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Wen A, Yang L, Lv T, Yang H, Li F, Mao Y, Xu G, Yang JY. Advocating for the implementation of SonoVue microbubbles as pressure sensors: a call to action for clinical noninvasive pressure estimation. Hepatobiliary Surg Nutr 2024; 13:690-695. [PMID: 39175718 PMCID: PMC11336535 DOI: 10.21037/hbsn-24-193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Accepted: 05/20/2024] [Indexed: 08/24/2024]
Affiliation(s)
- Ao Wen
- Liver Transplant Center, Organ Transplant Center, West China Hospital of Sichuan University, Chengdu, China
- Laboratory of Liver Transplantation, Key Laboratory of Transplant Engineering and Immunology, National Health Commission (NHC), West China Hospital of Sichuan University, Chengdu, China
- West China Hospital, West China School of Medicine, Sichuan University, Chengdu, China
| | - Lingxiao Yang
- Liver Transplant Center, Organ Transplant Center, West China Hospital of Sichuan University, Chengdu, China
- Laboratory of Liver Transplantation, Key Laboratory of Transplant Engineering and Immunology, National Health Commission (NHC), West China Hospital of Sichuan University, Chengdu, China
- West China Hospital, West China School of Medicine, Sichuan University, Chengdu, China
| | - Tao Lv
- Liver Transplant Center, Organ Transplant Center, West China Hospital of Sichuan University, Chengdu, China
- Laboratory of Liver Transplantation, Key Laboratory of Transplant Engineering and Immunology, National Health Commission (NHC), West China Hospital of Sichuan University, Chengdu, China
| | - Huayu Yang
- Department of Liver Surgery, Peking Union Medical College (PUMC) Hospital, PUMC and Chinese Academy of Medical Sciences, Beijing, China
| | - Fei Li
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Yilei Mao
- Department of Liver Surgery, Peking Union Medical College (PUMC) Hospital, PUMC and Chinese Academy of Medical Sciences, Beijing, China
| | - Gang Xu
- Liver Transplant Center, Organ Transplant Center, West China Hospital of Sichuan University, Chengdu, China
- Laboratory of Liver Transplantation, Key Laboratory of Transplant Engineering and Immunology, National Health Commission (NHC), West China Hospital of Sichuan University, Chengdu, China
| | - Jia-Yin Yang
- Liver Transplant Center, Organ Transplant Center, West China Hospital of Sichuan University, Chengdu, China
- Laboratory of Liver Transplantation, Key Laboratory of Transplant Engineering and Immunology, National Health Commission (NHC), West China Hospital of Sichuan University, Chengdu, China
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Kalayeh K, Fowlkes JB, Yeras S, Chen A, Daignault-Newton S, Schultz WW, Sack BS. A Comparative Study of Commercially Available Ultrasound Contrast Agents for Sub-harmonic-Aided Pressure Estimation (SHAPE) in a Bladder Phantom. ULTRASOUND IN MEDICINE & BIOLOGY 2024:S0301-5629(24)00226-6. [PMID: 39054243 DOI: 10.1016/j.ultrasmedbio.2024.05.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 05/14/2024] [Accepted: 05/19/2024] [Indexed: 07/27/2024]
Abstract
OBJECTIVE The goal of this study was to evaluate the performance of different commercial ultrasound contrast microbubbles (MBs) when measuring bladder phantom pressure with sub-harmonic-aided pressure estimation (SHAPE) methodology. We hypothesized that SHAPE performance is dependent on MB formulation. This study aimed to advance the SHAPE application for bladder pressure measurements in humans. METHODS Using a previously designed and built bladder phantom, we tested four different commercial agents: Definity, Lumason, Sonazoid and Optison. A standard clinical cystometrogram (CMG) system was used to infuse a MB-saline mixture into the bladder phantom to measure pressure. Ultrasound imaging was performed using the GE Healthcare LOGIQ E10 scanner. RESULTS All agents showed a predicted inverse linear relationship between change in pressure and SHAPE signal. However, they differ from each other in terms of stability, linear correlation, sensitivity to pressure and error. Generally, Definity and Lumason showed the highest performance during the SHAPE-based bladder phantom pressure assessments. CONCLUSION Our results show that the SHAPE signal decreases as bladder phantom pressures increases, regardless of the agent or CMG phase, suggesting the possibility of using SHAPE for measuring bladder pressure without a catheter. However, the efficacy of SHAPE in measuring pressure varies by MB formulation. These observations support using Lumason and Definity in a human subject feasibility study as we advance toward a catheter-free solution for measuring voiding bladder pressure via SHAPE.
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Affiliation(s)
- Kourosh Kalayeh
- Department of Urology, University of Michigan, Ann Arbor, MI, USA
| | - J Brian Fowlkes
- Department of Radiology, University of Michigan, Ann Arbor, MI, USA; Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Sophia Yeras
- College of Literature, Science, and the Arts, University of Michigan, Ann Arbor, MI, USA
| | - Amy Chen
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
| | | | - William W Schultz
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Bryan S Sack
- Department of Urology, University of Michigan, Ann Arbor, MI, USA.
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Azami RH, Forsberg F, Eisenbrey JR, Sarkar K. Acoustic response and ambient pressure sensitivity characterization of SonoVue for noninvasive pressure estimation. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2024; 155:2636-2645. [PMID: 38629883 PMCID: PMC11026112 DOI: 10.1121/10.0025690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 03/21/2024] [Accepted: 03/27/2024] [Indexed: 04/20/2024]
Abstract
Subharmonic aided pressure estimation (SHAPE) is a noninvasive pressure measurement technique based on the pressure dependent subharmonic signal from contrast microbubbles. Here, SonoVue microbubble with a sulfur hexafluoride (SF6) core, was investigated for use in SHAPE. The study uses excitations of 25-700 kPa peak negative pressure (PNP) and 3 MHz frequency over eight pressurization cycles between atmospheric pressure and overpressures, ranging from 0 to 25 kPa (0 to 186 mm Hg). The SonoVue subharmonic response was characterized into two types. Unlike other microbubbles, SonoVue showed significant subharmonic signals at low excitations (PNPs, 25-400 kPa), denoted here as type I subharmonic. It linearly decreased with increasing overpressure (-0.52 dB/kPa at 100 kPa PNP). However, over multiple pressurization-depressurization cycles, type I subharmonic changed; its value at atmospheric pressure decreased over multiple cycles, and at later cycles, it recorded an increase in amplitude with overpressure (highest, +13 dB at 50 kPa PNP and 10 kPa overpressure). The subharmonic at higher excitations (PNP > 400 kPa), denoted here as type II subharmonic, showed a consistent decrease with the ambient pressure increase with strongest sensitivity of -0.4 dB/kPa at 500 kPa PNP.
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Affiliation(s)
- Roozbeh H Azami
- Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC 20052, USA
| | - Flemming Forsberg
- Department of Radiology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA
| | - John R Eisenbrey
- Department of Radiology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA
| | - Kausik Sarkar
- Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC 20052, USA
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卢 慧, 王 云, 黄 来, 徐 岗, 周 娟, 虞 文, 李 飞. [Experimental study on high-frequency subharmonic scattering characteristics of ultrasound contrast agent microbubbles under low ambient pressure]. SHENG WU YI XUE GONG CHENG XUE ZA ZHI = JOURNAL OF BIOMEDICAL ENGINEERING = SHENGWU YIXUE GONGCHENGXUE ZAZHI 2023; 40:1209-1216. [PMID: 38151945 PMCID: PMC10753315 DOI: 10.7507/1001-5515.202304012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 08/29/2023] [Indexed: 12/29/2023]
Abstract
Correlation between nonlinear subharmonic scattering of ultrasound contrast agent microbubbles and ambient pressure is expected to be used for local brain tissue pressure monitoring. Although high-frequency ultrasound has achieved high-resolution imaging of intracranial microvessels, the research on high-frequency subharmonic scattering characteristics of microbubbles is insufficient at present, which restricts the research progress of estimating local brain tissue pressure based on high-frequency subharmonic scattering of microbubbles. Therefore, under the excitation of 10 MHz high-frequency ultrasound, the effects of different acoustic pressures and ambient pressures on the high-frequency subharmonic scattering characteristics of three different ultrasound contrast agents including SonoVue, Sonazoid and Huashengxian were investigated in this in vitro study. Results showed that the subharmonic scattering amplitudes of the three microbubbles increased with the increase of ambient pressure at the peak negative acoustic pressures of 696, 766 and 817 kPa, and there was a favorable linear correlation between subharmonic amplitude and ambient pressure. Under the above three acoustic pressures, the highest correlation coefficient of SonoVue was 0.948 ( P = 0.03), the highest sensitivity of pressure measurement was 0.248 dB/mm Hg and the minimum root mean square error (RMSE) was 2.64 mm Hg. Sonazoid's highest correlation coefficient was 0.982 ( P < 0.01), the highest sensitivity of pressure measurement was 0.052 dB/mm Hg and the minimum RMSE was 1.51 mm Hg. The highest correlation coefficient of Huashengxian was 0.969 ( P = 0.02), the highest sensitivity of pressure measurement was 0.098 dB/mm Hg and the minimum RMSE was 2.00 mm Hg. The above in vitro experimental results indicate that by selecting ultrasound contrast agent microbubbles and optimizing acoustic pressure, the correlation between high-frequency subharmonic scattering of microbubbles and ambient pressure can be improved, the sensitivity of pressure measurement can be upgraded, and the measurement error can be reduced to meet the clinical demand for local brain tissue pressure measurement, which provided an important experimental basis for subsequent research in vivo.
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Affiliation(s)
- 慧敏 卢
- 南京大学 医学院附属鼓楼医院 重症医学科(南京 210008)Department of Critical Care Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, P. R. China
- 中国科学院 深圳先进技术研究院 劳特伯生物医学成像研究中心(广东深圳 518055)Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, P. R. China
| | - 云 王
- 南京大学 医学院附属鼓楼医院 重症医学科(南京 210008)Department of Critical Care Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, P. R. China
- 中国科学院 深圳先进技术研究院 劳特伯生物医学成像研究中心(广东深圳 518055)Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, P. R. China
| | - 来鑫 黄
- 南京大学 医学院附属鼓楼医院 重症医学科(南京 210008)Department of Critical Care Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, P. R. China
| | - 岗 徐
- 南京大学 医学院附属鼓楼医院 重症医学科(南京 210008)Department of Critical Care Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, P. R. China
| | - 娟 周
- 南京大学 医学院附属鼓楼医院 重症医学科(南京 210008)Department of Critical Care Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, P. R. China
| | - 文魁 虞
- 南京大学 医学院附属鼓楼医院 重症医学科(南京 210008)Department of Critical Care Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, P. R. China
| | - 飞 李
- 南京大学 医学院附属鼓楼医院 重症医学科(南京 210008)Department of Critical Care Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, P. R. China
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Kim H, Rigo B, Wong G, Lee YJ, Yeo WH. Advances in Wireless, Batteryless, Implantable Electronics for Real-Time, Continuous Physiological Monitoring. NANO-MICRO LETTERS 2023; 16:52. [PMID: 38099970 PMCID: PMC10724104 DOI: 10.1007/s40820-023-01272-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 10/30/2023] [Indexed: 12/18/2023]
Abstract
This review summarizes recent progress in developing wireless, batteryless, fully implantable biomedical devices for real-time continuous physiological signal monitoring, focusing on advancing human health care. Design considerations, such as biological constraints, energy sourcing, and wireless communication, are discussed in achieving the desired performance of the devices and enhanced interface with human tissues. In addition, we review the recent achievements in materials used for developing implantable systems, emphasizing their importance in achieving multi-functionalities, biocompatibility, and hemocompatibility. The wireless, batteryless devices offer minimally invasive device insertion to the body, enabling portable health monitoring and advanced disease diagnosis. Lastly, we summarize the most recent practical applications of advanced implantable devices for human health care, highlighting their potential for immediate commercialization and clinical uses.
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Affiliation(s)
- Hyeonseok Kim
- IEN Center for Wearable Intelligent Systems and Healthcare, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Bruno Rigo
- IEN Center for Wearable Intelligent Systems and Healthcare, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Gabriella Wong
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Yoon Jae Lee
- IEN Center for Wearable Intelligent Systems and Healthcare, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Woon-Hong Yeo
- IEN Center for Wearable Intelligent Systems and Healthcare, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Tech and Emory University School of Medicine, Atlanta, GA, 30332, USA.
- Parker H. Petit Institute for Bioengineering and Biosciences, Institute for Materials, Institute for Robotics and Intelligent Machines, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
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Alaie S, Al’Aref SJ. Application of deep neural networks for inferring pressure in polymeric acoustic transponders/sensors. MACHINE LEARNING WITH APPLICATIONS 2023; 13:100477. [PMID: 38037627 PMCID: PMC10688392 DOI: 10.1016/j.mlwa.2023.100477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2023] Open
Abstract
Passive sensor-transponders have raised interest for the last few decades, due to their capability of low-cost remote monitoring without the need for energy storage. Their operating principle includes receiving a signal from a source and then reflecting the signal. While well-established transponders operate through electromagnetic antennas, those with a fully acoustic design have advantages such as lower cost and simplicity. Therefore, detection of pressures using the ultrasound signal that is backscattered from an acoustic resonator has been of interest recently. In order to infer the pressure from the backscattered signal, the established approach has been based upon the principle of detection of the shift to the frequency of resonance. Nevertheless, regression of the pressure from the signal with a small error is challenging and has been subject to research. Here in this paper, we explore an approach that employs deep learning for inferring pressure from the ultrasound reflections of polymeric resonators. We assess if neural network regressors can efficiently infer pressure reflected from a fully acoustic transponder. For this purpose, we compare the performance of several regressors such as a convolutional neural network, a network inspired by the ResNet, and a fully connected neural network. We observe that deep neural networks are advantageous in inferring pressure information with a minimal need for analyzing the signal. Our work suggests that a deep learning approach has the potential to be integrated with or replace other traditional approaches for inferring pressure from an ultrasound signal reflected from fully acoustic transponders or passive sensors.
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Affiliation(s)
- Seyedhamidreza Alaie
- Department of Mechanical & Aerospace Engineering, New Mexico State University, Las Cruces, NM, USA
| | - Subhi J. Al’Aref
- Department of Internal Medicine — Division of Cardiovascular Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, USA
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Azami RH, Forsberg F, Eisenbrey JR, Sarkar K. Ambient Pressure Sensitivity of the Subharmonic Response of Coated Microbubbles: Effects of Acoustic Excitation Parameters. ULTRASOUND IN MEDICINE & BIOLOGY 2023; 49:1550-1560. [PMID: 37100673 PMCID: PMC10306329 DOI: 10.1016/j.ultrasmedbio.2023.02.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 01/20/2023] [Accepted: 02/27/2023] [Indexed: 05/17/2023]
Abstract
OBJECTIVE The sensitivity of the acoustic response of microbubbles, specifically a strong correlation between their subharmonic response and the ambient pressure, has motivated development of a non-invasive subharmonic-aided pressure estimation (SHAPE) method. However, this correlation has previously been found to vary depending on the microbubble type, the acoustic excitation and the hydrostatic pressure range. In this study, the ambient pressure sensitivity of microbubble response was investigated. METHODS The fundamental, subharmonic, second harmonic and ultraharmonic responses from an in-house lipid-coated microbubble were measured for excitations with peak negative pressures (PNPs) of 50-700 kPa and frequencies of 2, 3 and 4 MHz in the ambient overpressure range 0-25 kPa (0-187 mmHg) in an in vitro setup. RESULTS The subharmonic response typically has three stages-occurrence, growth and saturation-with increasing excitation PNP. We find distinct decreasing and increasing variations of the subharmonic signal with overpressure that are closely related to the threshold of subharmonic generation in a lipid-shelled microbubble. Above the excitation threshold, that is, in the growth-saturation phase, subharmonic signals decreased linearly with slopes as high as -0.56 dB/kPa with ambient pressure increase; below the threshold excitation (at atmospheric pressure), increasing overpressure triggers subharmonic generation, indicating a lowering of subharmonic threshold, and therefore leads to an increase in subharmonic with overpressure, the maximum enhancement being ∼11 dB for 15 kPa overpressure at 2 MHz and 100 kPa PNP. CONCLUSION This study indicates the possible development of novel and improved SHAPE methodologies.
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Affiliation(s)
- Roozbeh H Azami
- Department of Mechanical and Aerospace Engineering, George Washington University, Washington, DC, USA
| | - Flemming Forsberg
- Department of Radiology, Thomas Jefferson University, Philadelphia, PA, USA
| | - John R Eisenbrey
- Department of Radiology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Kausik Sarkar
- Department of Mechanical and Aerospace Engineering, George Washington University, Washington, DC, USA.
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Wang Y, Lu H, Huang L, Li D, Qiu W, Li L, Xu G, Su M, Zhou J, Li F. Noninvasive Estimation of Tumor Interstitial Fluid Pressure from Subharmonic Scattering of Ultrasound Contrast Microbubbles. BIOSENSORS 2023; 13:bios13050528. [PMID: 37232888 DOI: 10.3390/bios13050528] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 04/29/2023] [Accepted: 05/05/2023] [Indexed: 05/27/2023]
Abstract
The noninvasive estimation of interstitial fluid pressure (IFP) using ultrasound contrast agent (UCA) microbubbles as pressure sensors will provide tumor treatments and efficacy assessments with a promising tool. This study aimed to verify the efficacy of the optimal acoustic pressure in vitro in the prediction of tumor IFPs based on UCA microbubbles' subharmonic scattering. A customized ultrasound scanner was used to generate subharmonic signals from microbubbles' nonlinear oscillations, and the optimal acoustic pressure was determined in vitro when the subharmonic amplitude reached the most sensitive to hydrostatic pressure changes. This optimal acoustic pressure was then applied to predict IFPs in tumor-bearing mouse models, which were further compared with the reference IFPs measured using a standard tissue fluid pressure monitor. An inverse linear relationship and good correlation (r = -0.853, p < 0.001) existed between the subharmonic amplitude and tumor IFPs at the optimal acoustic pressure of 555 kPa, and pressure sensitivity was 1.019 dB/mmHg. No statistical differences were found between the pressures measured by the standard device and those estimated via the subharmonic amplitude, as confirmed by cross-validation (mean absolute errors from 2.00 to 3.09 mmHg, p > 0.05). Our findings demonstrated that in vitro optimized acoustic parameters for UCA microbubbles' subharmonic scattering can be applied for the noninvasive estimation of tumor IFPs.
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Affiliation(s)
- Yun Wang
- Department of Ultrasound, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Huimin Lu
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
- Department of Critical Care Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - Laixin Huang
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Deyu Li
- Key Laboratory for Biomechanics and Mechanobiology of the Ministry of Education, Beijing Advanced Innovation Centre for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China
| | - Weibao Qiu
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Lingling Li
- Department of Ultrasound, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
| | - Gang Xu
- Liver Transplant Center, Organ Transplant Center, West China Hospital of Sichuan University, Chengdu 610041, China
- Laboratory of Liver Transplantation, Key Laboratory of Transplant Engineering and Immunology, West China Hospital of Sichuan University, Chengdu 610093, China
| | - Min Su
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Jianhua Zhou
- Department of Ultrasound, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
| | - Fei Li
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
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Lu H, Xu G, Wang Y, Yang H, Li D, Huang L, Su M, Li C, Qiu W, Mao Y, Yu W, Li F. Correlation Between Portal Vein Pressure and Subharmonic Scattering Signals From SonoVue Microbubbles in Canines. ULTRASOUND IN MEDICINE & BIOLOGY 2023; 49:203-211. [PMID: 36266141 DOI: 10.1016/j.ultrasmedbio.2022.08.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 08/25/2022] [Accepted: 08/26/2022] [Indexed: 06/16/2023]
Abstract
The current gold standard for the clinical diagnosis of portal hypertension (PH) is an invasive and indirect estimation of portal vein pressure (PVP). Therefore, the need for a non-invasive PVP measurement method is urgent. Subharmonic scattering of ultrasound contrast agent (UCA) microbubbles is under investigation in clinical research as a pressure indicator. However, the driving acoustic pressure must be optimized to improve the ambient pressure sensitivity of the subharmonic amplitude for different UCAs. In this study, for the first time, we obtained the relationship between the PVP and the amplitude of the subharmonic signal scattered from SonoVue microbubbles by using two canines to build the PH model. The results revealed a desirable linear correlation between the subharmonic amplitude and PVP (<20 mmHg) at the incident acoustic pressure of 453 kPa (r = -0.910, p < 0.005; sensitivity: -2.003 dB/mmHg); this was one order of magnitude higher in sensitivity than that of the in vitro case with a detectable pressure variation of approximately 1 mmHg. This indicates the feasibility of using UCA microbubbles to accurately measure low ambient pressures in vivo and further exhibits the potential of the method for non-invasive pressure estimation in clinical applications.
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Affiliation(s)
- Huimin Lu
- Department of Critical Care Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing, China; Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Gang Xu
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China; Department of Liver Surgery, Peking Union Medical College (PUMC) Hospital, PUMC and Chinese Academy of Medical Sciences, Beijing, China; Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, China
| | - Yun Wang
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China; Department of Ultrasound, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
| | - Huayu Yang
- Department of Liver Surgery, Peking Union Medical College (PUMC) Hospital, PUMC and Chinese Academy of Medical Sciences, Beijing, China
| | - Deyu Li
- Key Laboratory for Biomechanics and Mechanobiology of the Ministry of Education, Beijing Advanced Innovation Centre for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Laixin Huang
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Min Su
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Changcan Li
- Department of Liver Surgery, Peking Union Medical College (PUMC) Hospital, PUMC and Chinese Academy of Medical Sciences, Beijing, China
| | - Weibao Qiu
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Yilei Mao
- Department of Liver Surgery, Peking Union Medical College (PUMC) Hospital, PUMC and Chinese Academy of Medical Sciences, Beijing, China.
| | - Wenkui Yu
- Department of Critical Care Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing, China.
| | - Fei Li
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
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Liang S, Hu D, Li G, Gao D, Li F, Zheng H, Pan M, Sheng Z. NIR-II fluorescence visualization of ultrasound-induced blood-brain barrier opening for enhanced photothermal therapy against glioblastoma using indocyanine green microbubbles. Sci Bull (Beijing) 2022; 67:2316-2326. [PMID: 36546222 DOI: 10.1016/j.scib.2022.10.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 10/21/2022] [Accepted: 10/27/2022] [Indexed: 11/06/2022]
Abstract
Focused ultrasound (FUS)-induced blood-brain barrier (BBB) opening is crucial for enhancing glioblastoma (GBM) therapies. However, an in vivo imaging approach with a high spatial-temporal resolution to monitor the BBB opening process in situ and synchronously is still lacking. Herein, we report the use of indocyanine green (ICG)-dopped microbubbles (MBs-ICG) for visualizing the FUS-induced BBB opening and enhancing the photothermal therapy (PTT) against GBM. The MBs-ICG show bright fluorescence in the second near-infrared window (NIR-II), ultrasound contrast, and ultrasound-induced size transformation properties. By virtue of complementary contrast properties, MBs-ICG can be successfully applied for cerebral vascular imaging with NIR-II fluorescence resolution of ∼168.9 μm and ultrasound penetration depth of ∼7 mm. We further demonstrate that MBs-ICG can be combined with FUS for in situ and synchronous visualization of the BBB opening with a NIR-II fluorescence signal-to-background ratio of 6.2 ± 1.2. Finally, our data show that the MBs-ICG transform into lipid-ICG nanoparticles under FUS irradiation, which then rapidly penetrate the tumor tissues within 10 min and enhance PTT in orthotopic GBM-bearing mice. The multifunctional MBs-ICG approach provides a novel paradigm for monitoring BBB opening and enhancing GBM therapy.
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Affiliation(s)
- Simin Liang
- Department of Ultrasonography, Shenzhen Hospital (Futian) of Guangzhou University of Chinese Medicine, Shenzhen 518034, China; Paul C. Lauterbur Research Center for Biomedical Imaging, CAS Key Laboratory of Health Informatics, Shenzhen Key Laboratory of Ultrasound Imaging and Therapy, Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Dehong Hu
- Paul C. Lauterbur Research Center for Biomedical Imaging, CAS Key Laboratory of Health Informatics, Shenzhen Key Laboratory of Ultrasound Imaging and Therapy, Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Guofeng Li
- Paul C. Lauterbur Research Center for Biomedical Imaging, CAS Key Laboratory of Health Informatics, Shenzhen Key Laboratory of Ultrasound Imaging and Therapy, Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China; School of Biomedical Engineering, Guangdong Medical University, Dongguan 523808, China
| | - Duyang Gao
- Paul C. Lauterbur Research Center for Biomedical Imaging, CAS Key Laboratory of Health Informatics, Shenzhen Key Laboratory of Ultrasound Imaging and Therapy, Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Fei Li
- Paul C. Lauterbur Research Center for Biomedical Imaging, CAS Key Laboratory of Health Informatics, Shenzhen Key Laboratory of Ultrasound Imaging and Therapy, Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Hairong Zheng
- Paul C. Lauterbur Research Center for Biomedical Imaging, CAS Key Laboratory of Health Informatics, Shenzhen Key Laboratory of Ultrasound Imaging and Therapy, Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Min Pan
- Department of Ultrasonography, Shenzhen Hospital (Futian) of Guangzhou University of Chinese Medicine, Shenzhen 518034, China; Paul C. Lauterbur Research Center for Biomedical Imaging, CAS Key Laboratory of Health Informatics, Shenzhen Key Laboratory of Ultrasound Imaging and Therapy, Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Zonghai Sheng
- Paul C. Lauterbur Research Center for Biomedical Imaging, CAS Key Laboratory of Health Informatics, Shenzhen Key Laboratory of Ultrasound Imaging and Therapy, Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
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11
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Azami RH, Aliabouzar M, Osborn J, Kumar KN, Forsberg F, Eisenbrey JR, Mallik S, Sarkar K. Material Properties, Dissolution and Time Evolution of PEGylated Lipid-Shelled Microbubbles: Effects of the Polyethylene Glycol Hydrophilic Chain Configurations. ULTRASOUND IN MEDICINE & BIOLOGY 2022; 48:1720-1732. [PMID: 35697583 PMCID: PMC9357055 DOI: 10.1016/j.ultrasmedbio.2022.04.216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 03/21/2022] [Accepted: 04/21/2022] [Indexed: 05/12/2023]
Abstract
Polyethylene glycol (PEG) is often added to the lipid coating of a contrast microbubble to prevent coalescence and improve circulation. At high surface density, PEG chains are known to undergo a transition from a mushroom configuration to an extended brush configuration. We investigated the effects of PEG chain configuration on attenuation and dissolution of microbubbles by varying the molar ratio of the PEGylated lipid in the shell with three (0%, 2% and 5%) in the mushroom configuration and two (10% and 20%) in the brush configuration. We measured attenuation through the bubble suspensions and used it to obtain the characteristic rheological properties of their shells according to two interfacial rheological models. The interfacial elasticity was found to be significantly lower in the brush regime (∼0.6 N/m) than in the mushroom regime (∼1.3 N/m), but similar in value within each regime. The dissolution behavior of microbubbles under acoustic excitation inside an air-saturated medium was studied by measuring the time-dependent attenuation. Total attenuation recorded a transient increase because of growth resulting from air influx and an eventual decrease caused by dissolution. Microbubble shell composition with varying PEG concentrations had significant effects on dissolution dynamics.
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Affiliation(s)
- Roozbeh H Azami
- Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC, USA
| | - Mitra Aliabouzar
- Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC, USA
| | - Jenna Osborn
- Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC, USA
| | - Krishna N Kumar
- Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC, USA
| | - Flemming Forsberg
- Department of Radiology, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - John R Eisenbrey
- Department of Radiology, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Sanku Mallik
- Department of Pharmaceutical Sciences, North Dakota State University, Fargo, North Dakota, USA
| | - Kausik Sarkar
- Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC, USA.
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12
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Qiao X, Wen Y, Yu J, Bouakaz A, Zong Y, Wan M. Noninvasive Pressure Estimation Based on the Subharmonic Response of SonoVue: Application to Intracranial Blood Pressure Assessment. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2022; 69:957-966. [PMID: 34941508 DOI: 10.1109/tuffc.2021.3138100] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Intracranial blood pressure can directly reflect the status of blood vessels in real time. However, it can only be estimated invasively using a microcatheter during craniotomy. Subharmonic-aided pressure estimation (SHAPE) is a promising technique for estimating cardiac pressures but mainly uses Sonazoid, whereas SHAPE using SonoVue is still in the early stages of development. The aim of this study was to optimize transcranial SHAPE using SonoVue by investigating the relationship between subharmonic signals and middle cerebral artery pressure (MCAP) (20-160 mmHg) in vitro. We examined the effect of acoustic output levels (peak negative pressures (PNPs) of 238, 346, and 454 kPa), time in suspension (time from reconstituting the suspension to extracting it: 0-30 min), and exposure to gas-equilibrated saline (3 min, 1 h, or original gas completely replaced by air) on the subharmonic-pressure relationship. A mean subharmonic amplitude over a 0.4 MHz bandwidth was extracted using a 5 MHz 12-cycle pulse. A PNP of 346 kPa elicited the best subharmonic sensitivity for assessing hydrostatic pressures up to 0.24 dB/mmHg, possibly because compression-only behavior no longer occurs at this pressure. Moreover, the expansion force is not large enough to offset the effects of hydrostatic pressure. A linear monotonic relationship between the subharmonic amplitude and hydrostatic pressure was only observed for just prepared SonoVue. Excessive exposure to gas-equilibrated saline also affected the subharmonic-pressure relationship. Therefore, just prepared SonoVue should be used, and the duration of the pressure estimation process should be strictly controlled.
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13
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Xu G, Lu H, Yang H, Li D, Liu R, Su M, Jin B, Li C, Lv T, Du S, Yang J, Qiu W, Mao Y, Li F. Subharmonic Scattering of SonoVue Microbubbles Within 10-40-mmHg Overpressures In Vitro. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2021; 68:3583-3591. [PMID: 34329162 DOI: 10.1109/tuffc.2021.3101694] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Ultrasound contrast agent microbubbles are considered promising sensors to measure portal vein pressure noninvasively. In this study, we investigated the subharmonic scattering power and optimal incident acoustic pressure of SonoVue microbubbles (concentration: [Formula: see text]/mL 0.9% NaCl solution) in the ambient pressure range of 10-40 mmHg with 10-mmHg increments at a temperature of 25 °C. The results demonstrated that the subharmonic response of the SonoVue microbubbles existed in three stages: the first growth stage (40-300 kPa), saturation (300-400 kPa), and the second growth stage (400-540 kPa). In the first growth stage, the subharmonic amplitude increased with ambient pressure. However, while the ambient pressure increased, the subharmonic amplitude decreased in the second growth stage. The best correlation of the subharmonic amplitudes with the ambient pressures was obtained at a high incident acoustic pressure of 520 kPa (sensitivity: 0.15 dB/mmHg, r2 = 0.99 , and root-mean-square error = 0.49 mmHg), which indicated that the subharmonic signals in the second growth stage might be suitable for estimating low ambient pressures. The results presented in our study may pave the way for portal vein pressure estimation using SonoVue microbubbles as sensors in clinical applications.
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14
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Blais S, Porée J, Ramos-Palacios G, Desmarais S, Perrot V, Sadikot A, Provost J. Equivalent time active cavitation imaging. Phys Med Biol 2021; 66. [PMID: 34320473 DOI: 10.1088/1361-6560/ac1877] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 07/28/2021] [Indexed: 11/12/2022]
Abstract
RATIONALE Despite the development of a large number of neurologically active drugs, brain diseases are difficult to treat due to the inability of many drugs to penetrate the blood-brain barrier. High-intensity focused ultrasound blood-brain barrier opening in a site-specific manner could significantly expand the spectrum of available drug treatments. However, without monitoring, brain damage and off target effects can occur during these treatments. While some methods can monitor inertial cavitation, temperature increase, or passively monitor cavitation events, to the best of our knowledge none of them can actively and spatiotemporally map the high intensity focused ultrasound pressure field during treatment. METHODS Here we detail the development of a novel ultrasound imaging modality called Equivalent Time Active Cavitation Imaging capable of characterizing the high-intensity focused ultrasound pressure field through stable cavitation events across the field of view with an ultrafast active imaging setup. This work introduces 1) a novel plane wave sequence whose transmit delays increase linearly with transmit events enabling the sampling of high-frequency cavitation events, and 2) an algorithm allowing the filtration of the microbubble signal for pressure field mapping. The pressure measurements with our modality were first carried out in vitro for hydrophone comparison and then in vivo during blood-brain barrier opening treatment in mice. RESULTS This study demonstrates the ability of our modality to spatiotemporally characterize a modulation pressure field with an active imaging setup. The resulting pressure field mapping reveals a good correlation with hydrophone measurements. Further proof is provided experimentally in vivo with promising results. CONCLUSION This proof of concept establishes the first steps towards a novel ultrasound modality for monitoring focused ultrasound blood-brain barrier opening, allowing new possibilities for a safe and precise monitoring method.
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Affiliation(s)
- Simon Blais
- Engineering Physics Department, Polytechnique Montréal, Montreal, Quebec, CANADA
| | - Jonathan Porée
- Engineering Physics Department, Polytechnique Montreal, Montreal, Quebec, CANADA
| | | | - Samuel Desmarais
- Engineering Physics Department, Montreal Polytechnic, Montreal, Quebec, CANADA
| | - Vincent Perrot
- Engineering Physics Department, Polytechnique Montréal, Montreal, Quebec, CANADA
| | - Abbas Sadikot
- Montreal Neurological Institute and Hospital, Montreal, Quebec, CANADA
| | - Jean Provost
- 1 Engineering Physics Department, Polytechnique Montreal, Montreal, Quebec, CANADA
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15
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Akbar A, Pillalamarri N, Jonnakuti S, Ullah M. Artificial intelligence and guidance of medicine in the bubble. Cell Biosci 2021; 11:108. [PMID: 34108005 PMCID: PMC8191053 DOI: 10.1186/s13578-021-00623-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 06/04/2021] [Indexed: 02/06/2023] Open
Abstract
Microbubbles are nanosized gas-filled bubbles. They are used in clinical diagnostics, in medical imaging, as contrast agents in ultrasound imaging, and as transporters for targeted drug delivery. They can also be used to treat thrombosis, neoplastic diseases, open arteries and vascular plaques and for localized transport of chemotherapies in cancer patients. Microbubbles can be filled with any type of therapeutics, cure agents, growth factors, extracellular vesicles, exosomes, miRNAs, and drugs. Microbubbles protect their cargo from immune attack because of their specialized encapsulated shell composed of lipid and protein. Filled with curative medicine, they could effectively circulate through the whole body safely and efficiently to reach the target area. The advanced bubble-based drug-delivery system, integrated with artificial intelligence for guidance, holds great promise for the targeted delivery of drugs and medicines.
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Affiliation(s)
- Asma Akbar
- Institute for Immunity and Transplantation, Stem Cell Biology and Regenerative Medicine, School of Medicine, Stanford University, Palo Alto, CA, 94304, USA
- Molecular Medicine, Department of Biomedical Innovation and Bioengineering, School of Medicine, Stanford University, Palo Alto, CA, USA
| | - Nagavalli Pillalamarri
- Institute for Immunity and Transplantation, Stem Cell Biology and Regenerative Medicine, School of Medicine, Stanford University, Palo Alto, CA, 94304, USA
| | - Sriya Jonnakuti
- Institute for Immunity and Transplantation, Stem Cell Biology and Regenerative Medicine, School of Medicine, Stanford University, Palo Alto, CA, 94304, USA
| | - Mujib Ullah
- Institute for Immunity and Transplantation, Stem Cell Biology and Regenerative Medicine, School of Medicine, Stanford University, Palo Alto, CA, 94304, USA.
- Molecular Medicine, Department of Biomedical Innovation and Bioengineering, School of Medicine, Stanford University, Palo Alto, CA, USA.
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16
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Jiang H, Woodhouse I, Selvamani V, Ma JL, Tang R, Goergen CJ, Soleimani T, Rahimi R. A Wireless Implantable Passive Intra-Abdominal Pressure Sensing Scheme via Ultrasonic Imaging of a Microfluidic Device. IEEE Trans Biomed Eng 2021; 68:747-758. [PMID: 32780694 DOI: 10.1109/tbme.2020.3015485] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In this article, we demonstrate a wireless and passive physiological pressure sensing scheme that utilizes ultrasound imaging of an implantable microfluidic based pressure sensitive transducer. The transducer consists of a sub-mm scale pressure sensitive membrane that covers a reservoir filled with water and is connected to a hydrophobic micro-channel. Applied pressure onto the transducer deflects the membrane and pushes the water from the reservoir into the channel; the water's travelling distance in the channel is a function of the applied pressure, which is quantitatively measured by using a 40 MHz ultrasound imaging system. The sensor presents a linear sensitivity of 42 kPa/mm and a spatial resolution of 1.2 kPa/30 μm in the physiological range of abdominal compartment syndrome. Reliability assessments of the transducer confirm its ability to remain functional after more than 600 cycles of pressure up to 55 kPa over the course of 2 days. Ex vivo experimental results verify the practical capability of the technology to effectively measure pressures under a 15 mm thick porcine skin. It is anticipated that this technology can be applied to a broad range of implantable pressure measurement, by simply tuning the thickness of the thin polydimethylsiloxane membrane and the geometry of the reservoir.
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17
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Nio AQX, Faraci A, Christensen-Jeffries K, Raymond JL, Monaghan MJ, Fuster D, Forsberg F, Eckersley RJ, Lamata P. Optimal Control of SonoVue Microbubbles to Estimate Hydrostatic Pressure. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2020; 67:557-567. [PMID: 31634833 PMCID: PMC7053253 DOI: 10.1109/tuffc.2019.2948759] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 10/16/2019] [Indexed: 05/13/2023]
Abstract
The measurement of cardiac and aortic pressures enables diagnostic insight into cardiac contractility and stiffness. However, these pressures are currently assessed invasively using pressure catheters. It may be possible to estimate these pressures less invasively by applying microbubble ultrasound contrast agents as pressure sensors. The aim of this study was to investigate the subharmonic response of the microbubble ultrasound contrast agent SonoVue (Bracco Spa, Milan, Italy) at physiological pressures using a static pressure phantom. A commercially available cell culture cassette with Luer connections was used as a static pressure chamber. SonoVue was added to the phantom, and radio frequency data were recorded on the ULtrasound Advanced Open Platform (ULA-OP). The mean subharmonic amplitude over a 40% bandwidth was extracted at 0-200-mmHg hydrostatic pressures, across 1.7-7.0-MHz transmit frequencies and 3.5%-100% maximum scanner acoustic output. The Rayleigh-Plesset equation for single-bubble oscillations and additional hysteresis experiments were used to provide insight into the mechanisms underlying the subharmonic pressure response of SonoVue. The subharmonic amplitude of SonoVue increased with hydrostatic pressure up to 50 mmHg across all transmit frequencies and decreased thereafter. A decreasing microbubble surface tension may drive the initial increase in the subharmonic amplitude of SonoVue with hydrostatic pressure, while shell buckling and microbubble destruction may contribute to the subsequent decrease above 125-mmHg pressure. In conclusion, a practical operating regime that may be applied to estimate cardiac and aortic blood pressures from the subharmonic signal of SonoVue has been identified.
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Affiliation(s)
- Amanda Q. X. Nio
- Department of Biomedical EngineeringSchool of Biomedical Engineering and Imaging SciencesKing’s College LondonLondonSE1 7EHU.K.
| | - Alessandro Faraci
- Department of Biomedical EngineeringSchool of Biomedical Engineering and Imaging SciencesKing’s College LondonLondonSE1 7EHU.K.
| | - Kirsten Christensen-Jeffries
- Department of Biomedical EngineeringSchool of Biomedical Engineering and Imaging SciencesKing’s College LondonLondonSE1 7EHU.K.
| | - Jason L. Raymond
- Department of Engineering ScienceUniversity of OxfordOxfordOX1 3PJU.K.
| | - Mark J. Monaghan
- Department of CardiologyKing’s College HospitalLondonSE5 9RSU.K.
| | - Daniel Fuster
- Institut Jean Le Rond D’Alembert, Sorbonne UniversitéCenter National de la Recherche Scientifique, UMR 7190F-75005ParisFrance
| | - Flemming Forsberg
- Department of RadiologyThomas Jefferson UniversityPhiladelphiaPA19107USA
| | - Robert J. Eckersley
- Department of Biomedical EngineeringSchool of Biomedical Engineering and Imaging SciencesKing’s College LondonLondonSE1 7EHU.K.
| | - Pablo Lamata
- Department of Biomedical EngineeringSchool of Biomedical Engineering and Imaging SciencesKing’s College LondonLondonSE1 7EHU.K.
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18
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Xu G, Li F, Mao Y. Portal pressure monitoring-state-of-the-art and future perspective. ANNALS OF TRANSLATIONAL MEDICINE 2019; 7:583. [PMID: 31807564 DOI: 10.21037/atm.2019.09.22] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Portal hypertension is a serious symptom of chronic liver diseases, which can lead to many critical complications, such as the formation of varices related to upper digestive bleeding, ascites, infection, hepatic encephalopathy, renal failure, and even death. As a result, portal pressure monitoring has important prognostic and clinical implications. The hepatic venous pressure gradient measurement, a gold-standard method applied to monitor portal pressure, is invasive and only available in experienced centers. Over the past decade, noninvasive methods aimed at monitoring the portal pressure have been increasingly investigated, including serum markers, radiological features, ultrasound elastography, doppler and contrast-enhanced ultrasonography. In this study, we focused on both invasive and noninvasive methods for portal pressure monitoring and explored their roles in clinical setting. The advantages and limitations of various techniques for future research are also discussed.
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Affiliation(s)
- Gang Xu
- Department of Liver Surgery, Peking Union Medical College (PUMC) Hospital, PUMC and Chinese Academy of Medical Sciences, Beijing 100730, China.,Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Fei Li
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.,Shenzhen Key Laboratory of Ultrasound Imaging and Therapy, Shenzhen 518055, China
| | - Yilei Mao
- Department of Liver Surgery, Peking Union Medical College (PUMC) Hospital, PUMC and Chinese Academy of Medical Sciences, Beijing 100730, China
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