2022 IEEE International Ultrasonics Symposium (IUS)最新文献_第4页

Local Measurement of Instantaneous Change in Myocardial Thickness in Swine Heart During Acute Myocardial Ischemia 猪急性心肌缺血时心肌厚度瞬时变化的局部测量

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9958249

Yukiko Obara, Shohei Mori, M. Iwai-Takano, M. Arakawa, Susumu Morosawa, Tomohiko Shindo, Hiroaki Yamamoto, Satoshi Yasuda, Hiroaki Shimokawa, H. Kanai

{"title":"Local Measurement of Instantaneous Change in Myocardial Thickness in Swine Heart During Acute Myocardial Ischemia","authors":"Yukiko Obara, Shohei Mori, M. Iwai-Takano, M. Arakawa, Susumu Morosawa, Tomohiko Shindo, Hiroaki Yamamoto, Satoshi Yasuda, Hiroaki Shimokawa, H. Kanai","doi":"10.1109/IUS54386.2022.9958249","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9958249","url":null,"abstract":"Ultrasound-based local strain rate (SR) measurement can detect the abnormality of the myocardial contraction owing to ischemia with high sensitivity. In the present paper, the local SR measurement using the velocity estimator based on the multifrequency phase differences was applied to the open-chest heart of swine during acute myocardial ischemia to capture the abnormality of the myocardial contraction. For the normal condition, some myocardial layers became thin during the systole even though the whole thickness of the heart wall increased. Interestingly, for the ischemic condition, the rate of the myocardial layers thinning during the systole decreased. In addition, the magnitude of thickening in the measured local SR distribution during the systole decreased in the ischemic condition. This may be caused by acute myocardial ischemia because the magnitude of thickening corresponds to the contractile force of the myocardium and it decreases in acute myocardial ischemia. The difference between the baseline and the ischemic condition was observed in the measured local SR distribution during the systole, even after only a few seconds from the occlusion of the coronary artery.","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":"129476441","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

Impact of skin pigmentation on photoacoustic imaging using linear array transducer: a pilot in vivo study 皮肤色素沉着对使用线性阵列换能器进行光声成像的影响：体内试验研究

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9958826

Guilherme S. P. Fernandes, João H. Uliana, L. Bachmann, A. Carneiro, M. Bell, T. Pavan

{"title":"Impact of skin pigmentation on photoacoustic imaging using linear array transducer: a pilot in vivo study","authors":"Guilherme S. P. Fernandes, João H. Uliana, L. Bachmann, A. Carneiro, M. Bell, T. Pavan","doi":"10.1109/IUS54386.2022.9958826","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9958826","url":null,"abstract":"Clinical photoacoustic (PA) imaging systems commonly integrate illumination and detection into the same probe. In this case, PA waves originating from light absorption by melanin in the skin propagate into the tissue and are backscattered to the transducer, which introduces acoustic clutter artifacts. In addition, skin absorption also decreases light fluence within the imaging plane. Therefore, it is important to understand how the amount of melanin in the epidermis impacts PA imaging quality. Toward this goal, PA images of 10 volunteers with different skin constitutive pigmentation were acquired with laser wavelengths of 750 nm, 810 nm, and 870 nm. The radial artery was adopted as the reference to calculate signal-to-noise ratios (SNRs) in order to quantify the presence of clutter artifacts in conventional amplitude-based PA images, as well as the capability of reducing clutter by applying short-lag spatial coherence (SLSC) beamforming. With conventional amplitude-based beamforming, the mean SNR across the 10 volunteers decreased from 38.9 dB to 33.7 dB with the decreasing epidermal melanin content. However, the mean SNR improved by 4.2 dB with SLSC PA images compared to conventional PA images. Overall, SLSC beamforming successfully reduced the appearance of clutter artifacts in PA images, resulting in better visualization of the radial artery and improved image quality. These results are promising to implement SLSC to both reduce acoustic clutter and improve target visualization in photoacoustic images acquired with light transmission through darker skin tones.","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":"129700625","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

High-Q A0 Mode Plate Wave Resonator on X-cut LiNbO3 Films with Dummy Electrode Arrays 带假电极阵列的x切割LiNbO3薄膜上的高q A0模式板波谐振器

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9957311

Qinwen Xu, Tong Xin, Zhiwei Wen, Yan Liu, Yao Cai, B. Soon, Wenjuan Liu, Chengliang Sun

引用次数: 1

Increased Displacement in Magnetomotive Ultrasound Imaging by Adding a Homogeneous Magnetic Field 通过添加均匀磁场增加磁动机超声成像中的位移

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9957813

Jules Reniaud, M. Evertsson, Roger Andersson, T. Jansson

{"title":"Increased Displacement in Magnetomotive Ultrasound Imaging by Adding a Homogeneous Magnetic Field","authors":"Jules Reniaud, M. Evertsson, Roger Andersson, T. Jansson","doi":"10.1109/IUS54386.2022.9957813","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9957813","url":null,"abstract":"Magnetomotive Ultrasound, MMUS, is an imaging modality used to reveal a magnetic contrast agent using an external time-varying inhomogeneous magnetic field. By this, the particles are set in motion, and the motion is detected with ultrasound. The technique has applications in cancer detection but is limited in penetration as the magnetic field decreases rapidly with distance. Instead of increasing the size of the conventionally used magnetic probe which would lead to heating and clinical practicality problems, adding a homogeneous magnetic field has been suggested to increase the force and thereby displacement. Since the magnetic force is proportional to both the magnetic field strength and the field gradient, the second homogeneous field will increase the force. The homogenous magnetic field was generated using a Helmholtz coil (2×150 turns) driven by an AC current (5 Hz, 4 A peak to peak) synchronized in phase with the rotating neodymium magnet generating the inhomogeneous field (also 5 Hz). The fields set in motion magnetic particles embedded in a tissue-mimicking material and the tissue motion was imaged using an ultrasound scanner (Visualsonics F2). The images were processed using a previously published algorithm to measure the axial component of the tissue motion. Adding the coil with a homogeneous field does increase the detected magneto-motion, in accordance with the theoretical model. A 40% increase was measured at a depth of 53mm for an additional 6mT magnetic field. This points to a possible way to increase the sensitivity in MMUS by adding a homogeneous magnetic field.","PeriodicalId":272387,"journal":{"name":"2022 IEEE International Ultrasonics Symposium (IUS)","volume":"9 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":"126893111","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

Non-Standard Functions Enabling Feasible Microwave- Acoustic Ladder Filters 非标准功能，使可行的微波声阶梯滤波器

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9958077

C. Caballero, L. Acosta, E. Guerrero, J. Verdú, P. de Paco

引用次数: 0

Machine Learning for Liver and Tumor Segmentation in Ultrasound Based on Labeled CT and MRI Images 基于标记CT和MRI图像的超声肝脏和肿瘤分割的机器学习

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9957634

Laurent Man, Haoyang Wu, Junzheng Man, Xuegong Shi, Haohao Wang, Q. Liang

引用次数: 3

Binary and Random Inputs to Rapidly Identify Overfitting of Deep Neural Networks Trained to Output Ultrasound Images 二值和随机输入快速识别超声图像输出深度神经网络的过拟合

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9957314

Jiaxin Zhang, Alycen Wiacek, M. Bell

引用次数: 1

MRI Guided Transcranial Acoustoelectric Imaging for Safe and Accurate Electrical Brain Mapping MRI引导下经颅声电成像安全准确的脑电成像

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9958749

M. Allard, Chet Preston, Teodoro Trujillo, Chiao Huang, Nan-kuei Chen, R. Witte

{"title":"MRI Guided Transcranial Acoustoelectric Imaging for Safe and Accurate Electrical Brain Mapping","authors":"M. Allard, Chet Preston, Teodoro Trujillo, Chiao Huang, Nan-kuei Chen, R. Witte","doi":"10.1109/IUS54386.2022.9958749","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9958749","url":null,"abstract":"Transcranial acoustoelectric brain imaging (tABI) is a new modality that combines ultrasound (US) delivery through the skull with radiofrequency sensing to produce electrical maps of the brain at high resolution. Whereas noninvasive EEG suffers from poor spatial resolution and inaccuracies for estimating current source densities, tABI takes advantage of an acoustoelectric (AE) interaction signal, which confines the current measurement to the focal region of the US beam on the millimeter scale. To safely and accurately deliver US pulses to the brain and co-register tABI maps with structure, a feedback and guidance system is required. The goal of this study is to demonstrate and determine the accuracy of neuronavigated tABI with real-time feedback for optimally placing the US array and directing the beam to the selected target location in the head. This will facilitate co-registration of the human head model, structural MRI, and tABI current density maps. The integrated system allows for a prediction of the US beam trajectory through the human skull with registration to clinical images for guidance and improving accuracy of real-time tABI. The guided system protocol adds only minutes to the process and results in easy localization of the target in the brain. The guided tABI has a resolution of 3 mm and a targetting accuracy of 5.1 mm.","PeriodicalId":272387,"journal":{"name":"2022 IEEE International Ultrasonics Symposium (IUS)","volume":"73 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":"127017157","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

Cervix Ultrasound Texture Analysis to Differentiate Between Term and Preterm Birth Pregnancy: A Machine Learning Approach 宫颈超声纹理分析区分足月和早产妊娠:一种机器学习方法

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9958755

David Bustamante, Yan Yan, Maryam Basij, Azin Gelareh, E. Hernandez-Andrade, Seyedmohammad Shams, M. Mehrmohammadi

{"title":"Cervix Ultrasound Texture Analysis to Differentiate Between Term and Preterm Birth Pregnancy: A Machine Learning Approach","authors":"David Bustamante, Yan Yan, Maryam Basij, Azin Gelareh, E. Hernandez-Andrade, Seyedmohammad Shams, M. Mehrmohammadi","doi":"10.1109/IUS54386.2022.9958755","DOIUrl":"https://doi.org/10.1109/IUS54386.2022.9958755","url":null,"abstract":"Preterm birth (PTB) is the leading cause of morbidity and mortality in neonates. Currently, the prediction of PTB is based on the identification of a short (less than 25 mm) cervix length (CL) measured by transvaginal ultrasound (TVUS). However, this methodology suffers a low sensitivity (< 50%). Therefore, there is an unmet need for developing better predictors of PTB. Textural analysis of B-mode US images has shown potential in providing quantitative biomarkers for tissue characterization. In this study, we investigated the utility of a texture-based machine-learning method applied to TVUS images to differentiate between term and preterm delivery and identify the potential risk of PTB. Sagittal TVUS images taken at 28 - 32 weeks of gestation were analyzed, and five regions of interest (ROI) were labeled. Morphological transforms (Prewitt, Sobel) and normalization were applied to the images to generate a vast pool of imaging features. To select the best features for building predictive models, Borda ranking was applied. With the selected features, three classifier models were made: logistic regression (LR), random forest (RF), and multilayer perceptron (MLP). At a fixed false positive rate of 10 percent, the MLP model achieved a sensitivity of 67 percent, suggesting that the Borda ranking procedure has a high potential for selecting meaningful features to be used in simple non-linear models, such as the MLP.","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":"129177640","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

Comparison of Weighted And Traditional Electrode Configurations In S0 Resonators S0谐振器中加权电极与传统电极结构的比较

2022 IEEE International Ultrasonics Symposium (IUS) Pub Date : 2022-10-10 DOI: 10.1109/IUS54386.2022.9957329

Ynshuai Liu, Tao Wu

引用次数: 0