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3d Acoustic Manipulation of Living Cells and Organisms Based On 2d array

IEEE TRANSACTIONS ON BIOMEdICAL ENGINEERING 2022年第7期69卷 2342-2352页

作者： Yang, Ye Ma, Teng Zhang, Qi Huang, Jiqing Hu, Qi Li, Yongchuan Wang, Congzhi Zheng, Hairong Chinese Acad Sci Shenzhen Inst Adv Technol Shenzhen Peoples R China Univ Chinese Acad Sci Shenzhen Coll Adv Technol Shenzhen Peoples R China Chinese Acad Sci Shenzhen Inst Adv Technol Shenzhen 518055 Peoples R China Univ Chinese Acad Sci Shenzhen Coll Adv Technol Beijing 100049 Peoples R China Chinese Acad Sci Shenzhen Inst Adv Technol Beijing Peoples R China

Flexible manipulation techniques for living cells and organisms are extremely useful tools for fundamental biomedical and life science research. Acoustic tweezers, which permit non-contact, label-free manipulation, are particularly suited to micromanipulation tasks as they provide a large acoustic radiation force and can be applied in various media. Here, we describe the design and fabrication of a 3 MHz, 64-element (8 x 8), 2d planar ultrasound array that realizes the multidimensional translation, rotation, orientation, and levitation of living cells and organisms. The focusing vortex and twin fields are generated using the holographic acoustic elements framework method. We demonstrate that the eggs and larvae of brine shrimp can be translated along a preset trajectory by controlling the central position of the vortex. By multiplexing counterclockwise vortices, clockwise vortices, and twin trap fields in a time sequence, the rotation direction of the shrimp eggs can be switched in real time, while non-spherical larvae can be reoriented. Moreover, the reflection of the acoustic beam can lift eggs and larvae from the bottom of the culture dish and further manipulate them in the vertical and horizontal directions. Additionally, we present quantitative analyses of the shrimp-egg rotation frequency with respect to the focal depths, topological charges of the vortex, and excitation voltages. These results indicate that acoustic tweezers based on 2d matrix arrays can realize complex and selective manipulation of living cells and organisms, thereby demonstrating their value for advancing research in the fields of cell assembly, tissue engineering, and micro-robot driving.

关键词： Acoustics Force Organisms Multiplexing Acoustic arrays Surface acoustic waves Optical vortices 3d acoustic manipulation living cells and organisms 2d array time-multiplex

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A Low-Profile Broadband 2d array Based on Inverted-E and Π Shaped Shared Structure Elements

A Low-Profile Broadband 2D Array Based on Inverted-E and Π ...

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2024 IEEE International Workshop on Wireless Sensing Technologies and Applications, IWSA 2024

作者： Xu, Yan Yuan, Bin Wang, Wenchang Liu, Zhen Shanghai Jiao Tong University School of Electronic Information and Electrical Engineering Shanghai China

ISBN: (纸本)9798331505837

In this paper, A 2d array is proposed based on inverted-E and Π shaped linear array elements, characterized by a low-profile and broadband shared structure. The design utilizes a shared monopole top-hat and PIFA patch structure to form inverted-E and Π shaped bi-directional linear array elements with elliptical top-hats and grounded stubs. A high-gain end-fire quasi-Yagi 2d array is then realized by employing these two linear array elements, functioning respectively as driven and parasitic elements. A prototype of the proposed 2d array consisting of three sub-arrays (one inverted-E and two Π shaped elements) operating in the upper C-band (f0 = 6.3GHz) is fabricated and tested. The measured peak gain reaches 9.3-10.3dBi within the 5.81-6.87GHz band, with an even wider impedance bandwidth (|S11| 0 © 2024 IEEE.

关键词： 2d array broadband inverted-E shaped element low-profile shared structure Π shaped element

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Fabrication Process of Conventional and Unconventional 3d Microcoils Based on 2d array of SU-8 Microposts Structure 22

Fabrication Process of Conventional and Unconventional 3D Mi...

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22nd International Conference on Solid-State Sensors, Actuators and Microsystems, Transducers 2023

作者： Mamleyev, Emil R. Kohl, Manfred Korvink, Jan G. Poletkin, Kirill V. Institute Of Microstructure Technology Karlsruhe Institute Of Technology Helmholtz-Platz 1 Eggenstein-Leopoldshafen76344 Germany Hefei University Of Technology School Of Instrument Science And Optoelectronics Engineering Anhui Hefei230002 China

ISBN: (纸本)9784886864352

This paper reports on the novel microfabrication approach resulting in the 2d array of SU-8 micro-posts for the solenoid micro-coil winding. The arrays contain a number of cylindrical SU-8 posts, each accomplishing pads for electric connection allowing specific activation of the fabricated 3d micro-coil device. The arrays are optimized to host a maximal possible post density in accordance with the minimal allowed distance of the wire bonder capillary (~600μm) at the selected post height (~500μm). despite the standard cylindrical post shape, the wire bonder trajectory can be driven to form unconventional micro-coil shapes between several posts that, in turn, effectively manage the magnetic field in micro-system devices. Here, we demonstrate the wire bonding of the oval helix around two posts and interwind in the shape of infinity between two and four posts. As an illustrative example, these new micro-coil shapes were tested in the levitation actuation of the conductive proof masses (PM). © 2023 IEEJ.

关键词： 2d array Inductive levitation Micro-coils Wirebonding

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A Conversion Algorithm for ECG signals on a 2d array based on digital Signal Processing 11

A Conversion Algorithm for ECG signals on a 2D array based o...

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11th International Conference on Communications, Circuits and Systems (ICCCAS)

作者： Cesar Cabanillas, Julio Kemper, Guillermo del Carpio, Christian Univ Peruana Ciencias Aplicadas Fac Engn Sch Elect Engn Lima Peru

ISBN: (数字)9781665469890

ISBN: (纸本)9781665469890

This work proposes a computational algorithm to convert digital files containing electrocardiogram (ECG) information into 1d signals. Many medical databases have in storage files containing ECG information that is not easy to process for computational algorithms. digitization by the proposed method makes it possible to modernize the databases of many health centers in order to perform post-processing of the signals obtained. This method is based on applying digital signal processing techniques to images obtained from a PdF file produced by an electrocardiograph. The proposed algorithm takes into consideration the thickness of the printed signal in the PdF image so that it does not introduce distortion in the final 1d signal. due to the distribution of the ECG signals on the PdF files the algorithm identifies and segments the signals on 2 dimensions. The results show that the proposed method can correctly reproduce the information of the ECG waves captured in the PdF file regardless of the elements outside the ECG signal such as the background grid or the different information indicators, whether they are labels or references of the ECG signals. The algorithm has an accuracy of 95% based on the statistical analysis performed for all samples.

关键词： digital Signal Processing ECG signals Conversion Printed Signal digitization 2d array

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development of backing piezoelectric micromachined ultrasonic transducer (B-PMUT) 2d array

Development of backing piezoelectric micromachined ultrasoni...

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IEEE International Ultrasonics Symposium (IEEE IUS)

作者： Wang, Xu-bo Ma, You-cao He, Le-ming Wang, Yan Xu, Wei-jiang Riaud, Antoine Ren, Jun-yan Zhou, Jia Fudan Univ Sch Microelect State Key Lab ASIC & Syst Shanghai Peoples R China Univ Polytech Hauts France CNRS Univ Lille Cent LilleUMR 8520IEMNDOAE F-59313 Valenciennes France INSA Hauts France F-59313 Valenciennes France

ISBN: (纸本)9780738112091

To improve the problem of narrow bandwidth and large crosstalk in high-frequency PMUT array, a PMUT device with a damping backing structure (B-PMUT) is proposed and realized. The device is a two-dimensional array of 8x16 elements with an element pitch of 75 mu m. The results show that the bandwidth of the device with backing is more than doubled (63%) to that of without backing. The crosstalk level between two neighboring elements decreased from -13.4 dB to -17 dB.

关键词： pMUTs 2d array PdMS Backing Crosstalk

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development of PZT-based 18 MHz 2d pMUT array with PdMS waveguide

Development of PZT-based 18 MHz 2D pMUT array with PDMS wave...

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IEEE International Ultrasonics Symposium (IEEE IUS)

作者： Wang, Xu-bo He, Le-ming Liu, Wen-juan Song, Shu-ren Xu, Wei-jiang Cheng, Qian Riaud, Antoine Ren, Jun-yan Zhou, Jia Fudan Univ Sch Microelect State Key Lab ASIC & Syst Shanghai Peoples R China Univ Polytech Hauts de France Univ Lille INSA Hauts de France CNRSYNCREACent LilleUMR IEMN DOAE 8520 F-59313 Valenciennes France Tongji Univ Sch Phys Sci & Engn Inst Acoust Shanghai Peoples R China

ISBN: (纸本)9781728154480

For high-resolution ultrasonic imaging, an 18 MHz lead zirconate titanate (PZT) based two-dimensional (2d) piezoelectric micromachined ultrasonic transducers (pMUTs) array with polydimethylsiloxane (PdMS) waveguide are developed. The array is composed of 8 x 16 elements with a pitch of 75 mu m and each element can be independently electrically excited. The structure is fabricated by micromachining. The resonance frequency obtained in air is 18.3 MHz and 18 MHz with and without PdMS waveguide filling, respectively. The displacement responses show a sensitivity of 2.6 nm/V and a bandwidth of 14% with PdMS waveguide.

关键词： PZT pMUTs 2d array PdMS waveguide

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Physical dosimetry of volumetric modulated arc therapy (VMAT) using EPId and 2d array for quality assurance

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EGYPTIAN JOURNAL OF RAdIOLOGY ANd NUCLEAR MEdICINE 2018年第2期49卷 477-484页

作者： Mohamed, Ismail E. Ibrahim, Ayman G. Zidan, Hamdy M. El-Bahkiry, Hesham S. El-sahragti, Adel Y. Ain Shams Univ Fac Med Radiat Oncol Dept Cairo Egypt Mansoura Univ Hosp Oncol & Nucl Med Dept Mansoura Egypt Damietta Univ Phys Dept Fac Sci Dumyat Egypt Mansoura Univ Oncol & Nucl Med Dept Fac Med Mansoura Egypt Jazan Univ Fac Appl Med Sci Diagnost Radiol Dept Jizan Saudi Arabia

Outline: To address the correspondence of measured and predicted doses for different malignant tumours utilizing various gamma criteria and QA for confirmation of VMAT with an EPId and 2d array detector. Methods: 24 patients with different malignant tumors were treated by VMAT techniques on Varian IX linear accelerator with 6 MV photon beams. Eclipse treatment planning system (TPS) is used to plan Patient's charts. Gamma Index (GI) variation was compared to the procedure of pre-treatment verification in VMAT plans. Results: The gamma criteria (dd/dTA) of dose difference and distance to agreement for (3%/3 mm), mean +/- Sd are gamma( <= 1%) = 99.42% +/- 0.67%, gamma(ma)(x) = 2.11 +/- 0.56 and gamma(avg) = 0.19 +/- 0.05 by EPId, and gamma(%<= 1) = 99.36% +/- 0.53%, gamma(max) = 1.65 +/- 0.45 and gamma(avg) = 0.22 +/- 0.05 by using 2d array detector. Conclusions: Specific QA of VMAT patient (using EPId or 2d array) display great possibility to spare time and to verify individual IMRT fields. 3%/3 mm is the most appropriate of gamma criteria (dd/dTA) for VMAT plans quality assurance. Control charts are a beneficial method for verification assessment for patient specific quality control.

关键词： VMAT EPId 2d array Gamma index Control charts QA

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Modeling Interaction Between Silver Nanoparticles in a 2d array on a Glass Substrate

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JOURNAL OF APPLIEd SPECTROSCOPY 2017年第6期83卷 996-1000页

作者： Mikitchuk, A. P. Kozadaev, K. V. Belorussian State Univ 5 Kurchatov Str Minsk 220045 BELARUS

We have theoretically studied the interaction between Ag particles in a 2d array of nanoparticles on a glass substrate. We used the finite-integral technique when modeling the spatial distribution of the electric field strength in the nanostructure on exposure to optical radiation. Comparing the results for modeling the optical properties of 2d arrays of Ag nanospheres with experimental data for glass substrates surface-modified by Ag nanoparticles showed good agreement between theory and experiment.

关键词： 2d array Ag nanoparticles optical absorption spectrum surface plasmon resonance

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Focusing surface wave imaging with flexible 2d array

Focusing surface wave imaging with flexible 2D array

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Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016

作者： Zhou, Shiyuan Fu, Junqiang Li, Zhe Xu, Chunguang Xiao, dingguo Wang, Shaohan Beijing Inst Technol Sch Mech Engn Beijing Peoples R China Beijing Inst Technol Key Lab Fundamental Sci Adv Machining Beijing Peoples R China

ISBN: (纸本)9781510600454

Curved surface is widely exist in key parts of energy and power equipment, such as, turbine blade cylinder block and so on. Cycling loading and harsh working condition of enable fatigue cracks appear on the surface. The crack should be found in time to avoid catastrophic damage to the equipment. A flexible 2d array transducer was developed. 2d Phased array focusing method (2dPA), Mode-Spatial double Phased focusing method (MSdPF) and the imaging method using the flexible 2d array probe are studied. Experiments using these focusing and imaging method are carried out. Surface crack image is obtained with both 2dPA and MSdPF focusing method. It have been proved that MSdPF can be more adaptable for curved surface and more calculate efficient than 2dPA.

关键词： Phased focusing imaging 2d array surface waves curved surface

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Ultrafast 3d synthetic aperture imaging with Hadamard-encoded aperiodic interval codes and aperiodic sparse arrays with separate transmitters and receivers

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ULTRASONICS 2025年 147卷 107497页

作者： Kaddoura, Tarek Masoumi, Mohammad Hadi Zemp, Roger Univ Alberta Dept Elect & Comp Engn Edmonton AB T6G 1H9 Canada

3d synthetic aperture (SA) imaging of volumes can be obtained using sparse 2d ultrasound arrays. However, even with just 256 elements, the volumetric imaging rate can be relatively slow due to having to transmit on each element in succession. Hadamard Aperiodic Interval (HAPI) codes can be used to image the full SA dataset in one extended transmit to speedup the synthetic aperture imaging, but their long nature produces large deadzones if the same elements are used as both transmitters and receivers. In this simulation study, we use a 2d Costas sparse array with separate transmitters and receivers to remedy the deadzone problem, and use it with the HAPI-coded imaging scheme to obtain fully transmit-receive focused, wide field-of-view 3d volumes with high-resolution and high SNR at ultrafast volumetric imaging rates of more than 500 volumes per second, almost nine times faster than non-coded SA imaging with the same imaging parameters. We show similar PSF performance compared to non-coded SA, and a 26 dB improvement in SNR with order-256 HAPI codes. We also present cyst simulations showing similar contrast for the HAPI-coded SA method compared to non-coded SA in the context of no noise, and improved contrast in the context of noise.

关键词： Costas Sparse array 2d array Volumetric imaging Ultrasound High-resolution Synthetic aperture imaging

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