2022 IEEE International Ultrasonics Symposium (IUS)最新文献_第7页

XBAR XBAR

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9957805

V. Plessky

{"title":"XBAR","authors":"V. Plessky","doi":"10.1109/IUS54386.2022.9957805","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9957805","url":null,"abstract":"The micro/nano acoustic filters operating at 3 GHz – 7 GHz frequency range with large bandwidth and low loss are currently in demand. Such filters are usually designed as “ladder” circuits connecting resonators with large relative frequency distance between the anti-resonance and resonance and having a few orders impedance difference between them. Ideally, these resonators must be manufacturable with optical lithography, and the filters must tolerate an input power of a few watts. Essential progress been reached nowadays based on vibration modes in thin, submicron, crystalline platelet of strong piezoelectrics, such as lithium niobate (LN). Commercial availability of ion-sliced layers of different cuts of LN transferred on Si, SiC and other substrates opens wonderful possibilities for using materials with desired properties. Compared to SAW, in membranes it is easier to create a more uniform electric field better corresponding to stress distribution in an excited mode and thus providing higher piezo-electric coupling. Therefore, low order Lamb and plate modes, such as S0, SH0, S1, SH1 and A1 - providing the strongest piezo-coupling are of interest. In this paper I will review devices based on laterally excided Lamb mode A1 (so called XBARs) and shear plate resonances (SH1) excited by transversal electric field in periodic system of such resonators (YBARs). The use of suspended cavity membranes allows reaching excellent Q-factor and strong coupling. The device frequency is mainly determined by the membrane thickness and 3GHz–7 GHz can be reached, while maintaining electrode critical dimensions CD >0.5 µm. However, this technology is difficult. The devices are fragile, and their power handling can be limited because of low heat evacuation from the thin LN membrane. Therefore, we will also briefly discuss layered structures when such a membrane is mounted on a substrate - solving part of these problems at the cost of reduced coupling. This technology will inevitably dominate the area of micro-nano acoustic devices for frequencies higher than 3 GHz in the foreseeable future.","PeriodicalId":272387,"journal":{"name":"2022 IEEE International Ultrasonics Symposium (IUS)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132788797","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

Simultaneous Orientation Locking and Translation of Samples with Phased Arrays 用相控阵同时锁定和平移样品

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9958622

M. Korhonen, Denys Iablonskyi, Felix Sundblad, Bruno Wuensch, Axi Holmström, A. Salmi, E. Hæggström

引用次数: 0

Study of the LT/Quartz Bonded SAW Substrate for high performance filter solutions LT/石英键合SAW基板用于高性能滤光剂的研究

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9957591

R. Goto, Keiichi Maki, Hiroyuki Nakamura

{"title":"Study of the LT/Quartz Bonded SAW Substrate for high performance filter solutions","authors":"R. Goto, Keiichi Maki, Hiroyuki Nakamura","doi":"10.1109/IUS54386.2022.9957591","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9957591","url":null,"abstract":"For expanding into various newly allocated frequency bands, high K2, high Q filter solutions are strongly demanded for RF filter modules. Recently, SA W-type devices with bonded wafer structures have been widely studied for achieving high Q, high K2 and excellent TCF. For example, 42YX-LiTaO3 bonded onto Quartz has been studied as a candidate combination to provide high performance filter solutions with high Q, excellent TCF, and a spurious-free clean response. This paper proposes 25YX-LiTaO3 bonded on 70Y90X-Quartz to give high K2, high Q, and good TCF while suppressing spurious transverse modes, without any other special treatment to support piston mode operation. A parametric sweep study for this feature was conducted by piezoelectric simulation. Experimental filters and resonators were fabricated on 25YX-LiTaO3 bonded on 70Y90X-Quartz, and the resulting performance and TCF were evaluated. This paper proposes 25YX-LiTaO3 bonded on 70Y90X-Quartz as a candidate structure for high performance filter solutions. Ladder and DMS-type filter prototypes are demonstrated with excellent TCF performance and clean pass bands free of transverse modes.","PeriodicalId":272387,"journal":{"name":"2022 IEEE International Ultrasonics Symposium (IUS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130902266","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

Ultrasound and Photoacoustic Guided Tissue Temperature Mapping during Ablation Therapies 超声和光声引导消融治疗过程中的组织温度定位

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9957225

Samuel John, N. Maghsoodi, Angad Ghag, L. Kabbani, Yan Yan, M. Mehrmohammadi

{"title":"Ultrasound and Photoacoustic Guided Tissue Temperature Mapping during Ablation Therapies","authors":"Samuel John, N. Maghsoodi, Angad Ghag, L. Kabbani, Yan Yan, M. Mehrmohammadi","doi":"10.1109/IUS54386.2022.9957225","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9957225","url":null,"abstract":"Successful laser ablation treatment procedures require the accurate placement of the ablation catheter tip within the diseased tissue, real-time tissue temperature monitoring, and estimating the heat diffusion from the catheter tip to the surrounding tissues. Poor catheter tip visualization due to ultrasound (US) imaging artifacts, poor contrast, and lack of real-time thermometry and heat diffusion maps lead to unsafe or incomplete treatments. Our previous in vivo animal studies validated the real-time catheter tip tracking and thermometry capabilities of photoacoustic (PA) imaging. During laser ablation studies, the continuous wave (CW) laser light energy exiting the catheter tip is converted into heat and diffused into the surrounding tissue. Using US imaging and tissue classification, it is possible to develop a tissue heat diffusion map. PA measures the temperature at the catheter tip. Therefore, the combination of US and PA imaging can provide real-time tissue temperature maps that could be overlaid over US structural images and can provide effective treatments.","PeriodicalId":272387,"journal":{"name":"2022 IEEE International Ultrasonics Symposium (IUS)","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133315808","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

A Novel Two-element Scanner for High-frequency Ultrasound Imaging 一种用于高频超声成像的新型双单元扫描仪

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9958515

Anudeep Vayyeti, A. Thittai

{"title":"A Novel Two-element Scanner for High-frequency Ultrasound Imaging","authors":"Anudeep Vayyeti, A. Thittai","doi":"10.1109/IUS54386.2022.9958515","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9958515","url":null,"abstract":"This paper presents a novel hybrid two-element scanner (HyTES) for high-frequency ultrasound imaging. The proposed scanner utilizes a combination of a focused and an unfocused high-frequency transducer elements to improve the quality of reconstructed image. An experimental prototype of the proposed scanner is made to serve as proof-of-concept. The scan data obtained from the proposed scheme is beamformed using the recently proposed non-linear beamformer of F-DewMAS, and the results are compared with state-of-the-art monostatic Delay-And-Sum (DAS) and recently proposed Virtual -source-in-front of the transducer with DAS (VS-DAS) beamforming that uses data from only the focused element. As a minor innovation, Virtual Source beamforming is adapted to Delay-Multiply-And-Sum to develop VS-DMAS, which is utilized to reconstruct two element data and the results are compared with other methods. The proposed scanning technology with F-DewMAS beamforming is able improve the image quality by more than 52 % and 63 % in terms of resolution and by more than 44 % and 57 % in terms of CNR and GCNR compared to the recent VS-DAS and monostatic DAS, respectively. Further, the newly proposed VS-DMAS was able to improve resolution and contrast compared to existing methods. However, the performance in terms of the image quality metrics were not as much as obtained with the proposed HyTES. The proposed technology has the potential to improve the image quality without the need for an array, manufacturing of which is a challenge at High-frequencies.","PeriodicalId":272387,"journal":{"name":"2022 IEEE International Ultrasonics Symposium (IUS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128868304","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

Measuring Drug Release Induced by Thermal and Non-thermal Effects of Ultrasound in a Nanodrug Delivery System 纳米给药系统中超声热效应和非热效应诱导药物释放的测量

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9958697

Tyler K Hornsby, F. M. Kashkooli, A. Jakhmola, M. Kolios, J. Tavakkoli

引用次数: 4

Blind Phase-aberrated Baseband Point Spread Function Estimation Using Complex-valued Convolutional Neural Network 基于复值卷积神经网络的盲相位像差基带点扩展函数估计

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9958819

Yu-An Lin, Wei-Hsiang Shen, Meng-Lin Li

引用次数: 0

Exploiting temporal information in echocardiography for improved image segmentation 利用超声心动图中的时间信息改进图像分割

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9958670

Jieyu Hu, E. Smistad, I. M. Salte, H. Dalen, L. Løvstakken

{"title":"Exploiting temporal information in echocardiography for improved image segmentation","authors":"Jieyu Hu, E. Smistad, I. M. Salte, H. Dalen, L. Løvstakken","doi":"10.1109/IUS54386.2022.9958670","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9958670","url":null,"abstract":"Echocardiography is based on evaluating cineloops, where the temporal information is important for diagnosis. This information is seldom fully utilized in image analyses based on deep learning due to the massive manual annotation work required. In this work, we investigate the use of temporal information for the left heart segmentation throughout the cardiac cycle, both to enhance the training of simpler networks and for spatiotemporal neural networks to ensure consistent segmentation over time. Fully annotated cineloops were achieved in a semi-supervised manner, using pseudo-labeling from a network trained using limited annotations from the cardiac cycle. A temporal outlier removal method was developed to avoid artefact annotations. The study used $mathbf{N}boldsymbol{=174}$ recordings with A2C, A3C, and A4C views annotated at 7 frames, targeted at ES/ED and challenging cardiac cycle time points, with a testing set of $mathbf{N}boldsymbol{=25}$. We compared the performance of non-temporal U-Net segmentation trained with and without fully annotated cineloops, and by adding convLSTM layers in various configurations (encoder/decoder) to improve temporal consistency. Compared to the baseline U-Net trained at ES/ED, adding extra annotations targeted at time points with typical issues (e.g. valve opening), reduced outliers significantly and improved the average Dice. The fully automated pseudo-labeling exploited all frames, reduced outliers, and increased Dice to the same level as extra manual annotations. This approach also enabled the training of spatiotemporal networks. Adding convLSTM layers at each level in the encoder provided the best results.","PeriodicalId":272387,"journal":{"name":"2022 IEEE International Ultrasonics Symposium (IUS)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127244363","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

Hand-held 3D Photoacoustic Imaging System with GPS 手持三维光声成像系统与GPS

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9957259

Daohuai Jiang, Hongbo Chen, Feng Gao, R. Zheng, Fei Gao

引用次数: 2

MR for ULTRA-SR: Improved Localization with Morphological Image Processing 超sr磁共振:形态学图像处理改进定位

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9957276

S. Schoen, A. Samir, Viksit Kumar

引用次数: 0