2016 IEEE International Ultrasonics Symposium (IUS)最新文献

Coupling of wideband impulses generated by granular chains into liquids for biomedical applications 由颗粒链产生的宽带脉冲耦合到生物医学应用的液体中

2016 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2019-02-05 DOI: 10.1109/ULTSYM.2016.7728481

S. Harput, S. Freear, P. Gélat, N. Saffari, Jia Yang, O. Akanji, P. Thomas, D. Hutchins

{"title":"Coupling of wideband impulses generated by granular chains into liquids for biomedical applications","authors":"S. Harput, S. Freear, P. Gélat, N. Saffari, Jia Yang, O. Akanji, P. Thomas, D. Hutchins","doi":"10.1109/ULTSYM.2016.7728481","DOIUrl":"https://doi.org/10.1109/ULTSYM.2016.7728481","url":null,"abstract":"An ultrasonic transducer technology to generate wideband impulses using a one-dimensional chain of spheres was previously presented. The Hertzian contact between the spheres causes the nonlinearity of the system to increase, which transforms high amplitude narrowband sinusoidal input into a train of wideband impulses. Generation of short duration ultrasonic pulses is desirable both in diagnostic and therapeutic ultrasound. Nevertheless, the biggest challenge in terms of adaptation to biomedical ultrasound is the coupling of the ultrasonic energy into biological tissue. An analytical model was created to address the coupling issue. Effect of the matching layer was modelled as a flexible thin plate clamped from the edges. Model was verified against hydrophone measurements. Different coupling materials, such as glass, aluminium, acrylic, silicon rubber, and vitreous carbon, was analysed with this model. Results showed that soft matching layers such as acrylic and rubber inhibit the generation of higher order harmonics. Between the hard matching materials, vitreous carbon achieved the best results due to its acoustic impedance.","PeriodicalId":124339,"journal":{"name":"2016 IEEE International Ultrasonics Symposium (IUS)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126753488","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

Automated in-plane visualization of steep needles from 3D ultrasound data volumes 基于三维超声数据量的陡针平面内自动可视化

2016 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2016-11-03 DOI: 10.1109/ULTSYM.2016.7728402

Arash Pourtaherian, Nenad Mihajlovic, S. Zinger, H. Korsten, P. D. De with, Jinfeng Huang, G. Ng

{"title":"Automated in-plane visualization of steep needles from 3D ultrasound data volumes","authors":"Arash Pourtaherian, Nenad Mihajlovic, S. Zinger, H. Korsten, P. D. De with, Jinfeng Huang, G. Ng","doi":"10.1109/ULTSYM.2016.7728402","DOIUrl":"https://doi.org/10.1109/ULTSYM.2016.7728402","url":null,"abstract":"During ultrasound-guided needle interventions, low signal-to-noise ratio and poor needle visibility limit the performance of automated detection systems. This becomes even more challenging when the needle is inserted at higher angles with respect to the ultrasound probe. For very large insertion angles, the needle becomes virtually invisible in the ultrasound data and medical specialists need to find the needle indirectly either from out-of-plane or in-plane views. In this paper, we propose a novel method to automatically detect steep needles in 3D ultrasound data and visualize its 2D in-plane view to the medical specialist. Our method exploits indirect information regarding the presence of a needle in the volume by examining the shadow traces of structures. The proposed algorithm successfully detects the needle plane with high accuracy for all the ten measured datasets. Furthermore, the full-length needle and its tip are always visible in the extracted scan planes. The proposed method is efficient and robust to noise and artifacts, thereby strongly supporting the clinical intervention and eliminating the need for external tracking devices.","PeriodicalId":124339,"journal":{"name":"2016 IEEE International Ultrasonics Symposium (IUS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130491929","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

Airborne broad-beam emitter from a capacitive transducer and a cylindrical structure 由电容式换能器和圆柱形结构构成的机载宽波束发射器

2016 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2016-11-03 DOI: 10.1109/ULTSYM.2016.7728416

F. Guarato, G. B. de Lima, J. Windmill, A. Gachagan

引用次数: 2

Effects of perfusion and vascular architecture on contrast dispersion: Validation in ex-vivo porcine liver under machine perfusion 灌注和血管结构对造影剂弥散的影响:机器灌注下离体猪肝的验证

2016 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2016-11-03 DOI: 10.1109/ULTSYM.2016.7728488

S. Turco, C. Keravnou, R. V. van Sloun, H. Wijkstra, M. Averkiou, M. Mischi

{"title":"Effects of perfusion and vascular architecture on contrast dispersion: Validation in ex-vivo porcine liver under machine perfusion","authors":"S. Turco, C. Keravnou, R. V. van Sloun, H. Wijkstra, M. Averkiou, M. Mischi","doi":"10.1109/ULTSYM.2016.7728488","DOIUrl":"https://doi.org/10.1109/ULTSYM.2016.7728488","url":null,"abstract":"Dynamic contrast enhanced ultrasound (DCE-US) enables imaging of cancer angiogenesis by quantification of perfusion and dispersion. Although increased perfusion may be found in areas of active angiogenesis due to increased demands for blood supply, decreased perfusion may be caused by the decreased efficiency and functionality, typical of cancer angiogenic microvasculature. Contrast dispersion, mainly determined by the flow profile in large vessels and by the multipath trajectories in the microvasculature, may thus represent a suitable alternative to characterize cancer angiogenesis. Based on a model of the contrast transport kinetics as a convective-dispersion process, several DCE-US methods have been proposed estimating dispersion for characterization of cancer angiogenic vasculature. Although dispersion imaging has shown promising in a clinical context, its physical link with variations in flow and vascular architecture has never been shown. The objective of this work is thus to investigate the influence of flow and underlying vascular architecture on the estimation of dispersion in an ex-vivo machine-perfused pig liver.","PeriodicalId":124339,"journal":{"name":"2016 IEEE International Ultrasonics Symposium (IUS)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124518099","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

Automatic B-line detection in paediatric lung ultrasound 小儿肺超声b线自动检测

2016 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2016-11-03 DOI: 10.1109/ULTSYM.2016.7728620

N. Anantrasirichai, M. Allinovi, W. Hayes, A. Achim

引用次数: 14

Progress towards a multi-modal capsule endoscopy device featuring microultrasound imaging 超声多模态胶囊内窥镜装置的研究进展

2016 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2016-11-03 DOI: 10.1109/ULTSYM.2016.7728692

H. Lay, Y. Qiu, M. Al-Rawhani, J. Beeley, R. Poltarjonoks, V. Seetohul, D. Cumming, S. Cochran, G. Cummins, M. Desmulliez, M. Wallace, S. Trolier-McKinstry, R. McPhillips, B. Cox, C. Démoré

{"title":"Progress towards a multi-modal capsule endoscopy device featuring microultrasound imaging","authors":"H. Lay, Y. Qiu, M. Al-Rawhani, J. Beeley, R. Poltarjonoks, V. Seetohul, D. Cumming, S. Cochran, G. Cummins, M. Desmulliez, M. Wallace, S. Trolier-McKinstry, R. McPhillips, B. Cox, C. Démoré","doi":"10.1109/ULTSYM.2016.7728692","DOIUrl":"https://doi.org/10.1109/ULTSYM.2016.7728692","url":null,"abstract":"Current clinical standards for endoscopy in the gastrointestinal (GI) tract combine high definition optics and ultrasound imaging to view the lumen superficially and through its thickness. However, these instruments are limited to the length of an endoscope and the only clinically available, autonomous devices able to travel the full length of the GI tract easily offer only video capsule endoscopy (VCE). Our work seeks to overcome this limitation with a device (“Sonopill”) for multimodal capsule endoscopy, providing optical and microultrasound (μUS) imaging and supporting sensors1.μUS transducers have been developed with multiple piezoelectric materials operating across a range of centre frequencies to study viability in the GI tract. Because of the combined constraints of μUS imaging and the low power / heat tolerance of autonomous devices, a hybrid approach has been taken to the transducer design, with separate transmit and receive arrays allowing multiple manufacturing approaches to maximise system efficiency. To explore these approaches fully, prototype devices have been developed with PVDF, high-frequency PZT and PMN-PT composites, and piezoelectric micromachined ultrasonic transducer arrays. Test capsules have been developed using 3D printing to investigate issues including power consumption, heat generation / dissipation, acoustic coupling, signal strength and capsule integrity. Because of the high functional density of the electronics in our proposed system, application specific integrated circuits (ASICs) have been developed to realise the ultrasound transmit and receive circuitry along with white-light and autofluorescence imaging with singlephoton avalanche detectors (SPADs). The ultrasound ASIC has been developed and the SPAD electronics and optical subsystem have been validated experimentally. The functionality of various transducer materials.","PeriodicalId":124339,"journal":{"name":"2016 IEEE International Ultrasonics Symposium (IUS)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123730146","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: 14

Fast ultrasonic phased array inspection of complex geometries delivered through robotic manipulators and high speed data acquisition instrumentation 快速超声相控阵检测复杂的几何形状传递通过机器人操纵和高速数据采集仪器

2016 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2016-11-03 DOI: 10.1109/ULTSYM.2016.7728746

C. Mineo, C. Macleod, M. Morozov, S. Pierce, T. Lardner, R. Summan, Jonathan Powell, P. Mccubbin, Coreen McCubbin, Gavin Munro, Scott Paton, David Watson, D. Lines

{"title":"Fast ultrasonic phased array inspection of complex geometries delivered through robotic manipulators and high speed data acquisition instrumentation","authors":"C. Mineo, C. Macleod, M. Morozov, S. Pierce, T. Lardner, R. Summan, Jonathan Powell, P. Mccubbin, Coreen McCubbin, Gavin Munro, Scott Paton, David Watson, D. Lines","doi":"10.1109/ULTSYM.2016.7728746","DOIUrl":"https://doi.org/10.1109/ULTSYM.2016.7728746","url":null,"abstract":"Performance of modern robotic manipulators has enabled research and development of fast automated non-destructive testing (NDT) systems for complex geometries. This paper presents recent outcomes of work aimed at removing the bottleneck due to data acquisition rates, to fully exploit the scanning speed of modern 6-DoF manipulators. State of the art ultrasonic instrumentation has been integrated into a large robot cell to enable fast data acquisition, high scan resolutions and accurate positional encoding. A fibre optic connection between the ultrasonic instrument and the server computer enables data transfer rates up to 1.6GB/s. Multiple data collection methods are compared. Performance of the integrated system allows traditional ultrasonic phased array scanning as well as full matrix capture (FMC). In FMC configuration, linear scan speeds up to 156mm/s with 64 pulses per frame are achieved - this speed is only constrained by the acoustic wave propagation in the component. An 8x increase of the speed (up to 1.25m/s) can be achieved using multiple transmission elements, reaching the physical limits for acceptable acoustic alignment of transmission and reception paths. Scan results, relative to a 1.2m × 3m carbon fibre sample, are presented.","PeriodicalId":124339,"journal":{"name":"2016 IEEE International Ultrasonics Symposium (IUS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125802752","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: 26

A deterministic method for particle sorting by dynamic acoustic fields 一种利用动态声场进行粒子分选的确定性方法

2016 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2016-11-03 DOI: 10.1109/ULTSYM.2016.7728638

G. Simon, M. Andrade, D. Roolvink, P. Cormack, M. Riehle, A. Bernassau

引用次数: 1

Influence of surrounding tissue on 3D abdominal aortic elastography 周围组织对腹主动脉三维弹性成像的影响

2016 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2016-11-01 DOI: 10.1109/ULTSYM.2016.7728758

N. Petterson, E. V. van Disseldorp, F. N. van de Vosse, M. V. van Sambeek, R. Lopata

引用次数: 0

High temperature performance of PbTiO3/BaTiO3 ultrasonic transducer PbTiO3/BaTiO3超声换能器的高温性能

2016 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2016-11-01 DOI: 10.1109/ULTSYM.2016.7728409

Keisuke Kimoto, Taiga Kibe, Makiko Kobayashi

{"title":"High temperature performance of PbTiO3/BaTiO3 ultrasonic transducer","authors":"Keisuke Kimoto, Taiga Kibe, Makiko Kobayashi","doi":"10.1109/ULTSYM.2016.7728409","DOIUrl":"https://doi.org/10.1109/ULTSYM.2016.7728409","url":null,"abstract":"Ultrasonic transducers made by sol-gel composite materials have been developed for high temperature continuous monitoring applications. PbTiO3 (PT)/ Pb(Zr,Ti)O3 (PZT) sol-gel composite ultrasonic transducers have high temperature durability and high sensitivity from room temperature (RT) to 300 °C. However, poling of PT/PZT is difficult because of high coercive field of PT and high temperature poling process is required. In recent experiments, PT/BaTiO3 (BT) was successfully poled at RT and it showed reasonable signal strength at RT, though high temperature durability test was not performed yet. In this study, thin and thick PT/BT sol-gel composite films were fabricated onto titanium substrates and high temperature durability test was carried out from for these samples. As a result, thin PT/BT film showed clear multiple reflected echoes from the bottom surface of titanium substrate with reasonable signal amplitude and signal to noise ratio (SNR) from RT to 300 °C. The degradation of signal amplitude was not observed from RT to 300 °C. Rather, the signal amplitude was increased along with rising of hot plate temperature. Thick PT/BT film poled by high temperature corona poling showed lowest signal amplitude among PT/BT films and the degradation of signal amplitude was observed from RT to 300 °C. However, thick PT/BT film poled by pulse poling at RT showed highest signal amplitude among PT/BT films from RT to 300 °C.","PeriodicalId":124339,"journal":{"name":"2016 IEEE International Ultrasonics Symposium (IUS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125347246","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