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IEEE 1985 Ultrasonics Symposium最新文献

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The Method of Determining ktand Qm, for Low Q Piezoelectric Materials 低Q压电材料ktqm的测定方法
IEEE 1985 Ultrasonics Symposium Pub Date : 1900-01-01 DOI: 10.1109/ULTSYM.1985.198584
S. Saitoh, H. Honda, N. Kaneko, M. Izumi, S. Suzuki
{"title":"The Method of Determining ktand Qm, for Low Q Piezoelectric Materials","authors":"S. Saitoh, H. Honda, N. Kaneko, M. Izumi, S. Suzuki","doi":"10.1109/ULTSYM.1985.198584","DOIUrl":"https://doi.org/10.1109/ULTSYM.1985.198584","url":null,"abstract":"This paper reports two new methods that are effective to know the accurate values of the electromechanical coupling factor (kt) and the mechanical Q (Qm) for low Q materials. In order to realize the required sensitivity and bandwidth of an ultrasonic probe, it is necessary to know the accurate values of kt and Q of a material. about twice larger than the exact value when applying the usual resonant-antiresonant method to these materials. The fundamental concept or' the new methods is to derive these constants by comparing certain physical values with measured and calculated values. These methods were applied to several ?iezoelectric materials. It has been found that more reasonable values than those from the conventional method can be obtained. However, the value o? kt becomes","PeriodicalId":240321,"journal":{"name":"IEEE 1985 Ultrasonics Symposium","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124452737","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: 16
Unwarping the Pulse Echo Wavetrain for High Resolution Imaging 用于高分辨率成像的脉冲回波波列解调
IEEE 1985 Ultrasonics Symposium Pub Date : 1900-01-01 DOI: 10.1109/ULTSYM.1985.198624
D. Fitting
{"title":"Unwarping the Pulse Echo Wavetrain for High Resolution Imaging","authors":"D. Fitting","doi":"10.1109/ULTSYM.1985.198624","DOIUrl":"https://doi.org/10.1109/ULTSYM.1985.198624","url":null,"abstract":"Normal pulse echo ultrasound images are a straight line, constant wavespeed mapping of the echo wavetrain on to an image plane. However, the path the ultrasound beam actually traverses is curved because of refraction in the imaged volume [I]. Additionally, the speed-of-sound in this volume is usually spatially variant. The procedure for unwarping the pulse echo image begins with determining the spatial variations in speed-of-sound in the imaged volume. The speed distribution may be known or can be measured using high resolution ultrasonic computed tomography (UCT). Next, rays are traced from the pulse echo transducer position through the volume under investigation. Finally, the measured echo wavetrain is mapped along the curved ray with corrections being made for the wavespeed along the ray path. The result is an image with the echoes placed at their correct origin.","PeriodicalId":240321,"journal":{"name":"IEEE 1985 Ultrasonics Symposium","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114976453","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
Annular and Sector Phased Array Applicators for Ultrasound Hyperthermia 超声热疗的环形和扇形相控阵应用器
IEEE 1985 Ultrasonics Symposium Pub Date : 1900-01-01 DOI: 10.1109/ULTSYM.1985.198651
C. Cain, S. Umemura
{"title":"Annular and Sector Phased Array Applicators for Ultrasound Hyperthermia","authors":"C. Cain, S. Umemura","doi":"10.1109/ULTSYM.1985.198651","DOIUrl":"https://doi.org/10.1109/ULTSYM.1985.198651","url":null,"abstract":"","PeriodicalId":240321,"journal":{"name":"IEEE 1985 Ultrasonics Symposium","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123208678","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
Lightweight Ultrasonic Acquisition and Recording System 轻型超声采集和记录系统
IEEE 1985 Ultrasonics Symposium Pub Date : 1900-01-01 DOI: 10.1109/ULTSYM.1985.198568
R. Martinez Ona, J. Vazquez, J.B. Perez Prat
{"title":"Lightweight Ultrasonic Acquisition and Recording System","authors":"R. Martinez Ona, J. Vazquez, J.B. Perez Prat","doi":"10.1109/ULTSYM.1985.198568","DOIUrl":"https://doi.org/10.1109/ULTSYM.1985.198568","url":null,"abstract":"","PeriodicalId":240321,"journal":{"name":"IEEE 1985 Ultrasonics Symposium","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122023960","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
Prompt Observation of Elastic Resonance Spectra Via the Use of Short Ultrasonic Pulses 利用短超声脉冲快速观测弹性共振谱
IEEE 1985 Ultrasonics Symposium Pub Date : 1900-01-01 DOI: 10.1109/ULTSYM.1985.198677
M. de Billy, G. Quentin, I. Molinero
{"title":"Prompt Observation of Elastic Resonance Spectra Via the Use of Short Ultrasonic Pulses","authors":"M. de Billy, G. Quentin, I. Molinero","doi":"10.1109/ULTSYM.1985.198677","DOIUrl":"https://doi.org/10.1109/ULTSYM.1985.198677","url":null,"abstract":"It has been shown by L.R. Dragonette, S.K. Numrich and L.J. Frank [1,2] that the echo scattered by an elastic body can be considered as t he superposition of the elastic response of the target superimposed to the response o f a rigid body having the same shape. T his result has b eenused to analyse t he insonification of long cylindrical wires by short ultrasonic pulses. We show that the F ourier transform o f the elastic contribution alone g ives directly the resonance spectrum of the cylinder. This method has been checked on wires of different materials the v alues of ka involved were less than 50. The positions of the resonances in ka are in good agreement with theoretical predictions 131 as it will be verified by Regge's trajectories [41.","PeriodicalId":240321,"journal":{"name":"IEEE 1985 Ultrasonics Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129476863","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
Measurement of Ultrasonic Phase Fluctuations Caused by a Plant Cell Using IDT System 利用IDT系统测量植物细胞超声相位波动
IEEE 1985 Ultrasonics Symposium Pub Date : 1900-01-01 DOI: 10.1109/ULTSYM.1985.198642
S. Shiokawa, T. Kikuchi, T. Moriizumi
{"title":"Measurement of Ultrasonic Phase Fluctuations Caused by a Plant Cell Using IDT System","authors":"S. Shiokawa, T. Kikuchi, T. Moriizumi","doi":"10.1109/ULTSYM.1985.198642","DOIUrl":"https://doi.org/10.1109/ULTSYM.1985.198642","url":null,"abstract":"Ultrasonic characteristics of a living plant cell are reported. A highprecision phase detection has been realized by a differential phase measurement system using focussed ultrasonic beams emitted from arched IDTs on a piezoelectric substrate. In the present system , a phase fluctuation of up to 0.1 deg. and the veloicity change larger than 2 mm/sec. can be detected. That plant cell, called Nitella, is well known to exhibit the electrical excitation and plasma streaming phenomena, and is often used for electrophysiological investigations. The phase measurements were made both at the steady states and the electrically excited state in Nitella, and the phase was found to be fluctuated. The fluctuation spectrum was examined by Fourier analysis.","PeriodicalId":240321,"journal":{"name":"IEEE 1985 Ultrasonics Symposium","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128601936","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
Artifacts in Ultrasonic Attenuation Measurements in Tissues 组织超声衰减测量中的伪影
IEEE 1985 Ultrasonics Symposium Pub Date : 1900-01-01 DOI: 10.1109/ULTSYM.1985.198627
D. Yanwu, Sun Yongchen
{"title":"Artifacts in Ultrasonic Attenuation Measurements in Tissues","authors":"D. Yanwu, Sun Yongchen","doi":"10.1109/ULTSYM.1985.198627","DOIUrl":"https://doi.org/10.1109/ULTSYM.1985.198627","url":null,"abstract":"CEIIiiA In this paper, we first ana.ly7.ed the signal receiving system for zeamrcnent of ultrasonic attenuation. ‘Then, using three piezoelectric receivers (with ? iame Lers of 0.6, 5, and 14 mE, respectively), we ;ileasured the ultrasonic attenuation coefficients of hcart, liver, muscle, Kid:iey,and fat of pig in the frequer-cy range 1-6 to study tr.e artifacts due to phase cancellation ef Cec ts in measurements when phas-e sensitive receivers are wed. Exneriiwntal rerults are in accorriance with the analyses. Contributions of the artifacts to the wlues of i?t tenvation c oefficieritF are rsl2ted to the sizes of tt;e receivers. The at t enua t ion-f requencg nlo t c arp 2 Drc ximately straif:ht lines when mall receivers are used. ilhus, to enhance the xensuring accuracy, nhase insezsitive receivers should ?e used.","PeriodicalId":240321,"journal":{"name":"IEEE 1985 Ultrasonics Symposium","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130180724","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
An MSW Tunable Bandpass Filter 一个MSW可调带通滤波器
IEEE 1985 Ultrasonics Symposium Pub Date : 1900-01-01 DOI: 10.1109/ULTSYM.1985.198496
J. Adam
{"title":"An MSW Tunable Bandpass Filter","authors":"J. Adam","doi":"10.1109/ULTSYM.1985.198496","DOIUrl":"https://doi.org/10.1109/ULTSYM.1985.198496","url":null,"abstract":"","PeriodicalId":240321,"journal":{"name":"IEEE 1985 Ultrasonics Symposium","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131057237","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
Confocal Beam Formation for an Oblique Scanning Acoustic Microscope 倾斜扫描声显微镜的共聚焦光束形成
IEEE 1985 Ultrasonics Symposium Pub Date : 1900-01-01 DOI: 10.1109/ULTSYM.1985.198609
C. Cutler, H. Ransom
{"title":"Confocal Beam Formation for an Oblique Scanning Acoustic Microscope","authors":"C. Cutler, H. Ransom","doi":"10.1109/ULTSYM.1985.198609","DOIUrl":"https://doi.org/10.1109/ULTSYM.1985.198609","url":null,"abstract":"Confocal converging non-apertured acoustic beams are desirable in oblique offspecular reflection microscopy and for observing signal intermodulation in microscopy. Our experience has shown that optimal coincidence of focus and axial intersection of the beams requires rather specific choices of dimensional parameters. We have studied acoustic beam formation by analysis and by computation using the Huygens-Fresnel principle and show that confocal operation from a simple solid lens substrate is possible. We also have found that a strong transverse component of field exists in the focal region of highly convergent beams and we believe that the transverse component is important in intermodulation and in understanding Rayleigh wave ineraction.","PeriodicalId":240321,"journal":{"name":"IEEE 1985 Ultrasonics Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130765265","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
Autocalibrating Circuitry for Processing SAW Convolver Outputs 处理SAW卷积器输出的自校准电路
IEEE 1985 Ultrasonics Symposium Pub Date : 1900-01-01 DOI: 10.1109/ULTSYM.1985.198491
J. Fischer
{"title":"Autocalibrating Circuitry for Processing SAW Convolver Outputs","authors":"J. Fischer","doi":"10.1109/ULTSYM.1985.198491","DOIUrl":"https://doi.org/10.1109/ULTSYM.1985.198491","url":null,"abstract":"","PeriodicalId":240321,"journal":{"name":"IEEE 1985 Ultrasonics Symposium","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132265597","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
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