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Speckle Reduction with Improved Resolution in Ultrasound Images 提高超声图像分辨率的斑点减少
IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31628
P. Shankar, V. Newhouse
{"title":"Speckle Reduction with Improved Resolution in Ultrasound Images","authors":"P. Shankar, V. Newhouse","doi":"10.1109/T-SU.1985.31628","DOIUrl":"https://doi.org/10.1109/T-SU.1985.31628","url":null,"abstract":"La composition spatiale et la composition frequentielle c'est-a-dire l'observation d'une cible a partir de differents lieux dans l'espace ou avec differentes frequences et en combinant les echos independant statistiquement pour produire une image composee ont ete utilisees pour reduire l'effet de speckle. Amelioration du rapport signal sur bruit mais reduction de la resolution. On compose alors avec des signaux correles spatialement c'est-a-dire des faisceaux se recouvrant pour la composition spatiale ou des bandes passantes se recouvrant pour la composition frequentielle","PeriodicalId":371797,"journal":{"name":"IEEE Transactions on Sonics and Ultrasonics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127296349","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: 51
Plane-Scanning Reflection-Diffraction Tomography 平面扫描反射衍射层析成像
IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31631
Cong-Qing Lan, G. Flesher, G. Wade
{"title":"Plane-Scanning Reflection-Diffraction Tomography","authors":"Cong-Qing Lan, G. Flesher, G. Wade","doi":"10.1109/T-SU.1985.31631","DOIUrl":"https://doi.org/10.1109/T-SU.1985.31631","url":null,"abstract":"Absrmcr-Consideration is given to image reconstruction when an object is irradiated by a traveling plane wave and a receiver scans the field in a fixed data plane. Obtaining data from a sufficient number of different input plane waves, computer reconstruction of a tomographic image can be carried out. When reflection data is used, simple Fourier reconstruction of some images suffers because of the lack of low frequency data. To demonstrate the technique, simhlation data for a simple object is used to reconstuct an image.","PeriodicalId":371797,"journal":{"name":"IEEE Transactions on Sonics and Ultrasonics","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129808153","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: 4
Performance of a Linear Array Transducer of Vinylidene Fluoride Trifluoroethylene Copolymer 偏氟乙烯-三氟乙烯共聚物线性阵列换能器的性能
IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31632
K. Kimura, N. Hashimoto, H. Ohigashi
{"title":"Performance of a Linear Array Transducer of Vinylidene Fluoride Trifluoroethylene Copolymer","authors":"K. Kimura, N. Hashimoto, H. Ohigashi","doi":"10.1109/T-SU.1985.31632","DOIUrl":"https://doi.org/10.1109/T-SU.1985.31632","url":null,"abstract":"A 5-MHz 64-element linear array transducer composed of vinylidene fluoride and trifluoroethylene copolymer (P(VDF-TrFE)) has been developed and its performance studied. The transducer has high resolution in both lateral and depth directions and has energy conver- sion efficiency high enough to be used for practical applicalions. The electroacoustic conversion loss (CL) is 6 dB at 5 MHz, and the pulse- echo ring-down period at -20 dB is 1.0 PS. These experimental values are in good agreement with theoretical ones calculated with Mason's equivalent circuit in which the internal losses of a piezoelectric material are taken into account. The ultrasonic field distribution from the array is also in good agreement with the simulations obtained using a numer- ical Huygens' wavelet approach for pulse waves. The maximum cross coupling voltage between the nearest neighbor elements is len percent of the driving voltage. This degree of cross coupling does not appreci- ably degrade the ultrasonic field distribution. A medical echogram taken with this transducer is shown. Its lateral and depth resolutions nn the focal plane are 1.5 mm and 0.75 mm, respectively.","PeriodicalId":371797,"journal":{"name":"IEEE Transactions on Sonics and Ultrasonics","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117035433","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: 37
On the Interaction of Temperature Gradients with Surface Wave Propagation in Anisotropic Solids 各向异性固体中温度梯度与表面波传播的相互作用
IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31634
B. Sinha
{"title":"On the Interaction of Temperature Gradients with Surface Wave Propagation in Anisotropic Solids","authors":"B. Sinha","doi":"10.1109/T-SU.1985.31634","DOIUrl":"https://doi.org/10.1109/T-SU.1985.31634","url":null,"abstract":"Reponse thermique transitoire de circuits a ondes acoustiques de surface soumis a des variations de temperatures","PeriodicalId":371797,"journal":{"name":"IEEE Transactions on Sonics and Ultrasonics","volume":"499 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123351946","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: 11
Additional Comments on IEEE Standard on Piezoelectricity 176-1978 对IEEE压电标准176-1978的补充评论
IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31639
A. Meitzler
{"title":"Additional Comments on IEEE Standard on Piezoelectricity 176-1978","authors":"A. Meitzler","doi":"10.1109/T-SU.1985.31639","DOIUrl":"https://doi.org/10.1109/T-SU.1985.31639","url":null,"abstract":"","PeriodicalId":371797,"journal":{"name":"IEEE Transactions on Sonics and Ultrasonics","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115908574","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: 10
Analysis of Acoustooptic Diffraction by Adjacent Ultrasonic Beams Using Multiple Plane-Wave Scattering Techniques 利用多平面波散射技术分析相邻超声光束的声光衍射
IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31635
Ting-Chung Poon, P. Banerjee, Monish R. Chatterjee
{"title":"Analysis of Acoustooptic Diffraction by Adjacent Ultrasonic Beams Using Multiple Plane-Wave Scattering Techniques","authors":"Ting-Chung Poon, P. Banerjee, Monish R. Chatterjee","doi":"10.1109/T-SU.1985.31635","DOIUrl":"https://doi.org/10.1109/T-SU.1985.31635","url":null,"abstract":"Abstmct-Plane-wave multiple-scattering theory is used to analyze scattering in the Raman-Nath regime for adjacent ultrasonic beams of frequency ratio 1:m. The variation of the scattered intensities is obtained numerically as a function of the phase difference between the beams for the case m = 2. Results are compared with the work of earlier investigators.","PeriodicalId":371797,"journal":{"name":"IEEE Transactions on Sonics and Ultrasonics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117065483","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
Terms and Definitions for Surface Acoustic Wave Devices 表面声波装置的术语和定义
IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31622
E. Mariani
{"title":"Terms and Definitions for Surface Acoustic Wave Devices","authors":"E. Mariani","doi":"10.1109/T-SU.1985.31622","DOIUrl":"https://doi.org/10.1109/T-SU.1985.31622","url":null,"abstract":"T HE Surface Acoustic Wave Devices Standards Subcommittee, which was formed in early 1982, accepted the long-term task of preparing and maintaining a comprehensive new standard for surface acoustic wave (SAW) devices. As a first step in preparing this document, an extensive list of SAW devices terms and definitions has been prepared by the dedicated efforts of the subcommittee members with assistance and comment from many other members of the technical community. This completed list was then presented as a poster paper during the 1983 Ultrasonics Symposium for further dissemination and comment. This listing of terms and definitions for surface wave devices is consistent with the definitions prepared by the International Electrochemical Commission, document 49 (Japan) 74A, dated February 1984, of the Technical Committee no. 49 (Piezoelectric Devices for Frequency Control and Selection). Commonality with the IEC definitions was achieved where possible. The complete list is presented below for additional comment by readers of IEEE TRANSACTIONS O SONICS AND ULTRASONICS prior to formal submission to the IEEE Standards Committee.","PeriodicalId":371797,"journal":{"name":"IEEE Transactions on Sonics and Ultrasonics","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114317653","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
The Frequency of a Piezoelectric Quartz Resonator Subject to a Lateral Temperature Gradient 受侧向温度梯度影响的压电石英谐振器的频率
IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31638
C. K. Hruska, Hu Hui
{"title":"The Frequency of a Piezoelectric Quartz Resonator Subject to a Lateral Temperature Gradient","authors":"C. K. Hruska, Hu Hui","doi":"10.1109/T-SU.1985.31638","DOIUrl":"https://doi.org/10.1109/T-SU.1985.31638","url":null,"abstract":"Absfmcf-The series resonance frequency of one thickness mode of a doubly rotated square quartz plate resonator was observed while the resonator was exposed to various steady lateral temperature gradients between i3 .8 X Id \" C h . The gradients were generated by keeping two opposite edges of the resonator plate at unequal temperatures set anywhere between -40 and 50°C. When a temperature gradient w a s created by maintaining the ends of the resonator at different temperatures, the approximate associated frequency shift was found to be predictable by the ordinary frequency-temperature curve of the resonator applied in turn to the starting uniform temperature and to the averaged temperature.of the resonator edges. The errors in these frequency shift predictions were found to be 4.5 f 3.5 percent on the average. It was also concluded tentatively that the size of the frequency shift caused by the temperature gradient depends on the gradient direction.","PeriodicalId":371797,"journal":{"name":"IEEE Transactions on Sonics and Ultrasonics","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130528592","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
Velocity Profile Reconstruction Using Ultrafast Spectral Analysis of Doppler Ultrasound 利用超快谱分析重建多普勒超声速度剖面
IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31630
P. Tortoli, G. Maines, C. Atzeni
{"title":"Velocity Profile Reconstruction Using Ultrafast Spectral Analysis of Doppler Ultrasound","authors":"P. Tortoli, G. Maines, C. Atzeni","doi":"10.1109/T-SU.1985.31630","DOIUrl":"https://doi.org/10.1109/T-SU.1985.31630","url":null,"abstract":"Abstmct-An ultrasound pulse Doppler system is discussed, capable of performing real time spectral analysis of data originating from a number of sample volumes. The use of a surface-acoustic-wave-based ultrafast spectrum analyzer allows for a large amount of Doppler data to be processed in a time equal to a few tens of microseconds for each equivalent channel. Sonograms comparable to those obtained in single gate-fast Fourier transform-based-Doppler systems can thus be simultaneously presented, showing the velocity distribution in different sample volumes as a function of time. Alternately, the instantaneous velocity profile can be mapped as a function of depth, thus allowing for the possibility of bidimensional imaging. A prototype flowmeter capable of processing Doppler data from 32 range cells in real time is described and preliminary results obtained in virro under simulated flow conditions are presented.","PeriodicalId":371797,"journal":{"name":"IEEE Transactions on Sonics and Ultrasonics","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125120548","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: 13
Variance Reduction for Ultrasonic Attenuation Measurements from Backscatter in Biological Tissue 生物组织中后向散射超声衰减测量的方差减小
IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31626
F. Foster, P. Guttorp, E. L. Gow
{"title":"Variance Reduction for Ultrasonic Attenuation Measurements from Backscatter in Biological Tissue","authors":"F. Foster, P. Guttorp, E. L. Gow","doi":"10.1109/T-SU.1985.31626","DOIUrl":"https://doi.org/10.1109/T-SU.1985.31626","url":null,"abstract":"Absfracf-Various averaging techniques can be used to reduce the variability of frequency-dependent attenuation estimates that are based on the power spectral density of acoustic backscatter signals from biological tissue. Three variance reduction methods are compared in terms of a consistently defined confidence interval. It is shown that the attenuation estimate based on averaged spectra from two C-planes is superior to the averaged attenuation estimate based on the pairs of spectra from individual A-lines. The superior technique yields results of equivalent accuracy with approximately 40 percent less data. This method is also shown to be asymptotically optimal in the sense of maximum likelihood estimation.","PeriodicalId":371797,"journal":{"name":"IEEE Transactions on Sonics and Ultrasonics","volume":"C-27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126480240","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
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