2002 IEEE Ultrasonics Symposium, 2002. Proceedings.最新文献_第4页

Coupled resonator filters 耦合谐振滤波器

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-10-08 DOI: 10.1109/ULTSYM.2002.1193543

K. Lakin

引用次数: 72

Surface micromachined BAW resonators based on AlN 基于AlN的表面微加工BAW谐振器

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-10-08 DOI: 10.1109/ULTSYM.2002.1193560

R. Lanz, P. Carazzetti, P. Muralt

引用次数: 19

Vessel wall tracking based on the modified autocorrelation estimator 基于改进自相关估计的血管壁跟踪

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-10-08 DOI: 10.1109/ULTSYM.2002.1192645

S. Inge Rabben, P. Segers, J. De Backer, J. De Sutter, P. Verdonck, T. Gillebert

{"title":"Vessel wall tracking based on the modified autocorrelation estimator","authors":"S. Inge Rabben, P. Segers, J. De Backer, J. De Sutter, P. Verdonck, T. Gillebert","doi":"10.1109/ULTSYM.2002.1192645","DOIUrl":"https://doi.org/10.1109/ULTSYM.2002.1192645","url":null,"abstract":"In 16 subjects (age 26-74) we recorded radio-frequency (RF) data of the Carotid artery with a Vivid7 scanner (GE Vingmed Ultrasound, Horten, Norway) and Carotid diameters with WallTrack (Pie Medical, Maastricht, The Netherlands). The RF data were stored as complex demodulated radio-frequency data (IQ data) and transferred to a PC for estimation of diameter curves. For the prototype system, diameter curves are derived using a modified autocorrelation method, in contrast to Walltrack where the complex cross-correlation method is applied. For all datasets, 2-5 beats were averaged to calculate representative one-cycle curves. The diameter distension /spl Delta/D as obtained with both systems was in the range 0.27-0.71 mm, and was highly correlated (r = 0.91, p < 0.002, y = 0.99x + 0.03) with a mean difference of -0.03 mm and limits of agreement (mean difference /spl plusmn/ 2*SD of the differences) of -0.15-0.09 mm. The relative distension /spl Delta/D/D ranged from 3.5 to 11.1% and had a correlation coefficient of r = 0.92 (p < 0.002, y = 0.94x + 0.75). The mean difference of /spl Delta/D/D was -0.4%, and the limits of agreement were -2.2-1.4%. In conclusion, this study indicates that it is adequate to use the modified autocorrelation method for vessel wall tracking.","PeriodicalId":378705,"journal":{"name":"2002 IEEE Ultrasonics Symposium, 2002. Proceedings.","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129009635","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: 5

New imaging method using ultrasonic velocity change caused by light absorption 利用光吸收引起超声速度变化的新成像方法

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-10-08 DOI: 10.1109/ULTSYM.2002.1192638

H. Horinaka, T. Iwade, Y. Kanetaka, K. Wada, T. Matsunaka

引用次数: 0

Design of SAW amplifier with distributed semiconductor transistor 分布式半导体晶体管SAW放大器的设计

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-10-08 DOI: 10.1109/ULTSYM.2002.1193397

Y. Aoki, H. Yoshida, K. Koh, C. Kaneshiro, K. Hohkawa

引用次数: 0

A layered SAW device based on ZnO/LiTaO/sub 3/ for liquid media sensing applications 一种基于ZnO/LiTaO/ sub3 /的液体介质传感层状SAW器件

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-10-08 DOI: 10.1109/ULTSYM.2002.1193449

D. Powell, K. Kalantar-zadeh, S. Ippolito, W. Wlodarski

引用次数: 26

A theoretical investigation of ultrasonic transducer design for measurement of skin 皮肤测量用超声换能器设计的理论研究

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-10-08 DOI: 10.1109/ULTSYM.2002.1192527

Y. Estanbouli, G. Hayward, J. Barbenel

引用次数: 1

Aperture design analysis for vector flow imaging 矢量流成像孔径设计分析

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-10-08 DOI: 10.1109/ULTSYM.2002.1192584

R. F. Kerr, M.E. Anderson

{"title":"Aperture design analysis for vector flow imaging","authors":"R. F. Kerr, M.E. Anderson","doi":"10.1109/ULTSYM.2002.1192584","DOIUrl":"https://doi.org/10.1109/ULTSYM.2002.1192584","url":null,"abstract":"We present the results of a study exploring the upper velocity limit of vector flow estimation with Heterodyned Spatial Quadrature. Since this is highly dependent on apodization, we investigated a set of apodization windows designed to explore means of extending the practical velocity range. Heterodyned Spatial Quadrature (HSQ) is a recently described vector flow technique that has been shown to provide accurate flow estimates in both the axial and lateral directions. The complex PSF created by this technique induces a modulation in the received echo of a scatterer traversing the resolution volume at a frequency proportional to the scatterer lateral velocity. We measure the rate of phase change of this modulation to provide an estimate of the lateral flow velocity component. The technique is extendible to 3D vector flow estimation with a 2D array. We expect lateral tracking methods in general to be limited by a number of factors including the PSF beam width and the system amplitude sensitivity. Using a Siemens Elegra ultrasound scanner with a 7.5 MHz linear array, we simulated flow up to 405 /spl mu/m per step in a tissue-mimicking phantom, corresponding to velocities up to 4.05 m/sec for a PRF of 10 kHz, at Doppler angles of 60/spl deg/ and 90/spl deg/. We estimated lateral velocities to within 5% relative bias up to 315 cm/sec in an f/2 geometry at a 90/spl deg/ Doppler angle. The spatial quadrature receive aperture utilized a bi-lobed Blackman apodization with a width of 1/2D, where D is the full width of the array. Computer simulations of the system under similar conditions produced lateral velocity estimates up to 303 cm/sec. As expected, the maximum estimable velocity scales with focal depth. In simulations, the same aperture estimated flow velocities up to 672 cm/sec at a focal depth of 75 mm, representing an f/5 geometry.","PeriodicalId":378705,"journal":{"name":"2002 IEEE Ultrasonics Symposium, 2002. Proceedings.","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121198488","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

Study on suppression mechanism of cancer cells proliferation by ultrasound exposure for minimally invasive cancer treatment 超声照射对肿瘤微创治疗中癌细胞增殖抑制机制的研究

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-10-08 DOI: 10.1109/ULTSYM.2002.1192572

A. Watanabe, T. Takatera, T. Sato, S. Takeuchi, H. Nishimura, N. Kawashima

引用次数: 2

Ultrasonic evaluation of thermally shocked Cr/sub 3/C/sub 2//Al/sub 2/O/sub 3/ 热冲击Cr/sub - 3/C/sub - 2/ Al/sub - 2/O/sub - 3/的超声评价

2002 IEEE Ultrasonics Symposium, 2002. Proceedings. Pub Date : 2002-10-08 DOI: 10.1109/ULTSYM.2002.1193536

Shih-Jeh Wu, C. Jeng, Jow-Lay Huang

引用次数: 0