrasonics Symposium, 2002. Proceedings.","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124710210","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

Holographic visualization of secondary ultrasonic waves radiated from micro-bubbles 微气泡辐射二次超声波的全息显示

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-12-01 DOI: 10.1109/ULTSYM.2002.1192686

Y. Yamakoshi, Y. Ozawa, N. Masuda

引用次数: 2

Detection and mapping of thermal lesions using dual-mode ultrasound phased arrays 双模超声相控阵热病变的检测与制图

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-12-01 DOI: 10.1109/ULTSYM.2002.1192566

H. Yao, P. Phukpattaranont, E. Ebbini

引用次数: 8

Experimental evaluation of some possible nonlinearity indicators 一些可能的非线性指标的实验评价

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-12-01 DOI: 10.1109/ULTSYM.2002.1192555

T. Bigelow, W. O’Brien

{"title":"Experimental evaluation of some possible nonlinearity indicators","authors":"T. Bigelow, W. O’Brien","doi":"10.1109/ULTSYM.2002.1192555","DOIUrl":"https://doi.org/10.1109/ULTSYM.2002.1192555","url":null,"abstract":"Due to regulatory reasons, the output levels of ultrasound sources for use in medical applications must be known. Currently, this is done by making focal pressure measurements for a very large number of drive voltage amplitudes and then linearly derating the measured pressure levels. In order to reduce calibration times, some have proposed to linearly extrapolate pressures rather than perform direct measurements. However, nonlinear propagation effects corrupt the linear extrapolation and derating procedure. Thus, a reliable indicator of nonlinearity is needed to identify when linear extrapolation/derating would be valid. In this study, eight different nonlinearity indicators were evaluated experimentally in terms of their correspondence to the linear extrapolation error. Spherically focused ultrasound transducers were selected and excited to test the indicators sensitivity to frequency (3 - 8 MHz), f/# (1 and 2), transducer diameter (1.905 and 5.08 cm), pulse duration (1 and 3 cycles), and pulse phase (0/spl deg/ and 180/spl deg/). None of the eight nonlinearity indicators yielded consistent results. The lack of consistency resulted from the competing effects of nonlinear absorption and asymmetric distortion, which have yet to be combined into a unified theory.","PeriodicalId":378705,"journal":{"name":"2002 IEEE Ultrasonics Symposium, 2002. Proceedings.","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133945198","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