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Kawelah MR, Han S, Atila Dincer C, Jeon J, Brisola J, Hussain AF, Jeevarathinam AS, Bouchard R, Marras AE, Truskett TM, Sokolov KV, Johnston KP. Antibody-Conjugated Polymersomes with Encapsulated Indocyanine Green J-Aggregates and High Near-Infrared Absorption for Molecular Photoacoustic Cancer Imaging. ACS APPLIED MATERIALS & INTERFACES 2024; 16:5598-5612. [PMID: 38270979 PMCID: PMC11246536 DOI: 10.1021/acsami.3c16584] [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] [Indexed: 01/26/2024]
Abstract
Imaging plays a critical role in all stages of cancer care from early detection to diagnosis, prognosis, and therapy monitoring. Recently, photoacoustic imaging (PAI) has started to emerge into the clinical realm due to its high sensitivity and ability to penetrate tissues up to several centimeters deep. Herein, we encapsulated indocyanine green J (ICGJ) aggregate, one of the only FDA-approved organic exogenous contrast agents that absorbs in the near-infrared range, at high loadings up to ∼40% w/w within biodegradable polymersomes (ICGJ-Ps) composed of poly(lactide-co-glycolide-b-polyethylene glycol) (PLGA-b-PEG). The small Ps hydrodynamic diameter of 80 nm is advantageous for in vivo applications, while directional conjugation with epidermal growth factor receptor (EGFR) targeting cetuximab antibodies renders molecular specificity. Even when exposed to serum, the ∼11 nm-thick membrane of the Ps prevents dissociation of the encapsulated ICGJ for at least 48 h with a high ratio of ICGJ to monomeric ICG absorbances (i.e., I895/I780 ratio) of approximately 5.0 that enables generation of a strong NIR photoacoustic (PA) signal. The PA signal of polymersome-labeled breast cancer cells is proportional to the level of cellular EGFR expression, indicating the feasibility of molecular PAI with antibody-conjugated ICGJ-Ps. Furthermore, the labeled cells were successfully detected with PAI in highly turbid tissue-mimicking phantoms up to a depth of 5 mm with the PA signal proportional to the amount of cells. These data show the potential of molecular PAI with ICGJ-Ps for clinical applications such as tumor margin detection, evaluation of lymph nodes for the presence of micrometastasis, and laparoscopic imaging procedures.
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Affiliation(s)
- Mohammed R Kawelah
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Sangheon Han
- Department of Imaging Physics, MD Anderson Cancer Center, Houston, Texas 77030, United States
- Department of Bioengineering, Rice University, Houston, Texas 77005, United States
| | - Ceren Atila Dincer
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- Department of Chemical Engineering, Faculty of Engineering, Ankara Universit, Ankara 06100, Turkey
| | - Jongyeong Jeon
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Joel Brisola
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Aasim F Hussain
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | | | - Richard Bouchard
- Department of Imaging Physics, MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Alexander E Marras
- Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Thomas M Truskett
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Konstantin V Sokolov
- Department of Imaging Physics, MD Anderson Cancer Center, Houston, Texas 77030, United States
- Graduate School of Biomedical Sciences, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
- Department of Bioengineering, Rice University, Houston, Texas 77005, United States
| | - Keith P Johnston
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, United States
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Fu Q, Yang X, Wang M, Zhu K, Wang Y, Song J. Activatable Probes for Ratiometric Imaging of Endogenous Biomarkers In Vivo. ACS NANO 2024; 18:3916-3968. [PMID: 38258800 DOI: 10.1021/acsnano.3c10659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Dynamic variations in the concentration and abnormal distribution of endogenous biomarkers are strongly associated with multiple physiological and pathological states. Therefore, it is crucial to design imaging systems capable of real-time detection of dynamic changes in biomarkers for the accurate diagnosis and effective treatment of diseases. Recently, ratiometric imaging has emerged as a widely used technique for sensing and imaging of biomarkers due to its advantage of circumventing the limitations inherent to conventional intensity-dependent signal readout methods while also providing built-in self-calibration for signal correction. Here, the recent progress of ratiometric probes and their applications in sensing and imaging of biomarkers are outlined. Ratiometric probes are classified according to their imaging mechanisms, and ratiometric photoacoustic imaging, ratiometric optical imaging including photoluminescence imaging and self-luminescence imaging, ratiometric magnetic resonance imaging, and dual-modal ratiometric imaging are discussed. The applications of ratiometric probes in the sensing and imaging of biomarkers such as pH, reactive oxygen species (ROS), reactive nitrogen species (RNS), glutathione (GSH), gas molecules, enzymes, metal ions, and hypoxia are discussed in detail. Additionally, this Review presents an overview of challenges faced in this field along with future research directions.
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Affiliation(s)
- Qinrui Fu
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, Shandong 266021, China
| | - Xiao Yang
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, Shandong 266021, China
| | - Mengzhen Wang
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, Shandong 266021, China
| | - Kang Zhu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Yin Wang
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, Shandong 266021, China
| | - Jibin Song
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
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Zhang L, Du W, Kim JH, Yu CC, Dagdeviren C. An Emerging Era: Conformable Ultrasound Electronics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2307664. [PMID: 37792426 DOI: 10.1002/adma.202307664] [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: 07/31/2023] [Revised: 09/19/2023] [Indexed: 10/05/2023]
Abstract
Conformable electronics are regarded as the next generation of personal healthcare monitoring and remote diagnosis devices. In recent years, piezoelectric-based conformable ultrasound electronics (cUSE) have been intensively studied due to their unique capabilities, including nonradiative monitoring, soft tissue imaging, deep signal decoding, wireless power transfer, portability, and compatibility. This review provides a comprehensive understanding of cUSE for use in biomedical and healthcare monitoring systems and a summary of their recent advancements. Following an introduction to the fundamentals of piezoelectrics and ultrasound transducers, the critical parameters for transducer design are discussed. Next, five types of cUSE with their advantages and limitations are highlighted, and the fabrication of cUSE using advanced technologies is discussed. In addition, the working function, acoustic performance, and accomplishments in various applications are thoroughly summarized. It is noted that application considerations must be given to the tradeoffs between material selection, manufacturing processes, acoustic performance, mechanical integrity, and the entire integrated system. Finally, current challenges and directions for the development of cUSE are highlighted, and research flow is provided as the roadmap for future research. In conclusion, these advances in the fields of piezoelectric materials, ultrasound transducers, and conformable electronics spark an emerging era of biomedicine and personal healthcare.
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Affiliation(s)
- Lin Zhang
- Media Lab, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Wenya Du
- Media Lab, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Jin-Hoon Kim
- Media Lab, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Chia-Chen Yu
- Media Lab, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Canan Dagdeviren
- Media Lab, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
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Song X, Zhong W, Li Z, Peng S, Zhang H, Wang G, Dong J, Liu X, Xu X, Liu Q. Accelerated model-based iterative reconstruction strategy for sparse-view photoacoustic tomography aided by multi-channel autoencoder priors. JOURNAL OF BIOPHOTONICS 2024; 17:e202300281. [PMID: 38010827 DOI: 10.1002/jbio.202300281] [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: 07/19/2023] [Revised: 11/06/2023] [Accepted: 11/07/2023] [Indexed: 11/29/2023]
Abstract
Photoacoustic tomography (PAT) commonly works in sparse view due to data acquisition limitations. However, reconstruction suffers from serious deterioration (e.g., severe artifacts) using traditional algorithms under sparse view. Here, a novel accelerated model-based iterative reconstruction strategy for sparse-view PAT aided by multi-channel autoencoder priors was proposed. A multi-channel denoising autoencoder network was designed to learn prior information, which provides constraints for model-based iterative reconstruction. This integration accelerates the iteration process, leading to optimal reconstruction outcomes. The performance of the proposed method was evaluated using blood vessel simulation data and experimental data. The results show that the proposed method can achieve superior sparse-view reconstruction with a significant acceleration of iteration. Notably, the proposed method exhibits excellent performance under extremely sparse condition (e.g., 32 projections) compared with the U-Net method, with an improvement of 48% in PSNR and 12% in SSIM for in vivo experimental data.
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Affiliation(s)
- Xianlin Song
- School of Information Engineering, Nanchang University, Nanchang, China
| | - Wenhua Zhong
- School of Information Engineering, Nanchang University, Nanchang, China
| | - Zilong Li
- School of Information Engineering, Nanchang University, Nanchang, China
| | - Shuchong Peng
- Ji luan Academy, Nanchang University, Nanchang, China
| | - Hongyu Zhang
- School of Information Engineering, Nanchang University, Nanchang, China
| | - Guijun Wang
- School of Information Engineering, Nanchang University, Nanchang, China
| | - Jiaqing Dong
- School of Information Engineering, Nanchang University, Nanchang, China
| | - Xuan Liu
- School of Information Engineering, Nanchang University, Nanchang, China
| | - Xiaoling Xu
- School of Information Engineering, Nanchang University, Nanchang, China
| | - Qiegen Liu
- School of Information Engineering, Nanchang University, Nanchang, China
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Sweeney A, Arora A, Edwards S, Mallidi S. Ultrasound-guided Photoacoustic image Annotation Toolkit in MATLAB (PHANTOM) for preclinical applications. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.07.565885. [PMID: 37986998 PMCID: PMC10659350 DOI: 10.1101/2023.11.07.565885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Depth-dependent fluence-compensation in photoacoustic (PA) imaging is paramount for accurate quantification of chromophores from deep tissues. Here we present a user-friendly toolkit named PHANTOM (PHotoacoustic ANnotation TOolkit for MATLAB) that includes a graphical interface and assists in the segmentation of ultrasound-guided PA images. We modelled the light source configuration with Monte Carlo eXtreme and utilized 3D segmented tissues from ultrasound to generate fluence maps to depth compensate PA images. The methodology was used to analyze PA images of phantoms with varying blood oxygenation and results were validated with oxygen electrode measurements. Two preclinical models, a subcutaneous tumor and a calcified placenta, were imaged and fluence-compensated using the PHANTOM toolkit and the results were verified with immunohistochemistry. The PHANTOM toolkit provides scripts and auxiliary functions to enable biomedical researchers not specialized in optical imaging to apply fluence correction to PA images, enhancing accessibility of quantitative PAI for researchers in various fields.
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Affiliation(s)
- Allison Sweeney
- Department of Biomedical Engineering, Tufts University, Medford, MA, United States
| | - Aayush Arora
- Department of Biomedical Engineering, Tufts University, Medford, MA, United States
| | - Skye Edwards
- Department of Biomedical Engineering, Tufts University, Medford, MA, United States
| | - Srivalleesha Mallidi
- Department of Biomedical Engineering, Tufts University, Medford, MA, United States
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, United States
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6
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Lin X, Shi H, Fan X, Wang J, Fu Z, Chen Y, Chen S, Chen X, Chen M. Handheld interventional ultrasound/photoacoustic puncture needle navigation based on deep learning segmentation. BIOMEDICAL OPTICS EXPRESS 2023; 14:5979-5993. [PMID: 38021141 PMCID: PMC10659795 DOI: 10.1364/boe.504999] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/08/2023] [Accepted: 10/18/2023] [Indexed: 12/01/2023]
Abstract
Interventional ultrasound (US) has challenges in accurate localization of the puncture needle due to intrinsic acoustic interferences, which lead to blurred, indistinct, and even invisible needles in handheld linear array transducer-based US navigation, especially the incorrect needle tip positioning. Photoacoustic (PA) imaging can provide complementary image contrast, without additional data acquisition. Herein, we proposed an internal illumination to solely light up the needle tip in PA imaging. Then deep-learning-based feature segmentation alleviates acoustic interferences, enhancing the needle shaft-tip visibility. Further, needle shaft-tip compensation aligned the needle shaft in US image and the needle tip in the PA image. The experiments on phantom, ex vivo chicken breast, preclinical radiofrequency ablation and in vivo biopsy of sentinel lymph nodes were piloted. The target registration error can reach the submillimeter level, achieving precise puncture needle tracking ability with in-plane US/PA navigation.
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Affiliation(s)
- Xiangwei Lin
- School of Biomedical Engineering, Shenzhen University, 1066 Xueyuan Ave, Shenzhen 518057, China
| | - Hongji Shi
- School of Biomedical Engineering, Shenzhen University, 1066 Xueyuan Ave, Shenzhen 518057, China
| | - Xiaozhou Fan
- Department of Ultrasound, Air Force Medical Center, Air Force Medical University, 30 Fucheng Road, Beijing 100142, China
| | - Jiaxin Wang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, 11 Huandong Road, Beijing 102488, China
| | - Zhenyu Fu
- School of Biomedical Engineering, Shenzhen University, 1066 Xueyuan Ave, Shenzhen 518057, China
| | - Yuqing Chen
- School of Biomedical Engineering, Shenzhen University, 1066 Xueyuan Ave, Shenzhen 518057, China
| | - Siping Chen
- School of Biomedical Engineering, Shenzhen University, 1066 Xueyuan Ave, Shenzhen 518057, China
| | - Xin Chen
- School of Biomedical Engineering, Shenzhen University, 1066 Xueyuan Ave, Shenzhen 518057, China
| | - Mian Chen
- School of Biomedical Engineering, Shenzhen University, 1066 Xueyuan Ave, Shenzhen 518057, China
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7
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Brock KK, Chen SR, Sheth RA, Siewerdsen JH. Imaging in Interventional Radiology: 2043 and Beyond. Radiology 2023; 308:e230146. [PMID: 37462500 PMCID: PMC10374939 DOI: 10.1148/radiol.230146] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 04/27/2023] [Accepted: 04/28/2023] [Indexed: 07/21/2023]
Abstract
Since its inception in the early 20th century, interventional radiology (IR) has evolved tremendously and is now a distinct clinical discipline with its own training pathway. The arsenal of modalities at work in IR includes x-ray radiography and fluoroscopy, CT, MRI, US, and molecular and multimodality imaging within hybrid interventional environments. This article briefly reviews the major developments in imaging technology in IR over the past century, summarizes technologies now representative of the standard of care, and reflects on emerging advances in imaging technology that could shape the field in the century ahead. The role of emergent imaging technologies in enabling high-precision interventions is also briefly reviewed, including image-guided ablative therapies.
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Affiliation(s)
- Kristy K. Brock
- From the Departments of Imaging Physics (K.K.B., J.H.S.),
Interventional Radiology (S.R.C., R.A.S.), Neurosurgery (J.H.S.), and Radiation
Physics (J.H.S.), The University of Texas MD Anderson Cancer Center, 1400
Pressler St, FCT14.6050 Pickens Academic Tower, Houston, TX 77030-4000
| | - Stephen R. Chen
- From the Departments of Imaging Physics (K.K.B., J.H.S.),
Interventional Radiology (S.R.C., R.A.S.), Neurosurgery (J.H.S.), and Radiation
Physics (J.H.S.), The University of Texas MD Anderson Cancer Center, 1400
Pressler St, FCT14.6050 Pickens Academic Tower, Houston, TX 77030-4000
| | - Rahul A. Sheth
- From the Departments of Imaging Physics (K.K.B., J.H.S.),
Interventional Radiology (S.R.C., R.A.S.), Neurosurgery (J.H.S.), and Radiation
Physics (J.H.S.), The University of Texas MD Anderson Cancer Center, 1400
Pressler St, FCT14.6050 Pickens Academic Tower, Houston, TX 77030-4000
| | - Jeffrey H. Siewerdsen
- From the Departments of Imaging Physics (K.K.B., J.H.S.),
Interventional Radiology (S.R.C., R.A.S.), Neurosurgery (J.H.S.), and Radiation
Physics (J.H.S.), The University of Texas MD Anderson Cancer Center, 1400
Pressler St, FCT14.6050 Pickens Academic Tower, Houston, TX 77030-4000
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Jung U, Ryu J, Choi H. Optical Light Sources and Wavelengths within the Visible and Near-Infrared Range Using Photoacoustic Effects for Biomedical Applications. BIOSENSORS 2022; 12:bios12121154. [PMID: 36551121 PMCID: PMC9775951 DOI: 10.3390/bios12121154] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 11/29/2022] [Accepted: 12/02/2022] [Indexed: 06/01/2023]
Abstract
The photoacoustic (PA) effect occurs when sound waves are generated by light according to the thermodynamic and optical properties of the materials; they are absorption spectroscopic techniques that can be applied to characterize materials that absorb pulse or continuous wave (CW)-modulated electromagnetic radiation. In addition, the wavelengths and properties of the incident light significantly impact the signal-to-ratio and contrast with photoacoustic signals. In this paper, we reviewed how absorption spectroscopic research results have been used in applying actual photoacoustic effects, focusing on light sources of each wavelength. In addition, the characteristics and compositions of the light sources used for the applications were investigated and organized based on the absorption spectrum of the target materials. Therefore, we expect that this study will help researchers (who desire to study photoacoustic effects) to more efficiently approach the appropriate conditions or environments for selecting the target materials and light sources.
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Affiliation(s)
- Unsang Jung
- Production Technology Research Center, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi 39177, Gyeongsangbuk-do, Republic of Korea
| | - Jaemyung Ryu
- Department of Optical Engineering, Kumoh National Institute of Technology, 350-27 Gumi-daero, Gumi 39253, Gyeongsangbuk-do, Republic of Korea
| | - Hojong Choi
- Department of Electronic Engineering, Gachon University, Seongnam-daero, Sujeong-gu, Seongnam 13420, Gyeonggi-do, Republic of Korea
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Nguyen CD, Edwards SA, Iorizzo TW, Longo BN, Yaroslavsky AN, Kaplan DL, Mallidi S. Investigation of silk as a phantom material for ultrasound and photoacoustic imaging. PHOTOACOUSTICS 2022; 28:100416. [PMID: 36386295 PMCID: PMC9649953 DOI: 10.1016/j.pacs.2022.100416] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 10/09/2022] [Accepted: 10/11/2022] [Indexed: 05/13/2023]
Abstract
Comprehensive characterization of biomedical imaging systems require phantoms that are easy to fabricate and can mimic human tissue. Additionally, with the arrival of engineered tissues, it is key to develop phantoms that can mimic bioengineered samples. In ultrasound and photoacoustic imaging, water-soluble phantom materials such as gelatin undergo rapid degradation while polymer-based materials such as polyvinyl alcohol are not conducive for generating bioengineered tissues that can incorporate cells. Here we propose silk protein-based hydrogels as an ultrasound and photoacoustic phantom material that has potential to provide a 3D environment for long-term sustainable cell growth. Common acoustic, optical, and biomechanical properties such as ultrasound attenuation, reduced scattering coefficient, and Young's modulus were measured. The results indicate that silk acoustically mimics many tissue types while exhibiting similar reduced optical scattering in the wavelength range of 400-1200 nm. Furthermore, silk-based materials can be stored long-term with no change in acoustic and optical properties, and hence can be utilized to assess the performance of ultrasound and photoacoustic systems.
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Affiliation(s)
| | - Skye A. Edwards
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155, USA
| | - Tyler W. Iorizzo
- Department of Physics, University of Massachusetts Lowell, Lowell, MA 01854 USA
| | - Brooke N. Longo
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155, USA
| | - Anna N. Yaroslavsky
- Department of Physics, University of Massachusetts Lowell, Lowell, MA 01854 USA
| | - David L. Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155, USA
| | - Srivalleesha Mallidi
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155, USA
- Corresponding author.
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Wen Y, Guo D, Zhang J, Liu X, Liu T, Li L, Jiang S, Wu D, Jiang H. Clinical photoacoustic/ultrasound dual-modal imaging: Current status and future trends. Front Physiol 2022; 13:1036621. [PMID: 36388111 PMCID: PMC9651137 DOI: 10.3389/fphys.2022.1036621] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Accepted: 10/05/2022] [Indexed: 08/24/2023] Open
Abstract
Photoacoustic tomography (PAT) is an emerging biomedical imaging modality that combines optical and ultrasonic imaging, providing overlapping fields of view. This hybrid approach allows for a natural integration of PAT and ultrasound (US) imaging in a single platform. Due to the similarities in signal acquisition and processing, the combination of PAT and US imaging creates a new hybrid imaging for novel clinical applications. Over the recent years, particular attention is paid to the development of PAT/US dual-modal systems highlighting mutual benefits in clinical cases, with an aim of substantially improving the specificity and sensitivity for diagnosis of diseases. The demonstrated feasibility and accuracy in these efforts open an avenue of translating PAT/US imaging to practical clinical applications. In this review, the current PAT/US dual-modal imaging systems are discussed in detail, and their promising clinical applications are presented and compared systematically. Finally, this review describes the potential impacts of these combined systems in the coming future.
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Affiliation(s)
- Yanting Wen
- Department of Ultrasound Imaging, The Fifth People’s Hospital of Chengdu, Chengdu, China
- School of Computer Science and Technology, Chongqing University of Posts and Telecommunications, Chongqing, China
| | - Dan Guo
- Department of Ultrasound Imaging, The Fifth People’s Hospital of Chengdu, Chengdu, China
| | - Jing Zhang
- Department of Ultrasound Imaging, The Fifth People’s Hospital of Chengdu, Chengdu, China
- School of Computer Science and Technology, Chongqing University of Posts and Telecommunications, Chongqing, China
| | - Xiaotian Liu
- Department of Ultrasound Imaging, The Fifth People’s Hospital of Chengdu, Chengdu, China
| | - Ting Liu
- Department of Ultrasound Imaging, The Fifth People’s Hospital of Chengdu, Chengdu, China
| | - Lu Li
- Department of Ultrasound Imaging, The Fifth People’s Hospital of Chengdu, Chengdu, China
| | - Shixie Jiang
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, United States
| | - Dan Wu
- School of Computer Science and Technology, Chongqing University of Posts and Telecommunications, Chongqing, China
| | - Huabei Jiang
- Department of Medical Engineering, University of South Florida, Tampa, FL, United States
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Wiacek A, Wang KC, Wu H, Bell MAL. Photoacoustic-Guided Laparoscopic and Open Hysterectomy Procedures Demonstrated With Human Cadavers. IEEE TRANSACTIONS ON MEDICAL IMAGING 2021; 40:3279-3292. [PMID: 34018931 DOI: 10.1109/tmi.2021.3082555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Hysterectomy (i.e., surgical removal of the uterus) requires severing the main blood supply to the uterus (i.e., the uterine arteries) while preserving the nearby, often overlapping, ureters. In this paper, we investigate dual-wavelength and audiovisual photoacoustic imaging-based approaches to visualize and differentiate the ureter from the uterine artery and to provide the real-time information needed to avoid accidental ureteral injuries during hysterectomies. Dual-wavelength 690/750 nm photoacoustic imaging was implemented during laparoscopic and open hysterectomies performed on human cadavers, with a custom display approach designed to visualize the ureter and uterine artery. The proximity of the surgical tool to the ureter was calculated and conveyed by tracking the surgical tool in photoacoustic images and mapping distance to auditory signals. The dual-wavelength display showed up to 10 dB contrast differences between the ureter and uterine artery at three separation distances (i.e., 4 mm, 5 mm, and 6 mm) during the open hysterectomy. During the laparoscopic hysterectomy, the ureter and uterine artery were visualized in the dual-wavelength image with up to 24 dB contrast differences. Distances between the ureter and the surgical tool ranged from 2.47 to 7.31 mm. These results are promising for the introduction of dual-wavelength photoacoustic imaging to differentiate the ureter from the uterine artery, estimate the position of the ureter relative to a surgical tool tip, map photoacoustic-based distance measurements to auditory signals, and ultimately guide hysterectomy procedures to reduce the risk of accidental ureteral injuries.
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Clinically translatable quantitative molecular photoacoustic imaging with liposome-encapsulated ICG J-aggregates. Nat Commun 2021; 12:5410. [PMID: 34518530 PMCID: PMC8438038 DOI: 10.1038/s41467-021-25452-3] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 08/11/2021] [Indexed: 02/08/2023] Open
Abstract
Photoacoustic (PA) imaging is a functional and molecular imaging technique capable of high sensitivity and spatiotemporal resolution at depth. Widespread use of PA imaging, however, is limited by currently available contrast agents, which either lack PA-signal-generation ability for deep imaging or their absorbance spectra overlap with hemoglobin, reducing sensitivity. Here we report on a PA contrast agent based on targeted liposomes loaded with J-aggregated indocyanine green (ICG) dye (i.e., PAtrace) that we synthesized, bioconjugated, and characterized to addresses these limitations. We then validated PAtrace in phantom, in vitro, and in vivo PA imaging environments for both spectral unmixing accuracy and targeting efficacy in a folate receptor alpha-positive ovarian cancer model. These study results show that PAtrace concurrently provides significantly improved contrast-agent quantification/sensitivity and SO2 estimation accuracy compared to monomeric ICG. PAtrace's performance attributes and composition of FDA-approved components make it a promising agent for future clinical molecular PA imaging.
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13
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Amidi E, Yang G, Uddin KMS, Luo H, Middleton W, Powell M, Siegel C, Zhu Q. Role of blood oxygenation saturation in ovarian cancer diagnosis using multi-spectral photoacoustic tomography. JOURNAL OF BIOPHOTONICS 2021; 14:e202000368. [PMID: 33377620 PMCID: PMC8044001 DOI: 10.1002/jbio.202000368] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 12/18/2020] [Accepted: 12/19/2020] [Indexed: 05/05/2023]
Abstract
In photoacoustic tomography (PAT), a tunable laser typically illuminates the tissue at multiple wavelengths, and the received photoacoustic waves are used to form functional images of relative total haemoglobin (rHbT) and blood oxygenation saturation (%sO2 ). Due to measurement errors, the estimation of these parameters can be challenging, especially in clinical studies. In this study, we use a multi-pixel method to smooth the measurements before calculating rHbT and %sO2 . We first perform phantom studies using blood tubes of calibrated %sO2 to evaluate the accuracy of our %sO2 estimation. We conclude by presenting diagnostic results from PAT of 33 patients with 51 ovarian masses imaged by our co-registered PAT and ultrasound system. The ovarian masses were divided into malignant and benign/normal groups. Functional maps of rHbT and %sO2 and their histograms as well as spectral features were calculated using the PAT data from all ovaries in these two groups. Support vector machine models were trained on different combinations of the significant features. The area under ROC (AUC) of 0.93 (0.95%CI: 0.90-0.96) on the testing data set was achieved by combining mean %sO2 , a spectral feature, and the score of the study radiologist.
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Affiliation(s)
- Eghbal Amidi
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri
| | - Guang Yang
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri
| | - K. M. Shihab Uddin
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri
| | - Hongbo Luo
- Department of Electrical and System Engineering, Washington University in St. Louis, St. Louis, Missouri
| | - William Middleton
- Department of Radiology, Washington University School of Medicine, St. Louis, Missouri
| | - Matthew Powell
- Division of Gynecological Oncology, Washington University School of Medicine, St. Louis, Missouri
| | - Cary Siegel
- Department of Radiology, Washington University School of Medicine, St. Louis, Missouri
| | - Quing Zhu
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri
- Department of Radiology, Washington University School of Medicine, St. Louis, Missouri
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14
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Wiacek A, Lediju Bell MA. Photoacoustic-guided surgery from head to toe [Invited]. BIOMEDICAL OPTICS EXPRESS 2021; 12:2079-2117. [PMID: 33996218 PMCID: PMC8086464 DOI: 10.1364/boe.417984] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 02/17/2021] [Accepted: 02/18/2021] [Indexed: 05/04/2023]
Abstract
Photoacoustic imaging-the combination of optics and acoustics to visualize differences in optical absorption - has recently demonstrated strong viability as a promising method to provide critical guidance of multiple surgeries and procedures. Benefits include its potential to assist with tumor resection, identify hemorrhaged and ablated tissue, visualize metal implants (e.g., needle tips, tool tips, brachytherapy seeds), track catheter tips, and avoid accidental injury to critical subsurface anatomy (e.g., major vessels and nerves hidden by tissue during surgery). These benefits are significant because they reduce surgical error, associated surgery-related complications (e.g., cancer recurrence, paralysis, excessive bleeding), and accidental patient death in the operating room. This invited review covers multiple aspects of the use of photoacoustic imaging to guide both surgical and related non-surgical interventions. Applicable organ systems span structures within the head to contents of the toes, with an eye toward surgical and interventional translation for the benefit of patients and for use in operating rooms and interventional suites worldwide. We additionally include a critical discussion of complete systems and tools needed to maximize the success of surgical and interventional applications of photoacoustic-based technology, spanning light delivery, acoustic detection, and robotic methods. Multiple enabling hardware and software integration components are also discussed, concluding with a summary and future outlook based on the current state of technological developments, recent achievements, and possible new directions.
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Affiliation(s)
- Alycen Wiacek
- Department of Electrical and Computer Engineering, 3400 N. Charles St., Johns Hopkins University, Baltimore, MD 21218, USA
| | - Muyinatu A. Lediju Bell
- Department of Electrical and Computer Engineering, 3400 N. Charles St., Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Biomedical Engineering, 3400 N. Charles St., Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Computer Science, 3400 N. Charles St., Johns Hopkins University, Baltimore, MD 21218, USA
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15
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Huang J, Wiacek A, Kempski KM, Palmer T, Izzi J, Beck S, Lediju Bell MA. Empirical assessment of laser safety for photoacoustic-guided liver surgeries. BIOMEDICAL OPTICS EXPRESS 2021; 12:1205-1216. [PMID: 33796347 PMCID: PMC7984790 DOI: 10.1364/boe.415054] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/19/2021] [Accepted: 01/19/2021] [Indexed: 05/03/2023]
Abstract
Photoacoustic imaging is a promising technique to provide guidance during multiple surgeries and procedures. One challenge with this technique is that major blood vessels in the liver are difficult to differentiate from surrounding tissue within current safety limits, which only exist for human skin and eyes. In this paper, we investigate the safety of raising this limit for liver tissue excited with a 750 nm laser wavelength and approximately 30 mJ laser energy (corresponding to approximately 150 mJ/cm2 fluence). Laparotomies were performed on six swine to empirically investigate potential laser-related liver damage. Laser energy was applied for temporal durations of 1 minute, 10 minutes, and 20 minutes. Lasered liver lobes were excised either immediately after laser application (3 swine) or six weeks after surgery (3 swine). Cell damage was assessed using liver damage blood biomarkers and histopathology analyses of 41 tissue samples total. The biomarkers were generally normal over a 6 week post-surgical in vivo study period. Histopathology revealed no cell death, although additional pathology was present (i.e., hemorrhage, inflammation, fibrosis) due to handling, sample resection, and fibrous adhesions as a result of the laparotomy. These results support a new protocol for studying laser-related liver damage, indicating the potential to raise the safety limit for liver photoacoustic imaging to approximately 150 mJ/cm2 with a laser wavelength of 750 nm and for imaging durations up to 10 minutes without causing cell death. This investigation and protocol may be applied to other tissues and extended to additional wavelengths and energies, which is overall promising for introducing new tissue-specific laser safety limits for photoacoustic-guided surgery.
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Affiliation(s)
- Jiaqi Huang
- Department of Biomedical Engineering,
Johns Hopkins University, Baltimore, MD
21218, USA
| | - Alycen Wiacek
- Department of Electrical and Computer
Engineering, Johns Hopkins University,
Baltimore, MD 21218, USA
| | - Kelley M. Kempski
- Department of Biomedical Engineering,
Johns Hopkins University, Baltimore, MD
21218, USA
| | - Theron Palmer
- Department of Biomedical Engineering,
Johns Hopkins University, Baltimore, MD
21218, USA
| | - Jessica Izzi
- Department of Molecular and Comparative
Pathobiology, Johns Hopkins University,
Baltimore, MD 21218, USA
| | - Sarah Beck
- Department of Molecular and Comparative
Pathobiology, Johns Hopkins University,
Baltimore, MD 21218, USA
| | - Muyinatu A. Lediju Bell
- Department of Biomedical Engineering,
Johns Hopkins University, Baltimore, MD
21218, USA
- Department of Electrical and Computer
Engineering, Johns Hopkins University,
Baltimore, MD 21218, USA
- Department of Computer Science,
Johns Hopkins University, Baltimore, MD
21218, USA
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16
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Mukaddim RA, Varghese T. Spatiotemporal Coherence Weighting for In Vivo Cardiac Photoacoustic Image Beamformation. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2021; 68:586-598. [PMID: 32795968 PMCID: PMC8011040 DOI: 10.1109/tuffc.2020.3016900] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Photoacoustic (PA) image reconstruction generally utilizes delay-and-sum (DAS) beamforming of received acoustic waves from tissue irradiated with optical illumination. However, nonadaptive DAS reconstructed cardiac PA images exhibit temporally varying noise which causes reduced myocardial PA signal specificity, making image interpretation difficult. Adaptive beamforming algorithms such as minimum variance (MV) with coherence factor (CF) weighting have been previously reported to improve the DAS image quality. In this article, we report on an adaptive beamforming algorithm by extending CF weighting to the temporal domain for preclinical cardiac PA imaging (PAI). The proposed spatiotemporal coherence factor (STCF) considers multiple temporally adjacent image acquisition events during beamforming and cancels out signals with low spatial coherence and temporal coherence, resulting in higher background noise cancellation while preserving the main features of interest (myocardial wall) in the resultant PA images. STCF has been validated using the numerical simulations and in vivo ECG and respiratory-signal-gated cardiac PAI in healthy murine hearts. The numerical simulation results demonstrate that STCF weighting outperforms DAS and MV beamforming with and without CF weighting under different levels of inherent contrast, acoustic attenuation, optical scattering, and signal-to-noise (SNR) of channel data. Performance improvement is attributed to higher sidelobe reduction (at least 5 dB) and SNR improvement (at least 10 dB). Improved myocardial signal specificity and higher signal rejection in the left ventricular chamber and acoustic gel region are observed with STCF in cardiac PAI.
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17
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Kubelick KP, Emelianov SY. A Trimodal Ultrasound, Photoacoustic and Magnetic Resonance Imaging Approach for Longitudinal Post-operative Monitoring of Stem Cells in the Spinal Cord. ULTRASOUND IN MEDICINE & BIOLOGY 2020; 46:3468-3474. [PMID: 32988671 PMCID: PMC7709928 DOI: 10.1016/j.ultrasmedbio.2020.08.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 08/10/2020] [Accepted: 08/25/2020] [Indexed: 06/11/2023]
Abstract
Longitudinal monitoring of stem cells in the spinal cord could unveil critical information needed to understand regenerative processes, thereby expediting therapy development and translation. We introduce a post-operative trimodal imaging approach to monitor stem cells in the spinal cord over time. A key aspect of the approach is to label the stem cells with Prussian blue nanocubes (PBNCs), which simultaneously possess optical and magnetic properties for ultrasound-guided photoacoustic (US/PA) and magnetic resonance imaging (MRI) contrast. PBNC-Labeled stem cells were injected into the spinal cord of immunodeficient rats and tracked with US/PA imaging and MRI up to 14 d post-injection. Good agreement was observed between imaging modalities in vivo. Our results suggest that further development of the US/PA/MR imaging approach may create a powerful tool to aid development of regenerative therapies of the spinal cord, and the non-invasive imaging approach can ultimately be deployed in intra- and post-operative environments.
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Affiliation(s)
- Kelsey P Kubelick
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, Georgia, USA; School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA.
| | - Stanislav Y Emelianov
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, Georgia, USA; School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA.
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18
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Wang S, Zhao Y, Xu Y. Recent advances in applications of multimodal ultrasound-guided photoacoustic imaging technology. Vis Comput Ind Biomed Art 2020; 3:24. [PMID: 33083889 PMCID: PMC7575676 DOI: 10.1186/s42492-020-00061-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 10/02/2020] [Indexed: 12/28/2022] Open
Abstract
Photoacoustic imaging (PAI) is often performed simultaneously with ultrasound imaging and can provide functional and cellular information regarding the tissues in the anatomical markers of the imaging. This paper describes in detail the basic principles of photoacoustic/ultrasound (PA/US) imaging and its application in recent years. It includes near-infrared-region PA, photothermal, photodynamic, and multimode imaging techniques. Particular attention is given to the relationship between PAI and ultrasonic imaging; the latest high-frequency PA/US imaging of small animals, which involves not only B-mode, but also color Doppler mode, power Doppler mode, and nonlinear imaging mode; the ultrasonic model combined with PAI, including the formation of multimodal imaging; the preclinical imaging methods; and the most effective detection methods for clinical research for the future.
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Affiliation(s)
- Shanshan Wang
- VisualSonics Business Department, FUJIFILM (China) Investment Co. Ltd., Beijing, 100026, China.
| | - Yunfeng Zhao
- VisualSonics Business Department, FUJIFILM (China) Investment Co. Ltd., Shanghai, 200120, China
| | - Ye Xu
- VisualSonics Business Department, FUJIFILM (China) Investment Co. Ltd., Shanghai, 200120, China
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19
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Lediju Bell MA. Photoacoustic imaging for surgical guidance: Principles, applications, and outlook. JOURNAL OF APPLIED PHYSICS 2020; 128:060904. [PMID: 32817994 PMCID: PMC7428347 DOI: 10.1063/5.0018190] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 07/30/2020] [Indexed: 05/08/2023]
Abstract
Minimally invasive surgeries often require complicated maneuvers and delicate hand-eye coordination and ideally would incorporate "x-ray vision" to see beyond tool tips and underneath tissues prior to making incisions. Photoacoustic imaging has the potential to offer this feature but not with ionizing x-rays. Instead, optical fibers and acoustic receivers enable photoacoustic sensing of major structures-such as blood vessels and nerves-that are otherwise hidden from view. This imaging process is initiated by transmitting laser pulses that illuminate regions of interest, causing thermal expansion and the generation of sound waves that are detectable with conventional ultrasound transducers. The recorded signals are then converted to images through the beamforming process. Photoacoustic imaging may be implemented to both target and avoid blood-rich surgical contents (and in some cases simultaneously or independently visualize optical fiber tips or metallic surgical tool tips) in order to prevent accidental injury and assist device operators during minimally invasive surgeries and interventional procedures. Novel light delivery systems, counterintuitive findings, and robotic integration methods introduced by the Photoacoustic & Ultrasonic Systems Engineering Lab are summarized in this invited Perspective, setting the foundation and rationale for the subsequent discussion of the author's views on possible future directions for this exciting frontier known as photoacoustic-guided surgery.
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Affiliation(s)
- Muyinatu A. Lediju Bell
- Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
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20
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Gonzalez EA, Bell MAL. GPU implementation of photoacoustic short-lag spatial coherence imaging for improved image-guided interventions. JOURNAL OF BIOMEDICAL OPTICS 2020; 25:1-19. [PMID: 32713168 PMCID: PMC7381831 DOI: 10.1117/1.jbo.25.7.077002] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 06/29/2020] [Indexed: 05/04/2023]
Abstract
SIGNIFICANCE Photoacoustic-based visual servoing is a promising technique for surgical tool tip tracking and automated visualization of photoacoustic targets during interventional procedures. However, one outstanding challenge has been the reliability of obtaining segmentations using low-energy light sources that operate within existing laser safety limits. AIM We developed the first known graphical processing unit (GPU)-based real-time implementation of short-lag spatial coherence (SLSC) beamforming for photoacoustic imaging and applied this real-time algorithm to improve signal segmentation during photoacoustic-based visual servoing with low-energy lasers. APPROACH A 1-mm-core-diameter optical fiber was inserted into ex vivo bovine tissue. Photoacoustic-based visual servoing was implemented as the fiber was manually displaced by a translation stage, which provided ground truth measurements of the fiber displacement. GPU-SLSC results were compared with a central processing unit (CPU)-SLSC approach and an amplitude-based delay-and-sum (DAS) beamforming approach. Performance was additionally evaluated with in vivo cardiac data. RESULTS The GPU-SLSC implementation achieved frame rates up to 41.2 Hz, representing a factor of 348 speedup when compared with offline CPU-SLSC. In addition, GPU-SLSC successfully recovered low-energy signals (i.e., ≤268 μJ) with mean ± standard deviation of signal-to-noise ratios of 11.2 ± 2.4 (compared with 3.5 ± 0.8 with conventional DAS beamforming). When energies were lower than the safety limit for skin (i.e., 394.6 μJ for 900-nm wavelength laser light), the median and interquartile range (IQR) of visual servoing tracking errors obtained with GPU-SLSC were 0.64 and 0.52 mm, respectively (which were lower than the median and IQR obtained with DAS by 1.39 and 8.45 mm, respectively). GPU-SLSC additionally reduced the percentage of failed segmentations when applied to in vivo cardiac data. CONCLUSIONS Results are promising for the use of low-energy, miniaturized lasers to perform GPU-SLSC photoacoustic-based visual servoing in the operating room with laser pulse repetition frequencies as high as 41.2 Hz.
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Affiliation(s)
- Eduardo A. Gonzalez
- Johns Hopkins University, School of Medicine, Department of Biomedical Engineering, Baltimore, Maryland, United States
| | - Muyinatu A. Lediju Bell
- Johns Hopkins University, School of Medicine, Department of Biomedical Engineering, Baltimore, Maryland, United States
- Johns Hopkins University, Whiting School of Engineering, Department of Electrical and Computer Engineering, Baltimore, Maryland, United States
- Johns Hopkins University, Whiting School of Engineering, Department of Computer Science, Baltimore, Maryland, United States
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21
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Kempski KM, Graham MT, Gubbi MR, Palmer T, Lediju Bell MA. Application of the generalized contrast-to-noise ratio to assess photoacoustic image quality. BIOMEDICAL OPTICS EXPRESS 2020; 11:3684-3698. [PMID: 33014560 PMCID: PMC7510924 DOI: 10.1364/boe.391026] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 05/01/2020] [Accepted: 05/25/2020] [Indexed: 05/10/2023]
Abstract
The generalized contrast-to-noise ratio (gCNR) is a relatively new image quality metric designed to assess the probability of lesion detectability in ultrasound images. Although gCNR was initially demonstrated with ultrasound images, the metric is theoretically applicable to multiple types of medical images. In this paper, the applicability of gCNR to photoacoustic images is investigated. The gCNR was computed for both simulated and experimental photoacoustic images generated by amplitude-based (i.e., delay-and-sum) and coherence-based (i.e., short-lag spatial coherence) beamformers. These gCNR measurements were compared to three more traditional image quality metrics (i.e., contrast, contrast-to-noise ratio, and signal-to-noise ratio) applied to the same datasets. An increase in qualitative target visibility generally corresponded with increased gCNR. In addition, gCNR magnitude was more directly related to the separability of photoacoustic signals from their background, which degraded with the presence of limited bandwidth artifacts and increased levels of channel noise. At high gCNR values (i.e., 0.95-1), contrast, contrast-to-noise ratio, and signal-to-noise ratio varied by up to 23.7-56.2 dB, 2.0-3.4, and 26.5-7.6×1020, respectively, for simulated, experimental phantom, and in vivo data. Therefore, these traditional metrics can experience large variations when a target is fully detectable, and additional increases in these values would have no impact on photoacoustic target detectability. In addition, gCNR is robust to changes in traditional metrics introduced by applying a minimum threshold to image amplitudes. In tandem with other photoacoustic image quality metrics and with a defined range of 0 to 1, gCNR has promising potential to provide additional insight, particularly when designing new beamformers and image formation techniques and when reporting quantitative performance without an opportunity to qualitatively assess corresponding images (e.g., in text-only abstracts).
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Affiliation(s)
- Kelley M Kempski
- Biomedical Engineering Department, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Michelle T Graham
- Electrical & Computer Engineering Department, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Mardava R Gubbi
- Electrical & Computer Engineering Department, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Theron Palmer
- Biomedical Engineering Department, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Muyinatu A Lediju Bell
- Biomedical Engineering Department, Johns Hopkins University, Baltimore, MD 21218, USA
- Electrical & Computer Engineering Department, Johns Hopkins University, Baltimore, MD 21218, USA
- Computer Science Department, Johns Hopkins University, Baltimore, MD 21218, USA
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22
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de Leon A, Wei P, Bordera F, Wegierak D, McMillen M, Yan D, Hemmingsen C, Kolios MC, Pentzer EB, Exner AA. Pickering Bubbles as Dual-Modality Ultrasound and Photoacoustic Contrast Agents. ACS APPLIED MATERIALS & INTERFACES 2020; 12:22308-22317. [PMID: 32307987 PMCID: PMC8985135 DOI: 10.1021/acsami.0c02091] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Microbubbles (MBs) stabilized by particle surfactants (i.e., Pickering bubbles) have better thermodynamic stability compared to MBs stabilized by small molecules as a result of steric hindrance against coalescence, higher diffusion resistance, and higher particle desorption energy. In addition, the use of particles to stabilize MBs that are typically used as an ultrasound (US) contrast agent can also introduce photoacoustic (PA) properties, thus enabling a highly effective dual-modality US and PA contrast agent. Here, we report the use of partially reduced and functionalized graphene oxide as the sole surfactant to stabilize perfluorocarbon gas bubbles in the preparation of a dual-modality US and PA agent, with high contrast in both imaging modes and without the need for small-molecule or polymer additives. This approach offers an increase in loading of the PA agent without destabilization and increased thickness of the MB shell compared to traditional systems, in which the focus is on adding a PA agent to existing MB formulations.
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Affiliation(s)
- Al de Leon
- Department of Radiology, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Peiran Wei
- Department of Chemistry and Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Filip Bordera
- Department of Physics, Ryerson University, Toronto, Ontario M5B 2K3, Canada
| | - Dana Wegierak
- Department of Physics, Ryerson University, Toronto, Ontario M5B 2K3, Canada
| | - Madelyn McMillen
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - David Yan
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Christina Hemmingsen
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Michael C Kolios
- Department of Physics, Ryerson University, Toronto, Ontario M5B 2K3, Canada
| | - Emily B Pentzer
- Department of Chemistry and Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Agata A Exner
- Department of Radiology, Case Western Reserve University, Cleveland, Ohio 44106, United States
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23
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Graham M, Assis F, Allman D, Wiacek A, Gonzalez E, Gubbi M, Dong J, Hou H, Beck S, Chrispin J, Bell MAL. In Vivo Demonstration of Photoacoustic Image Guidance and Robotic Visual Servoing for Cardiac Catheter-Based Interventions. IEEE TRANSACTIONS ON MEDICAL IMAGING 2020; 39:1015-1029. [PMID: 31502964 DOI: 10.1109/tmi.2019.2939568] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Cardiac interventional procedures are often performed under fluoroscopic guidance, exposing both the patient and operators to ionizing radiation. To reduce this risk of radiation exposure, we are exploring the use of photoacoustic imaging paired with robotic visual servoing for cardiac catheter visualization and surgical guidance. A cardiac catheterization procedure was performed on two in vivo swine after inserting an optical fiber into the cardiac catheter to produce photoacoustic signals from the tip of the fiber-catheter pair. A combination of photoacoustic imaging and robotic visual servoing was employed to visualize and maintain constant sight of the catheter tip in order to guide the catheter through the femoral or jugular vein, toward the heart. Fluoroscopy provided initial ground truth estimates for 1D validation of the catheter tip positions, and these estimates were refined using a 3D electromagnetic-based cardiac mapping system as the ground truth. The 1D and 3D root mean square errors ranged 0.25-2.28 mm and 1.24-1.54 mm, respectively. The catheter tip was additionally visualized at three locations within the heart: (1) inside the right atrium, (2) in contact with the right ventricular outflow tract, and (3) inside the right ventricle. Lasered regions of cardiac tissue were resected for histopathological analysis, which revealed no laser-related tissue damage, despite the use of 2.98 mJ per pulse at the fiber tip (379.2 mJ/cm2 fluence). In addition, there was a 19 dB difference in photoacoustic signal contrast when visualizing the catheter tip pre- and post-endocardial tissue contact, which is promising for contact confirmation during cardiac interventional procedures (e.g., cardiac radiofrequency ablation). These results are additionally promising for the use of photoacoustic imaging to guide cardiac interventions by providing depth information and enhanced visualization of catheter tip locations within blood vessels and within the beating heart.
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24
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Helmi H, Siddiqui A, Yan Y, Basij M, Hernandez-Andrade E, Gelovani J, Hsu CD, Hassan SS, Mehrmohammadi M. The role of noninvasive diagnostic imaging in monitoring pregnancy and detecting patients at risk for preterm birth: a review of quantitative approaches. J Matern Fetal Neonatal Med 2020; 35:568-591. [PMID: 32089024 DOI: 10.1080/14767058.2020.1722099] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Preterm birth (PTB) is the leading cause of neonatal morbidity and mortality worldwide. The ability to predict patients at risk for preterm birth remains a major health challenge. The currently available clinical diagnostics such as cervical length and fetal fibronectin may detect only up to 30% of patients who eventually experience a spontaneous preterm birth. This paper reviews ongoing efforts to improve the ability to conduct a risk assessment for preterm birth. In particular, this work focuses on quantitative methods of imaging using ultrasound-based techniques, magnetic resonance imaging, and optical imaging modalities. While ultrasound imaging is the major modality for preterm birth risk assessment, a summary of efforts to adopt other imaging modalities is also discussed to identify the technical and diagnostic limits associated with adopting them in clinical settings. We conclude the review by proposing a new approach using combined photoacoustic, ultrasound, and elastography as a potential means to better assess cervical tissue remodeling, and thus improve the detection of patients at-risk of PTB.
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Affiliation(s)
- Hamid Helmi
- Department of Biomedical Engineering, Wayne State University, Detroit, MI, USA
| | - Adeel Siddiqui
- Department of Biomedical Engineering, Wayne State University, Detroit, MI, USA
| | - Yan Yan
- Department of Biomedical Engineering, Wayne State University, Detroit, MI, USA
| | - Maryam Basij
- Department of Biomedical Engineering, Wayne State University, Detroit, MI, USA
| | - Edgar Hernandez-Andrade
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, Maryland and Detroit, MI, USA
| | - Juri Gelovani
- Department of Biomedical Engineering, Wayne State University, Detroit, MI, USA.,Department of Obstetrics and Gynecology, Wayne State University, Detroit, MI, USA
| | - Chaur-Dong Hsu
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, Maryland and Detroit, MI, USA.,Department of Obstetrics and Gynecology, Wayne State University, Detroit, MI, USA
| | - Sonia S Hassan
- Department of Obstetrics and Gynecology, Wayne State University, Detroit, MI, USA.,Office of Women's Health, Wayne State University, Detroit, MI, USA
| | - Mohammad Mehrmohammadi
- Department of Biomedical Engineering, Wayne State University, Detroit, MI, USA.,Department of Obstetrics and Gynecology, Wayne State University, Detroit, MI, USA.,Department of Electrical and Computer Engineering, Wayne State University, Detroit, MI, USA
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25
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Abelha TF, Dreiss CA, Green MA, Dailey LA. Conjugated polymers as nanoparticle probes for fluorescence and photoacoustic imaging. J Mater Chem B 2020; 8:592-606. [DOI: 10.1039/c9tb02582k] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
In this review, the role of conjugated polymer nanoparticles (CPNs) in emerging bioimaging techniques is described.
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Affiliation(s)
- Thais Fedatto Abelha
- King's College London
- Institute of Pharmaceutical Science
- London
- UK
- School of Pharmacy
| | - Cécile A. Dreiss
- King's College London
- Institute of Pharmaceutical Science
- London
- UK
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26
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Changalvaie B, Han S, Moaseri E, Scaletti F, Truong L, Caplan R, Cao A, Bouchard R, Truskett TM, Sokolov KV, Johnston KP. Indocyanine Green J Aggregates in Polymersomes for Near-Infrared Photoacoustic Imaging. ACS APPLIED MATERIALS & INTERFACES 2019; 11:46437-46450. [PMID: 31804795 DOI: 10.1021/acsami.9b14519] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Clinical translation of photoacoustic imaging (PAI) has been limited by the lack of near-infrared (NIR) contrast agents with low toxicity required for regulatory approval. Herein, J aggregates of indocyanine green (ICG) with strong NIR absorbance were encapsulated at high loadings within small 77 nm polymersomes (nanocapsules) composed of poly(lactide-co-glycolide-b-poly(ethylene glycol)) (PLGA-b-PEG) bilayers, thus enabling PAI of of breast and ovarian cancer cells with high specificity and a sensitivity at the level of ∼100 total cells. All of the major components of the polymersomes are FDA approved and used in the clinic. During formation of polymersomes with a water-in-oil-in-water double emulsion process, loss of ICG from the ICG J aggregates was minimized by coating them with a layer of branched polyethylenimine and by providing excess "sacrificial" ICG to adsorb at the oil-water interfaces. The encapsulated J aggregates were protected against dissociation by the polymersome shell for 24 h in 100% fetal bovine serum, after which the polymersomes biodegraded and the J aggregates dissociated to ICG monomers.
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Affiliation(s)
| | - Sangheon Han
- Department of Imaging Physics , MD Anderson Cancer Center , Houston , Texas 77030 , United States
- Department of Bioengineering , Rice University , Houston , Texas 77005 , United States
| | | | | | | | | | | | - Richard Bouchard
- Department of Imaging Physics , MD Anderson Cancer Center , Houston , Texas 77030 , United States
- Graduate School of Biomedical Sciences , The University of Texas MD Anderson Cancer Center , Houston , Texas 77030 , United States
| | | | - Konstantin V Sokolov
- Department of Imaging Physics , MD Anderson Cancer Center , Houston , Texas 77030 , United States
- Department of Bioengineering , Rice University , Houston , Texas 77005 , United States
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27
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Wang W, Jing T, Xia X, Tang L, Huang Z, Liu F, Wang Z, Ran H, Li M, Xia J. Melanin-loaded biocompatible photosensitive nanoparticles for controlled drug release in combined photothermal-chemotherapy guided by photoacoustic/ultrasound dual-modality imaging. Biomater Sci 2019; 7:4060-4074. [PMID: 31475710 DOI: 10.1039/c9bm01052a] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Combined photothermal-chemotherapy guided by multimodal imaging is a promising strategy for cancer diagnosis and treatment. Multifunctional nanoparticles, such as those comprising organic and inorganic compounds, have been extensively investigated for combined photothermal-chemotherapy; however, their application is still limited by their potential long-term toxicity and lack of contrast properties. To solve these problems, in this study, a new type of multifunctional nanoparticle for combined photothermal-chemotherapy guided by dual-modality imaging was prepared with endogenous melanin by multistep emulsification to enhance tumor ablation. The nanoparticles were coated with poly(lactide-co-glycolic acid) (PLGA) and loaded with paclitaxel (PTX), encapsulated melanin and perfluoropentane (PFP). The materials in the nanoparticles were endogenous, ensuring high stability, biocompatibility, and biosafety. Nanoparticles irradiated with a laser, which induced their phase transformation into microbubbles, exhibited high photothermal conversion efficiency, thereby achieving photoacoustic (PA)/ultrasound (US) dual-modality imaging to determine tumor location, boundary, and size and to monitor drug distribution. Furthermore, optical droplet vaporization (ODV) of the nanoparticles could trigger the release of PTX; thus, these nanoparticles are a useful drug carrier. In vivo and in vitro experiments revealed that a strong synergistic antitumor effect was achieved by combining the photothermal properties of the nanoparticles with a chemotherapy drug. Importantly, the cavitation, thermoelastic expansion, and sonoporation caused by the phase transformation of the nanoparticles could directly damage the tumors. These processes also promoted the release, penetration and absorption of the drug, further enhancing the effect of combined photothermal-chemotherapy on tumor suppression. Therefore, the multifunctional nanoparticles prepared in this study provide a new strategy of using endogenous materials for controlled near-infrared (NIR)-responsive drug release and combined photothermal-chemotherapy guided by multimodal imaging.
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Affiliation(s)
- Wenyuan Wang
- Department of Ultrasound, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, PR China.
| | - Ting Jing
- Department of Radiology, Hospital (t.c.m) Affiliated to Southwest Medical University, Luzhou 646000, PR China
| | - Xiaorong Xia
- Department of Ultrasound, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, PR China.
| | - Linmei Tang
- Department of Ultrasound, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, PR China.
| | - Zhiqiang Huang
- Department of Ultrasound, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, PR China.
| | - Fengqiu Liu
- Institute of Ultrasound Imaging & Department of Ultrasound, The Second Affiliated Hospital of Chongqing Medical University; Chongqing Key Laboratory of Ultrasound Molecular Imaging, Chongqing 400010, PR China
| | - Zhigang Wang
- Institute of Ultrasound Imaging & Department of Ultrasound, The Second Affiliated Hospital of Chongqing Medical University; Chongqing Key Laboratory of Ultrasound Molecular Imaging, Chongqing 400010, PR China
| | - Haitao Ran
- Institute of Ultrasound Imaging & Department of Ultrasound, The Second Affiliated Hospital of Chongqing Medical University; Chongqing Key Laboratory of Ultrasound Molecular Imaging, Chongqing 400010, PR China
| | - Mingxing Li
- Department of Ultrasound, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, PR China.
| | - Jizhu Xia
- Department of Ultrasound, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, PR China.
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28
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Sun IC, Ahn CH, Kim K, Emelianov S. Photoacoustic imaging of cancer cells with glycol-chitosan-coated gold nanoparticles as contrast agents. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-5. [PMID: 31385483 PMCID: PMC6680094 DOI: 10.1117/1.jbo.24.12.121903] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 07/11/2019] [Indexed: 05/07/2023]
Abstract
Utility of glycol-chitosan-coated gold nanoparticles (GC-AuNPs) as a photoacoustic contrast agent for cancer cell imaging was demonstrated. Through the synergistic effect of glycol chitosan and gold nanoparticles, GC-AuNPs showed cellular uptake in breast cancer cells and resulted in strong photoacoustic signals in tissue-mimicking cell phantoms. The performance of GC-AuNPs as contrast agents was established with photoacoustic imaging and confirmed with dark-field microscopy. The cell phantoms displayed strong photoacoustic signals if cells were incubated more than 3 h with GC-AuNPs, compared with PEG-AuNPs that showed no photoacoustic signal increase. The enhanced photoacoustic signals originated from the plasmon coupling effect of GC-AuNPs after the cellular uptake in cancer cells. Importantly, photoacoustic imaging of cancer cells was achieved with GC-AuNPs—contrast agents that did not require antibodies or complex surface modification. The endocytosis of GC-AuNPs was also confirmed with dark-field microscopy. The results show that GC-AuNPs have potential as a photoacoustic contrast agent for cellular imaging including tumor tissue imaging.
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Affiliation(s)
- In-Cheol Sun
- Georgia Institute of Technology, School of Electrical and Computer Engineering Atlanta, Georgia, United States
- Georgia Institute of Technology and Emory University School of Medicine, Wallace H. Coulter Department of Biomedical Engineering, Atlanta, Georgia, United States
| | - Cheol-Hee Ahn
- Seoul National University, NanoBio Materials Laboratory, Department of Materials Science and Engineering, Seoul, Republic of Korea
| | - Kwangmeyung Kim
- Korea Institute of Science and Technology, Biomedical Research Institute, Seoul, Republic of Korea
| | - Stanislav Emelianov
- Georgia Institute of Technology, School of Electrical and Computer Engineering Atlanta, Georgia, United States
- Georgia Institute of Technology and Emory University School of Medicine, Wallace H. Coulter Department of Biomedical Engineering, Atlanta, Georgia, United States
- Address all correspondence to Stanislav Emelianov, E-mail:
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Kempski KM, Wiacek A, Graham M, González E, Goodson B, Allman D, Palmer J, Hou H, Beck S, He J, Bell MAL. In vivo photoacoustic imaging of major blood vessels in the pancreas and liver during surgery. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-12. [PMID: 31411010 PMCID: PMC7006046 DOI: 10.1117/1.jbo.24.12.121905] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 07/22/2019] [Indexed: 05/07/2023]
Abstract
Abdominal surgeries carry considerable risk of gastrointestinal and intra-abdominal hemorrhage, which could possibly cause patient death. Photoacoustic imaging is one solution to overcome this challenge by providing visualization of major blood vessels during surgery. We investigate the feasibility of in vivo blood vessel visualization for photoacoustic-guided liver and pancreas surgeries. In vivo photoacoustic imaging of major blood vessels in these two abdominal organs was successfully achieved after a laparotomy was performed on two swine. Three-dimensional photoacoustic imaging with a robot-controlled ultrasound (US) probe and color Doppler imaging were used to confirm vessel locations. Blood vessels in the in vivo liver were visualized with energies of 20 to 40 mJ, resulting in 10 to 15 dB vessel contrast. Similarly, an energy of 36 mJ was sufficient to visualize vessels in the pancreas with up to 17.3 dB contrast. We observed that photoacoustic signals were more focused when the light source encountered a major vessel in the liver. This observation can be used to distinguish major blood vessels in the image plane from the more diffuse signals associated with smaller blood vessels in the surrounding tissue. A postsurgery histopathological analysis was performed on resected pancreatic and liver tissues to explore possible laser-related damage. Results are generally promising for photoacoustic-guided abdominal surgery when the US probe is fixed and the light source is used to interrogate the surgical workspace. These findings are additionally applicable to other procedures that may benefit from photoacoustic-guided interventional imaging of the liver and pancreas (e.g., biopsy and guidance of radiofrequency ablation lesions in the liver).
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Affiliation(s)
- Kelley M. Kempski
- University of Delaware, Department of Biomedical Engineering, Newark, Delaware, United States
| | - Alycen Wiacek
- Johns Hopkins University, Department of Electrical and Computer Engineering, Baltimore, Maryland, United States
| | - Michelle Graham
- Johns Hopkins University, Department of Electrical and Computer Engineering, Baltimore, Maryland, United States
| | - Eduardo González
- Johns Hopkins University, Department of Biomedical Engineering, Baltimore, Maryland, United States
| | - Bria Goodson
- Delta State University, Department of Biology, Cleveland, Mississippi, United States
| | - Derek Allman
- Johns Hopkins University, Department of Electrical and Computer Engineering, Baltimore, Maryland, United States
| | - Jasmin Palmer
- Massachusetts Institute of Technology, Department of Mechanical Engineering, Cambridge, Massachusetts, United States
| | - Huayu Hou
- Johns Hopkins University, Department of Electrical and Computer Engineering, Baltimore, Maryland, United States
| | - Sarah Beck
- Johns Hopkins Medicine, Department of Molecular and Comparative Pathobiology, Baltimore, Maryland, United States
| | - Jin He
- Johns Hopkins Medicine, Department of Surgery, Baltimore, Maryland, United States
- Johns Hopkins Medicine, Department of Oncology, Baltimore, Maryland, United States
| | - Muyinatu A. Lediju Bell
- Johns Hopkins University, Department of Electrical and Computer Engineering, Baltimore, Maryland, United States
- Johns Hopkins University, Department of Biomedical Engineering, Baltimore, Maryland, United States
- Johns Hopkins University, Department of Computer Science, Baltimore, Maryland, United States
- Address all correspondence to Muyinatu A. Lediju Bell, E-mail:
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30
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Wood C, Harutyunyan K, Sampaio DR, Konopleva M, Bouchard R. Photoacoustic-based oxygen saturation assessment of murine femoral bone marrow in a preclinical model of leukemia. PHOTOACOUSTICS 2019; 14:31-36. [PMID: 31049286 PMCID: PMC6484208 DOI: 10.1016/j.pacs.2019.01.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 01/18/2019] [Accepted: 01/24/2019] [Indexed: 05/02/2023]
Abstract
A variety of hematological diseases manifest in the bone marrow (BM), broadly characterized as BM failure (BMF). BMF can be caused by acute lymphoblastic leukemia (ALL), which results in an expansion of hypoxic regions in the BM. Because of this hypoxic presentation, there is potential for improved characterization of BMF through in vivo assessment of oxygenation in the BM cavity. Photoacoustic (PA) imaging can provide local assessment of intravascular oxygen saturation (SO2), which has been shown to correlate with pimonidazole-assessed hypoxia. This study introduces an optimized PA imaging technique to assess SO2 within the femoral BM cavity through disease progression in a murine model of ALL. Results show a statistically significant difference with temporal changes in SO2 (from baseline) between control and diseased cohorts, demonstrating the potential of PA imaging for noninvasive, label-free monitoring of BMF diseases.
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Affiliation(s)
- Cayla Wood
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
- The University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX 77030, USA
| | - Karine Harutyunyan
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Diego R.T. Sampaio
- Department of Physics, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Marina Konopleva
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
- The University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX 77030, USA
| | - Richard Bouchard
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
- The University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX 77030, USA
- Corresponding author at: Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.
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31
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Pei Y, Chen L, Huang Y, Wang J, Feng J, Xu M, Chen Y, Song Q, Jiang G, Gu X, Zhang Q, Gao X, Chen J. Sequential Targeting TGF-β Signaling and KRAS Mutation Increases Therapeutic Efficacy in Pancreatic Cancer. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1900631. [PMID: 31033217 DOI: 10.1002/smll.201900631] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 04/15/2019] [Indexed: 06/09/2023]
Abstract
Pancreatic cancer is a highly aggressive malignancy that strongly resists extant treatments. The failure of existing therapies is majorly attributed to the tough tumor microenvironment (TME) limiting drug access and the undruggable targets of tumor cells. The formation of suppressive TME is regulated by transforming growth factor beta (TGF-β) signaling, while the poor response and short survival of almost 90% of pancreatic cancer patients results from the oncogenic KRAS mutation. Hence, simultaneously targeting both the TGF-β and KRAS pathways might dismantle the obstacles of pancreatic cancer therapy. Here, a novel sequential-targeting strategy is developed, in which antifibrotic fraxinellone-loaded CGKRK-modified nanoparticles (Frax-NP-CGKRK) are constructed to regulate TGF-β signaling and siRNA-loaded lipid-coated calcium phosphate (LCP) biomimetic nanoparticles (siKras-LCP-ApoE3) are applied to interfere with the oncogenic KRAS. Frax-NP-CGKRK successfully targets the tumor sites through the recognition of overexpressed heparan sulfate proteoglycan, reverses the activated cancer-associated fibroblasts (CAFs), attenuates the dense stroma barrier, and enhances tumor blood perfusion. Afterward, siKras-LCP-ApoE3 is efficiently internalized by the tumor cells through macropinocytosis and specifically silencing KRAS mutation. Compared with gemcitabine, this sequential-targeting strategy significantly elongates the lifespans of pancreatic tumor-bearing animals, hence providing a promising approach for pancreatic cancer therapy.
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Affiliation(s)
- Yuanyuan Pei
- Key Laboratory of Smart Drug Delivery, Ministry of Education, School of Pharmacy, Fudan University, Lane 826, Zhangheng Road, Shanghai, 201203, P. R. China
| | - Liang Chen
- Key Laboratory of Smart Drug Delivery, Ministry of Education, School of Pharmacy, Fudan University, Lane 826, Zhangheng Road, Shanghai, 201203, P. R. China
| | - Yukun Huang
- Key Laboratory of Smart Drug Delivery, Ministry of Education, School of Pharmacy, Fudan University, Lane 826, Zhangheng Road, Shanghai, 201203, P. R. China
| | - Jiahao Wang
- Key Laboratory of Smart Drug Delivery, Ministry of Education, School of Pharmacy, Fudan University, Lane 826, Zhangheng Road, Shanghai, 201203, P. R. China
| | - Jingxian Feng
- Key Laboratory of Smart Drug Delivery, Ministry of Education, School of Pharmacy, Fudan University, Lane 826, Zhangheng Road, Shanghai, 201203, P. R. China
| | - Minjun Xu
- Key Laboratory of Smart Drug Delivery, Ministry of Education, School of Pharmacy, Fudan University, Lane 826, Zhangheng Road, Shanghai, 201203, P. R. China
| | - Yu Chen
- Key Laboratory of Smart Drug Delivery, Ministry of Education, School of Pharmacy, Fudan University, Lane 826, Zhangheng Road, Shanghai, 201203, P. R. China
| | - Qingxiang Song
- Department of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, Shanghai, 200025, P. R. China
| | - Gan Jiang
- Department of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, Shanghai, 200025, P. R. China
| | - Xiao Gu
- Department of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, Shanghai, 200025, P. R. China
| | - Qian Zhang
- Department of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, Shanghai, 200025, P. R. China
| | - Xiaoling Gao
- Department of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, Shanghai, 200025, P. R. China
| | - Jun Chen
- Key Laboratory of Smart Drug Delivery, Ministry of Education, School of Pharmacy, Fudan University, Lane 826, Zhangheng Road, Shanghai, 201203, P. R. China
- Department of Pharmacy, Pudong Hospital, Fudan University, 2800 Gongwei Road, Shanghai, 201399, P. R. China
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32
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Filippi M, Garello F, Pasquino C, Arena F, Giustetto P, Antico F, Terreno E. Indocyanine green labeling for optical and photoacoustic imaging of mesenchymal stem cells after in vivo transplantation. JOURNAL OF BIOPHOTONICS 2019; 12:e201800035. [PMID: 30471202 DOI: 10.1002/jbio.201800035] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 11/19/2018] [Accepted: 11/20/2018] [Indexed: 06/09/2023]
Abstract
The transplantation of mesenchymal stem cells (MSCs) holds great promise for the treatment of a plethora of human diseases, but new noninvasive procedures are needed to monitor the cell fate in vivo. Already largely used in medical diagnostics, the fluorescent dye indocyanine green (ICG) is an established dye to track limited numbers of cells by optical imaging (OI), but it can also be visualized by photoacoustic imaging (PAI), which provides a higher spatial resolution than pure near infrared fluorescence imaging (NIRF). Because of its successful use in clinical and preclinical examinations, we chose ICG as PAI cell labeling agent. Optimal incubation conditions were defined for an efficient and clinically translatable MSC labeling protocol, such that no cytotoxicity or alterations of the phenotypic profile were observed, and a consistent intracellular uptake of the molecule was achieved. Suspensions of ICG-labeled cells were both optically and optoacoustically detected in vitro, revealing a certain variability in the photoacoustic spectra acquired by varying the excitation wavelength from 680 to 970 nm. Intramuscular engraftments of ICG-labeled MSCs were clearly visualized by both PAI and NIRF over few days after transplantation in the hindlimb of healthy mice, suggesting that the proposed technique retains a considerable potential in the field of transplantation-focused research and therapy. Stem cells were labeled with the Food and Drug Administration (FDA)-approved fluorescent dye ICG, and detected by both PAI and OI, enabling to monitor the cell fate safely, in dual modality, and with good sensitivity and improved spatial resolution.
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Affiliation(s)
- Miriam Filippi
- Molecular and Preclinical Imaging Centers, Department of Molecular Biotechnology and Health Sciences, University of Turin, Torino, Italy
| | - Francesca Garello
- Molecular and Preclinical Imaging Centers, Department of Molecular Biotechnology and Health Sciences, University of Turin, Torino, Italy
| | - Chiara Pasquino
- Department of Molecular Biotechnology and Health Sciences, University of Turin, Torino, Italy
| | - Francesca Arena
- Molecular and Preclinical Imaging Centers, Department of Molecular Biotechnology and Health Sciences, University of Turin, Torino, Italy
| | - Pierangela Giustetto
- Molecular and Preclinical Imaging Centers, Department of Molecular Biotechnology and Health Sciences, University of Turin, Torino, Italy
| | - Federica Antico
- Department of Molecular Biotechnology and Health Sciences, University of Turin, Torino, Italy
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Sinnamon AJ, Neuwirth MG, Song Y, Schultz SM, Liu S, Xu X, Sehgal CM, Karakousis GC. Multispectral photoacoustic imaging for the detection of subclinical melanoma. J Surg Oncol 2019; 119:1070-1076. [PMID: 30874312 DOI: 10.1002/jso.25447] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 01/24/2019] [Accepted: 02/26/2019] [Indexed: 01/23/2023]
Abstract
BACKGROUND Photoacoustic imaging (PAI) is a noninvasive technique for melanin detection within melanoma metastases. While ex vivo and early studies suggest promising clinical application, there are no standardized parameters for defining presence of melanoma metastases. METHODS Following flank/hindlimb melanoma induction in BRaf-PTEN transgenic mice, bilateral inguinal lymph nodes (LN) were imaged in vivo at 4 to 8 weeks using PAI. Fourteen diagnostic parameters for in vivo detection of LN metastases were compared using the receiver operating characteristic and area-under-the-curve (AUC). Limits of detectability were assessed in ex vivo and in vitro phantom studies. RESULTS Forty-nine LNs were imaged in 25 mice. Among metastatic LNs, tumor size ranged from scattered cells to 2.8 mm. The strongest predictor of LN metastasis was the ratio of peak 10% PA melanin signal in the LN compared with adjacent soft tissue (median 4.22 for positive LNs vs 1.07 for negative LNs, P < 0.0001). The AUC was 0.95 (95% CI, 0.90-1.00). In phantom studies, B16 tumor cells were detectable at a concentration of 10 to 25 cells/μL and at a tissue depth of 2.5-3 cm. CONCLUSIONS We identified a simple, objective diagnostic parameter for identifying melanoma LN metastases in vivo. These findings may help inform the design of future clinical trials.
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Affiliation(s)
- Andrew J Sinnamon
- Department of Surgery, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Madalyn G Neuwirth
- Department of Surgery, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Yun Song
- Department of Surgery, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Susan M Schultz
- Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Shujing Liu
- Department of Pathology, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Xiaowei Xu
- Department of Pathology, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Chandra M Sehgal
- Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania
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Lediju Bell MA, Shubert J. Photoacoustic-based visual servoing of a needle tip. Sci Rep 2018; 8:15519. [PMID: 30341371 PMCID: PMC6195562 DOI: 10.1038/s41598-018-33931-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 10/08/2018] [Indexed: 12/15/2022] Open
Abstract
In intraoperative settings, the presence of acoustic clutter and reflection artifacts from metallic surgical tools often reduces the effectiveness of ultrasound imaging and complicates the localization of surgical tool tips. We propose an alternative approach for tool tracking and navigation in these challenging acoustic environments by augmenting ultrasound systems with a light source (to perform photoacoustic imaging) and a robot (to autonomously and robustly follow a surgical tool regardless of the tissue medium). The robotically controlled ultrasound probe continuously visualizes the location of the tool tip by segmenting and tracking photoacoustic signals generated from an optical fiber inside the tool. System validation in the presence of fat, muscle, brain, skull, and liver tissue with and without the presence of an additional clutter layer resulted in mean signal tracking errors <2 mm, mean probe centering errors <1 mm, and successful recovery from ultrasound perturbations, representing either patient motion or switching from photoacoustic images to ultrasound images to search for a target of interest. A detailed analysis of channel SNR in controlled experiments with and without significant acoustic clutter revealed that the detection of a needle tip is possible with photoacoustic imaging, particularly in cases where ultrasound imaging traditionally fails. Results show promise for guiding surgeries and procedures in acoustically challenging environments with this novel robotic and photoacoustic system combination.
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Affiliation(s)
- Muyinatu A Lediju Bell
- Johns Hopkins University, Department of Electrical and Computer Engineering, Baltimore, MD, 21218, USA. .,Johns Hopkins University, Department of Biomedical Engineering, Baltimore, MD, 21218, USA. .,Johns Hopkins University, Department of Computer Science, Baltimore, MD, 21218, USA.
| | - Joshua Shubert
- Johns Hopkins University, Department of Electrical and Computer Engineering, Baltimore, MD, 21218, USA
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35
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The Progress in Photoacoustic and Laser Ultrasonic Tomographic Imaging for Biomedicine and Industry: A Review. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8101931] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The current paper reviews a set of principles and applications of photoacoustic and laser ultrasonic imaging, developed in the Laser Optoacoustic Laboratories of ILIT RAS, NUST MISiS, and ILC MSU. These applications include combined photoacoustic and laser ultrasonic imaging for biological objects, and tomographic laser ultrasonic imaging of solids. Principles, algorithms, resolution of the developed methods, and related problems are discussed. The review is written in context of the current state-of-art of photoacoustic and laser ultrasonic imaging.
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Shubert J, Lediju Bell MA. Photoacoustic imaging of a human vertebra: implications for guiding spinal fusion surgeries. Phys Med Biol 2018; 63:144001. [PMID: 29923832 DOI: 10.1088/1361-6560/aacdd3] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
It is well known that there are structural differences between cortical and cancellous bone. However, spinal surgeons currently have no reliable method to non-invasively determine these differences in real-time when choosing the optimal starting point and trajectory to insert pedicle screws and avoid surgical complications associated with breached or weakened bone. This paper explores 3D photoacoustic imaging of a human vertebra to noninvasively differentiate cortical from cancellous bone for this surgical task. We observed that signals from the cortical bone tend to appear as compact, high-amplitude signals, while signals from the cancellous bone have lower amplitudes and are more diffuse. In addition, we discovered that the location of the light source for photoacoustic imaging is a critical parameter that can be adjusted to non-invasively determine the optimal entry point into the pedicle. Once inside the pedicle, statistically significant differences in the contrast and SNR of signals originating from the cancellous core of the pedicle (when compared to signals originating from the surrounding cortical bone) were obtained with laser energies of 0.23-2.08 mJ (p < 0.05). Similar quantitative differences were observed with an energy of 1.57 mJ at distances ⩾6 mm from the cortical bone of the pedicle. These quantifiable differences between cortical and cancellous bone (when imaging with an ultrasound probe in direct contact with each bone type) can potentially be used to ensure an optimal trajectory during surgery. Our results are promising for the introduction and development of photoacoustic imaging systems to overcome a wide range of longstanding challenges with spinal surgeries, including challenges with the occurrence of bone breaches due to misplaced pedicle screws.
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Affiliation(s)
- Joshua Shubert
- Department of Electrical and Computer Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, United States of America
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37
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Allman D, Reiter A, Bell MAL. Photoacoustic Source Detection and Reflection Artifact Removal Enabled by Deep Learning. IEEE TRANSACTIONS ON MEDICAL IMAGING 2018; 37:1464-1477. [PMID: 29870374 PMCID: PMC6075868 DOI: 10.1109/tmi.2018.2829662] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Interventional applications of photoacoustic imaging typically require visualization of point-like targets, such as the small, circular, cross-sectional tips of needles, catheters, or brachytherapy seeds. When these point-like targets are imaged in the presence of highly echogenic structures, the resulting photoacoustic wave creates a reflection artifact that may appear as a true signal. We propose to use deep learning techniques to identify these types of noise artifacts for removal in experimental photoacoustic data. To achieve this goal, a convolutional neural network (CNN) was first trained to locate and classify sources and artifacts in pre-beamformed data simulated with -Wave. Simulations initially contained one source and one artifact with various medium sound speeds and 2-D target locations. Based on 3,468 test images, we achieved a 100% success rate in classifying both sources and artifacts. After adding noise to assess potential performance in more realistic imaging environments, we achieved at least 98% success rates for channel signal-to-noise ratios (SNRs) of -9dB or greater, with a severe decrease in performance below -21dB channel SNR. We then explored training with multiple sources and two types of acoustic receivers and achieved similar success with detecting point sources. Networks trained with simulated data were then transferred to experimental waterbath and phantom data with 100% and 96.67% source classification accuracy, respectively (particularly when networks were tested at depths that were included during training). The corresponding mean ± one standard deviation of the point source location error was 0.40 ± 0.22 mm and 0.38 ± 0.25 mm for waterbath and phantom experimental data, respectively, which provides some indication of the resolution limits of our new CNN-based imaging system. We finally show that the CNN-based information can be displayed in a novel artifact-free image format, enabling us to effectively remove reflection artifacts from photoacoustic images, which is not possible with traditional geometry-based beamforming.
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Brannen A, Eggert M, Nahrendorf M, Arnold R, Panizzi P. Correlation of 360-degree Surface Mapping In Vivo Bioluminescence with Multi-Spectral Optoacoustic Tomography in Human Xenograft Tumor Models. Sci Rep 2018; 8:3321. [PMID: 29463820 PMCID: PMC5820276 DOI: 10.1038/s41598-018-21668-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 02/08/2018] [Indexed: 12/18/2022] Open
Abstract
Pre-clinical monitoring of tumor growth and identification of distal metastasis requires a balance between accuracy and expediency. Bioluminescence imaging (BLI) is often used to track tumor growth but is primarily limited to planar 2-dimensional (2D) imaging. Consistent subject placement within a standard top-mounted, single-detector small animal imager is vital to reducing variability in repeated same-animal measures over time. Here, we describe a method for tracking tumor development using a multi-angle BLI and photo-acoustic workflow. We correlate serial caliper measurements and 2D BLI to 360° BLI and photo-acoustic datasets for the same animals. Full 360° BLI showed improved correlations with both volumes obtained from caliper measurements and photo-acoustic segmentation, as compared to planar BLI. We also determined segmented tumor volumes from photo-acoustic datasets more accurately reflects true excised tumors’ volumes compared to caliper measurements. Our results demonstrate the distinct advantages of both 360° surface mapping by BLI and photo-acoustic methodologies for non-invasive tracking of tumor growth in pre-clinical academic settings. Furthermore, our design is fully implementable in all top-mounted, single-detector imagers, thereby providing the opportunity to shift the paradigm away from planar BLI into rapid BLI tomography applications.
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Affiliation(s)
- Andrew Brannen
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, 247 Pharmacy Research Building, 720 South Donahue Dr., Auburn, AL, 36849, USA.,Auburn Laboratory for Imaging Animal Systems, College of Veterinary Medicine, Auburn University, 403 Green Annex, Auburn, AL, 36849, USA
| | - Matthew Eggert
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, 247 Pharmacy Research Building, 720 South Donahue Dr., Auburn, AL, 36849, USA
| | - Matthias Nahrendorf
- Center for Systems Biology, Massachusetts General Hospital & Harvard Medical School, 185 Cambridge Street, Boston, MA, 02115, USA
| | - Robert Arnold
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, 247 Pharmacy Research Building, 720 South Donahue Dr., Auburn, AL, 36849, USA
| | - Peter Panizzi
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, 247 Pharmacy Research Building, 720 South Donahue Dr., Auburn, AL, 36849, USA. .,Auburn Laboratory for Imaging Animal Systems, College of Veterinary Medicine, Auburn University, 403 Green Annex, Auburn, AL, 36849, USA.
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Allard M, Shubert J, Bell MAL. Feasibility of photoacoustic-guided teleoperated hysterectomies. J Med Imaging (Bellingham) 2018; 5:021213. [PMID: 29487885 PMCID: PMC5803551 DOI: 10.1117/1.jmi.5.2.021213] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 01/11/2018] [Indexed: 02/01/2023] Open
Abstract
Hysterectomies (i.e., surgical removal of the uterus) are the prevailing solution to treat medical conditions such as uterine cancer, endometriosis, and uterine prolapse. One complication of hysterectomies is accidental injury to the ureters located within millimeters of the uterine arteries that are severed and cauterized to hinder blood flow and enable full uterus removal. This work explores the feasibility of using photoacoustic imaging to visualize the uterine arteries (and potentially the ureter) when this imaging method is uniquely combined with a da Vinci® surgical robot that enables teleoperated hysterectomies. We developed a specialized light delivery system to surround a da Vinci® curved scissor tool, and an ultrasound probe was placed externally, representing a transvaginal approach, to receive the acoustic signals. Photoacoustic images were acquired while sweeping the tool across our custom 3-D uterine vessel model covered in ex vivo bovine tissue that was placed between the 3-D model and the fiber, as well as between the ultrasound probe and the 3-D model. Four tool orientations were explored, and the robot kinematics were used to provide tool position and orientation information simultaneously with each photoacoustic image acquisition. The optimal tool orientation produced images with contrast >10 dB and background signal-to-noise ratios (SNRs) >1.7, indicating minimal acoustic clutter from the tool tip. We achieved similar contrast and SNR measurements with four unique wrist orientations explored with the scissor tool in open and closed configurations. Results indicate that photoacoustic imaging is a promising approach to enable visualization of the uterine arteries to guide hysterectomies (and other gynecological surgeries). These results are additionally applicable to other da Vinci® surgeries and other surgical instruments with similar tip geometry.
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Affiliation(s)
- Margaret Allard
- Smith College, Department of Physics, Northampton, Massachusetts, United States
| | - Joshua Shubert
- Johns Hopkins University, Department of Electrical and Computer Engineering, Baltimore, Maryland, United States
| | - Muyinatu A Lediju Bell
- Johns Hopkins University, Department of Electrical and Computer Engineering, Baltimore, Maryland, United States.,Johns Hopkins University, Department of Biomedical Engineering, Baltimore, Maryland, United States
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Yamaleyeva LM, Brosnihan KB, Smith LM, Sun Y. Preclinical Ultrasound-Guided Photoacoustic Imaging of the Placenta in Normal and Pathologic Pregnancy. Mol Imaging 2018; 17:1536012118802721. [PMID: 30348036 PMCID: PMC6201183 DOI: 10.1177/1536012118802721] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 08/29/2018] [Accepted: 08/30/2018] [Indexed: 11/15/2022] Open
Abstract
Placental oxygenation varies throughout pregnancy. The detection of early changes in placental oxygenation as pregnancy progresses is important for early identification of preeclampsia or other complications. This invited commentary discusses a recent preclinical study on the application of 3-dimensional photoacoustic imaging (PAI) for assessment of regional variations in placental oxygenation and longitudinal analysis of differences in placental oxygenation throughout normal pregnancy and pregnancy associated with hypertension or placental insufficiency in mice. Three-dimensional PAI more accurately reflects oxygen saturation, hemoglobin concentrations, and changes in oxygen saturation in whole placenta compared to 2-dimensional imaging. These studies suggest that PAI is a sensitive tool to detect different levels of oxygen saturation in the placental and fetal vasculature in pathologic and normal pregnancy in mice.
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Affiliation(s)
- Liliya M. Yamaleyeva
- Department of Surgery, Hypertension and Vascular Research, Wake Forest
School of Medicine, Winston-Salem, NC, USA
| | - K. Bridget Brosnihan
- Department of Surgery, Hypertension and Vascular Research, Wake Forest
School of Medicine, Winston-Salem, NC, USA
| | - Lane M. Smith
- Department of Emergency Medicine, Wake Forest School of Medicine,
Winston-Salem, NC, USA
| | - Yao Sun
- Department of Radiology, Wake Forest School of Medicine, Winston-Salem, NC,
USA
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Gandhi N, Allard M, Kim S, Kazanzides P, Lediju Bell MA. Photoacoustic-based approach to surgical guidance performed with and without a da Vinci robot. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:121606. [PMCID: PMC5571435 DOI: 10.1117/1.jbo.22.12.121606] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 07/28/2017] [Indexed: 05/19/2023]
Abstract
Death and paralysis are significant risks of modern surgeries, caused by injury to blood vessels and nerves hidden by bone and other tissue. We propose an approach to surgical guidance that relies on photoacoustic (PA) imaging to determine the separation between these critical anatomical features and to assess the extent of safety zones during surgical procedures. Images were acquired as an optical fiber was swept across vessel-mimicking targets, in the absence and presence of teleoperation with a research da Vinci Surgical System. Vessel separation distances were measured directly from PA images. Vessel positions were additionally recorded based on the fiber position (calculated from the da Vinci robot kinematics) that corresponded to an observed PA signal, and these recordings were used to indirectly measure vessel separation distances. Amplitude- and coherence-based beamforming were used to estimate vessel separations, resulting in 0.52- to 0.56-mm mean absolute errors, 0.66- to 0.71-mm root-mean-square errors, and 65% to 68% more accuracy compared to fiber position measurements obtained through the da Vinci robot kinematics. Similar accuracy was achieved in the presence of up to 4.5-mm-thick ex vivo tissue. Results indicate that PA image-based measurements of the separation among anatomical landmarks could be a viable method for real-time path planning in multiple interventional PA applications.
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Affiliation(s)
- Neeraj Gandhi
- University of Virginia, Department of Electrical and Computer Engineering, Charlottesville, Virginia, United States
| | - Margaret Allard
- Smith College, Department of Physics, Northampton, Massachusetts, United States
| | - Sungmin Kim
- Johns Hopkins University, Department of Computer Science, Maryland, United States
| | - Peter Kazanzides
- Johns Hopkins University, Department of Computer Science, Maryland, United States
| | - Muyinatu A. Lediju Bell
- Johns Hopkins University, Department of Electrical and Computer Engineering, Baltimore, Maryland, United States
- Johns Hopkins University, Department of Biomedical Engineering, Baltimore, Maryland, United States
- Address all correspondence to: Muyinatu A. Lediju Bell, E-mail:
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Ito K, Yoshida K, Maruyama H, Mamou J, Yamaguchi T. Acoustic Impedance Analysis with High-Frequency Ultrasound for Identification of Fatty Acid Species in the Liver. ULTRASOUND IN MEDICINE & BIOLOGY 2017; 43:700-711. [PMID: 28040242 DOI: 10.1016/j.ultrasmedbio.2016.11.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 10/21/2016] [Accepted: 11/14/2016] [Indexed: 06/06/2023]
Abstract
Acoustic properties of free fatty acids present in the liver were studied as a possible basis for non-invasive ultrasonic diagnosis of non-alcoholic steatohepatitis. Acoustic impedance was measured for the following types of tissue samples: Four pathologic types of mouse liver, five kinds of FFAs in solvent and five kinds of FFAs in cultured Huh-7 cells. A transducer with an 80-MHz center frequency was incorporated into a scanning acoustic microscopy system. Acoustic impedance was calculated from the amplitude of the signal reflected from the specimen surface. The Kruskal-Wallis test revealed statistically significant differences (p < 0.01) in acoustic impedance not only among pathologic types, but also among the FFAs in solvent and in cultured Huh-7 cells. These results suggest that each of the FFAs, especially palmitate, oleate and palmitoleate acid, can be distinguished from each other, regardless of whether they were in solution or absorbed by cells.
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Affiliation(s)
- Kazuyo Ito
- Graduate School of Engineering, Chiba University, Inage, Chiba, Chiba, Japan.
| | - Kenji Yoshida
- Center for Frontier Medical Engineering, Chiba University, Inage, Chiba, Chiba, Japan
| | - Hitoshi Maruyama
- Graduate School of Medicine, Chiba University, Chuou, Chiba, Chiba, Japan
| | - Jonathan Mamou
- F. L. Lizzi Center for Biomedical Engineering, Riverside Research Institute, New York, New York, USA
| | - Tadashi Yamaguchi
- Center for Frontier Medical Engineering, Chiba University, Inage, Chiba, Chiba, Japan
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Subochev P, Orlova A, Mikhailova I, Shilyagina N, Turchin I. Simultaneous in vivo imaging of diffuse optical reflectance, optoacoustic pressure and ultrasonic scattering. BIOMEDICAL OPTICS EXPRESS 2016; 7:3951-3957. [PMID: 27867706 PMCID: PMC5102546 DOI: 10.1364/boe.7.003951] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 09/03/2016] [Accepted: 09/06/2016] [Indexed: 05/09/2023]
Abstract
We present reflection-mode bioimaging system providing complementary optical, photoacsoutic and acoustic measurements by acoustic detector after each laser pulse. While the photons absorbed within the sample provide optoacoustic (OA) signals, the photons absorbed by the external electrode of a detector provide the measurable diffuse reflectance (DR) from the sample and the probing ultrasonic (US) pulse. To demonstrate the in vivo capabilities of the system we present the results of complementary DR/OA/US imaging of a mouse tumor, head of a newborn rat, and the back of a newborn rat with 3.5mm/50μm/35μm lateral resolution. Trimodal approach allows visualization of mechanical structures in healthy and pathological tissues along with peculiarities of blood supply. The system may be used for diagnostics of diseases accompanied by the defects of vascularization as well as for assessing the mechanisms of vascular changes when monitoring response to therapy.
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Affiliation(s)
- Pavel Subochev
- Institute of Applied Physics RAS, 46 Ulyanov Street, Nizhniy Novgorod, Russia
| | - Anna Orlova
- Institute of Applied Physics RAS, 46 Ulyanov Street, Nizhniy Novgorod, Russia
| | - Irina Mikhailova
- Institute of Applied Physics RAS, 46 Ulyanov Street, Nizhniy Novgorod, Russia
| | - Natalia Shilyagina
- Lobachevsky State University of Nizhny Novgorod, 19 Gagarin Avenue, Nizhniy Novgorod, Russia
| | - Ilya Turchin
- Institute of Applied Physics RAS, 46 Ulyanov Street, Nizhniy Novgorod, Russia
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Molecular Imaging of Vulnerable Atherosclerotic Plaques in Animal Models. Int J Mol Sci 2016; 17:ijms17091511. [PMID: 27618031 PMCID: PMC5037788 DOI: 10.3390/ijms17091511] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 08/24/2016] [Accepted: 08/31/2016] [Indexed: 12/13/2022] Open
Abstract
Atherosclerosis is characterized by intimal plaques of the arterial vessels that develop slowly and, in some cases, may undergo spontaneous rupture with subsequent heart attack or stroke. Currently, noninvasive diagnostic tools are inadequate to screen atherosclerotic lesions at high risk of acute complications. Therefore, the attention of the scientific community has been focused on the use of molecular imaging for identifying vulnerable plaques. Genetically engineered murine models such as ApoE−/− and ApoE−/−Fbn1C1039G+/− mice have been shown to be useful for testing new probes targeting biomarkers of relevant molecular processes for the characterization of vulnerable plaques, such as vascular endothelial growth factor receptor (VEGFR)-1, VEGFR-2, intercellular adhesion molecule (ICAM)-1, P-selectin, and integrins, and for the potential development of translational tools to identify high-risk patients who could benefit from early therapeutic interventions. This review summarizes the main animal models of vulnerable plaques, with an emphasis on genetically altered mice, and the state-of-the-art preclinical molecular imaging strategies.
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Subochev P. Cost-effective imaging of optoacoustic pressure, ultrasonic scattering, and optical diffuse reflectance with improved resolution and speed. OPTICS LETTERS 2016; 41:1006-9. [PMID: 26974102 DOI: 10.1364/ol.41.001006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The idea of a method of cost-effective upgrades from an acoustic resolution photoacoustic microscope to a triple-modality imaging system is validated using phantoms. The newly developed experimental setup is based on a diode pumped solid state laser coupled to a fiber bundle with a spherically focused polyvinylidene fluoride detector integrated into the center of a ring shaped optical illuminator. Each laser pulse illuminating the sample performs two functions. While the photons absorbed by the sample provide a measurable optoacoustic (OA) signal, the photons absorbed by the detector provide the measurable diffuse reflectometry (DR) signal from the sample and the probing ultrasonic (US) pulse. At a 3 mm imaging depth, the axial resolution of the OA/US modalities is 38 μm/26 μm, while the lateral resolution of the DR/OA/US modalities is 3.5 mm/50 μm/35 μm. The maximum acquisition rate of the trimodal DR/OA/US A-scans is 2 kHz.
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Handheld Probe-Based Dual Mode Ultrasound/Photoacoustics for Biomedical Imaging. FRONTIERS IN BIOPHOTONICS FOR TRANSLATIONAL MEDICINE 2016. [DOI: 10.1007/978-981-287-627-0_7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Merčep E, Burton NC, Claussen J, Razansky D. Whole-body live mouse imaging by hybrid reflection-mode ultrasound and optoacoustic tomography. OPTICS LETTERS 2015; 40:4643-4646. [PMID: 26469584 DOI: 10.1364/ol.40.004643] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We present a hybrid preclinical imaging scanner that optimally supports image acquisition in both reflection-mode ultrasonography and optoacoustic (OA) tomography modes. The system comprises a quasi-full-ring tomographic geometry capable of the simultaneous dual-mode imaging through entire cross sections of mice with in-plane spatial resolution in the range of 150 and 350 μm in the respective OA and ultrasound (US) imaging modes with an imaging speed of up to 10 two-dimensional frames per second. Three-dimensional whole-body data is subsequently rendered by rapid scanning of the imaged plane. The system further incorporates rapid laser wavelength tuning for real-time acquisition of multispectral OA data, which enables studies of longitudinal dynamics as well as fast kinetics and biodistribution of contrast agents. In vivo imaging performance is demonstrated by label-free hybrid anatomical scans through living mice, as well as real-time visualization of optical contrast agent perfusion. By setting new standards for whole-body tomographic imaging performance in both the OA and pulse-echo US modes, the developed hybrid imaging approach is expected to benefit numerous applications where the availability of high-quality structural information provided by the tomographic reflection-mode US can ease interpretation of the functional and molecular imaging results attained by the OA modality.
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Gray JP, Dana N, Dextraze KL, Maier F, Emelianov S, Bouchard RR. Multi-Wavelength Photoacoustic Visualization of High Intensity Focused Ultrasound Lesions. ULTRASONIC IMAGING 2015; 38:96-112. [PMID: 26149314 DOI: 10.1177/0161734615593747] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
High intensity focused ultrasound (HIFU) thermal therapies are limited by deficiencies in existing image-guidance techniques. Previous studies using single-wavelength photoacoustic (PA) imaging have demonstrated that HIFU lesions generate contrast with respect to native tissues but have not sufficiently assessed lesion extent. The purpose of this study is to demonstrate feasibility of characterization of in vitro HIFU ablation lesion dimensions using 3D multi-wavelength PA imaging. Fresh porcine cardiac and liver tissue samples were embedded in agar phantoms and ablated using a 2.5 MHz small-animal HIFU system. Both 2D and 3D multi-wavelength photoacoustic-ultrasonic (PAUS) scans were performed in the near-infrared (NIR) range to characterize the change in the absorption spectrum of tissues following ablation and were compared to stained gross pathology to assess treatment margins and lesion extent. Comprehensive 2D multi-wavelength PA imaging yielded a spectrum in ablated tissue that did not display the characteristic local maximum in the optical absorption spectrum of deoxy-hemoglobin (Hb) near 760 nm. Two-dimensional tissue characterization map (TCM) images reconstructed from 3D TCM volumes reliably characterized lesion area and showed >70% area agreement with stained gross pathology. In addition, tissue samples were heated via water bath and concurrently interrogated with 2D PAUS imaging. PA signal exhibited an initial amplitude increase across all wavelengths, corresponding to an initial temperature increase, before then exhibiting a spectral change. This study suggests that multi-wavelength PA imaging has potential to obtain accurate characterization of HIFU lesion extent and may be better suited to guide HIFU ablation therapies during clinical treatments than single-wavelength methods.
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Affiliation(s)
- J P Gray
- MD Anderson Cancer Center, Houston, TX, USA
| | - N Dana
- University of Texas at Austin, Austin, TX, USA
| | | | - F Maier
- MD Anderson Cancer Center, Houston, TX, USA
| | - S Emelianov
- University of Texas at Austin, Austin, TX, USA
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Gateau J, Gesnik M, Chassot JM, Bossy E. Single-side access, isotropic resolution, and multispectral three-dimensional photoacoustic imaging with rotate-translate scanning of ultrasonic detector array. JOURNAL OF BIOMEDICAL OPTICS 2015; 20:56004. [PMID: 25970085 DOI: 10.1117/1.jbo.20.5.056004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 04/14/2015] [Indexed: 05/08/2023]
Abstract
Photoacoustic imaging can achieve high-resolution three-dimensional (3-D) visualization of optical absorbers at penetration depths of ∼1 cm in biological tissues by detecting optically induced high ultrasound frequencies. Tomographic acquisition with ultrasound linear arrays offers an easy implementation of single-side access, parallelized, and high-frequency detection, but usually comes with an image quality impaired by the directionality of the detectors. Indeed, a simple translation of the array perpendicular to its median imaging plane is often used, but results both in a poor resolution in the translation direction and strong limited-view artifacts.To improve the spatial resolution and the visibility of complex structures while retaining a planar detection geometry, we introduce, in this paper, a rotate-translate scanning scheme and investigate the performance ofa scanner implemented at 15 MHz center frequency. The developed system achieved a quasi-isotropic uniform 3-D resolution of ∼170 μm over a cubic volume of side length 8.5 mm, i.e., an improvement in the resolution in the translation direction by almost one order of magnitude. Dual-wavelength imaging was also demonstrated with ultrafast wavelength shifting. The validity of our approach was shown in vitro. We discuss the ability to enable in vivo imaging for preclinical and clinical studies.
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Affiliation(s)
- Jérôme Gateau
- ESPCI ParisTech, PSL Research University, CNRS UMR 7587, INSERM U979, Institut Langevin, 1 rue Jussieu, F-75005, Paris, FrancebLaboratoire Kastler Brossel, Université Pierre et Marie Curie, Ecole Normale Supérieure, Collège de France, CNRS UMR 8552, 4 Pla
| | - Marc Gesnik
- ESPCI ParisTech, PSL Research University, CNRS UMR 7587, INSERM U979, Institut Langevin, 1 rue Jussieu, F-75005, Paris, France
| | - Jean-Marie Chassot
- ESPCI ParisTech, PSL Research University, CNRS UMR 7587, INSERM U979, Institut Langevin, 1 rue Jussieu, F-75005, Paris, France
| | - Emmanuel Bossy
- ESPCI ParisTech, PSL Research University, CNRS UMR 7587, INSERM U979, Institut Langevin, 1 rue Jussieu, F-75005, Paris, France
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