1
|
Nguyen HNY, Hussain A, Steenbergen W. Reflection artifact identification in photoacoustic imaging using multi-wavelength excitation. Biomed Opt Express 2018; 9:4613-4630. [PMID: 30319890 PMCID: PMC6179390 DOI: 10.1364/boe.9.004613] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 08/27/2018] [Accepted: 08/27/2018] [Indexed: 05/22/2023]
Abstract
Photoacoustic imaging has been a focus of research for clinical applications owing to its ability for deep visualization with optical absorption contrast. However, there are various technical challenges remaining for this technique to find its place in clinics. One of the challenges is the occurrence of reflection artifacts. The reflection artifacts may lead to image misinterpretation. Here we propose a new method using multiple wavelengths for identifying and removing the reflection artifacts. By imaging the sample with multiple wavelengths, the spectral response of the features in the photoacoustic image is obtained. We assume that the spectral response of the reflection artifact is better correlated with the proper image feature of its corresponding absorber than with other features in the image. Based on this, the reflection artifacts can be identified and removed. Here, we experimentally demonstrated the potential of this method for real-time identification and correction of reflection artifacts in photoacoustic images in phantoms as well as in vivo using a handheld photoacoustic imaging probe.
Collapse
Affiliation(s)
- Ho Nhu Y. Nguyen
- Biomedical Photonic Imaging Group, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands
| | - Altaf Hussain
- Biomedical Photonic Imaging Group, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands
| | - Wiendelt Steenbergen
- Biomedical Photonic Imaging Group, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands
| |
Collapse
|
2
|
Kim H, Jo G, Chang JH. Ultrasound-assisted photothermal therapy and real-time treatment monitoring. Biomed Opt Express 2018; 9:4472-4480. [PMID: 30615724 PMCID: PMC6157783 DOI: 10.1364/boe.9.004472] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 07/25/2018] [Accepted: 08/20/2018] [Indexed: 06/09/2023]
Abstract
Photothermal therapy (PTT) has the capability for selective treatment, in which light delivered to the target is converted into heat and subsequently causes coagulative necrosis. However, optical scattering in biological media limits light penetration, thus reducing therapeutic efficacy. Here, we demonstrate that the temperatures generated by light and ultrasound energies can be added constructively in resected melanoma cancers, which causes an increase in treatment depth. This method is called dual thermal therapy (DTT). It is also shown that combined ultrasound and photoacoustic images acquired using the pulse sequence proposed in this paper can be used for real-time monitoring of DTT.
Collapse
Affiliation(s)
- Haemin Kim
- Department of Biomedical Engineering, Sogang University, Seoul, 04107, South Korea
| | - Gyuwon Jo
- Department of Electronic Engineering, Sogang University, Seoul, 04107, South Korea
| | - Jin Ho Chang
- Department of Biomedical Engineering, Sogang University, Seoul, 04107, South Korea
- Department of Electronic Engineering, Sogang University, Seoul, 04107, South Korea
| |
Collapse
|
3
|
Wang Y, Lu T, Li J, Wan W, Ma W, Zhang L, Zhou Z, Jiang J, Zhao H, Gao F. Enhancing sparse-view photoacoustic tomography with combined virtually parallel projecting and spatially adaptive filtering. Biomed Opt Express 2018; 9:4569-4587. [PMID: 30615725 PMCID: PMC6157779 DOI: 10.1364/boe.9.004569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 07/25/2018] [Accepted: 08/16/2018] [Indexed: 05/10/2023]
Abstract
To fully realize the potential of photoacoustic tomography (PAT) in preclinical and clinical applications, rapid measurements and robust reconstructions are needed. Sparse-view measurements have been adopted effectively to accelerate the data acquisition. However, since the reconstruction from the sparse-view sampling data is challenging, both the effective measurement and the appropriate reconstruction should be taken into account. In this study, we present an iterative sparse-view PAT reconstruction scheme, where a concept of virtual parallel-projection matching the measurement condition is introduced to aid the "compressive sensing" in the reconstruction procedure, and meanwhile, the non-local spatially adaptive filtering exploring the a priori information of the mutual similarities in natural images is adopted to recover the unknowns in the transformed sparse domain. Consequently, the reconstructed images with the proposed sparse-view scheme can be evidently improved in comparison to those with the universal back-projection method, for the cases of same sparse views. The proposed approach has been validated by the simulations and ex vivo experiments, which exhibits desirable performances in image fidelity even from a small number of measuring positions.
Collapse
Affiliation(s)
- Yihan Wang
- College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
- These authors contributed equally to the work
| | - Tong Lu
- College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
- These authors contributed equally to the work
| | - Jiao Li
- College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
- Tianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, Tianjin 300072, China
| | - Wenbo Wan
- College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
| | - Wenjuan Ma
- Cancer Institute and Hospital, Tianjin Medical University, Tianjin 300060, China
| | - Limin Zhang
- College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
- Tianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, Tianjin 300072, China
| | - Zhongxing Zhou
- College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
- Tianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, Tianjin 300072, China
| | - Jingying Jiang
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Huijuan Zhao
- College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
- Tianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, Tianjin 300072, China
| | - Feng Gao
- College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
- Tianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, Tianjin 300072, China
| |
Collapse
|
4
|
Hallam KA, Donnelly EM, Karpiouk AB, Hartman RK, Emelianov SY. Laser-activated perfluorocarbon nanodroplets: a new tool for blood brain barrier opening. Biomed Opt Express 2018; 9:4527-4538. [PMID: 30615730 PMCID: PMC6157760 DOI: 10.1364/boe.9.004527] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 08/08/2018] [Accepted: 08/20/2018] [Indexed: 05/03/2023]
Abstract
A major obstacle in the monitoring and treatment of neurological diseases is the blood brain barrier (BBB), a semipermeable barrier that prevents the delivery of many therapeutics and imaging contrast agents to the brain. In this work, we explored the possibility of laser-activated perfluorocarbon nanodroplets (PFCnDs) to open the BBB and deliver agents to the brain tissue. Specifically, near infrared (NIR) dye-loaded PFCnDs comprised of a perfluorocarbon (PFC) core with a boiling point above physiological temperature were repeatedly vaporized and recondensed from liquid droplet to gas bubble under pulsed laser excitation. As a result, this pulse-to-pulse repeated behavior enabled the recurring interaction of PFCnDs with the endothelial lining of the BBB, allowing for a BBB opening and extravasation of dye into the brain tissue. The blood brain barrier opening and delivery of agents to tissue was confirmed on the macro and the molecular level by evaluating Evans Blue staining, ultrasound-guided photoacoustic (USPA) imaging, and histological tissue analysis. The demonstrated PFCnD-assisted pulsed laser method for BBB opening, therefore, represents a tool that has the potential to enable non-invasive, cost-effective, and efficient image-guided delivery of contrast and therapeutic agents to the brain.
Collapse
Affiliation(s)
- Kristina A. Hallam
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA, USA
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Eleanor M. Donnelly
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Andrei B. Karpiouk
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Robin K. Hartman
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Stanislav Y. Emelianov
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA, USA
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| |
Collapse
|
5
|
Anas EMA, Zhang HK, Kang J, Boctor E. Enabling fast and high quality LED photoacoustic imaging: a recurrent neural networks based approach. Biomed Opt Express 2018; 9:3852-3866. [PMID: 30338160 PMCID: PMC6191624 DOI: 10.1364/boe.9.003852] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 06/26/2018] [Accepted: 07/11/2018] [Indexed: 05/04/2023]
Abstract
Photoacoustic (PA) techniques have shown promise in the imaging of tissue chromophores and exogenous contrast agents in various clinical applications. However, the key drawback of current PA technology is its dependence on a complex and hazardous laser system for the excitation of a tissue sample. Although light-emitting diodes (LED) have the potential to replace the laser, the image quality of an LED-based system is severely corrupted due to the low output power of LED elements. The current standard way to improve the quality is to increase the scanning time, which leads to a reduction in the imaging speed and makes the images prone to motion artifacts. To address the challenges of longer scanning time and poor image quality, in this work we present a deep neural networks based approach that exploits the temporal information in PA images using a recurrent neural network. We train our network using 32 phantom experiments; on the test set of 30 phantom experiments, we achieve a gain in the frame rate of 8 times with a mean peak-signal-to-noise-ratio of 35.4 dB compared to the standard technique.
Collapse
Affiliation(s)
| | - Haichong K. Zhang
- Electrical and Computer Engineering, Johns Hopkins University, Baltimore, MD,
USA
| | - Jin Kang
- Electrical and Computer Engineering, Johns Hopkins University, Baltimore, MD,
USA
| | - Emad Boctor
- Electrical and Computer Engineering, Johns Hopkins University, Baltimore, MD,
USA
- Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD,
USA
| |
Collapse
|
6
|
Chen Z, Deán-Ben XL, Gottschalk S, Razansky D. Performance of optoacoustic and fluorescence imaging in detecting deep-seated fluorescent agents. Biomed Opt Express 2018; 9:2229-2239. [PMID: 29760983 PMCID: PMC5946784 DOI: 10.1364/boe.9.002229] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 03/08/2018] [Accepted: 03/09/2018] [Indexed: 05/03/2023]
Abstract
Fluorescent contrast agents are widely employed in biomedical research. While many studies have reported deep tissue imaging of fluorescent moieties using either fluorescence-based or absorption-based (optoacoustic) imaging systems, no systematic comparison has been performed regarding the actual performance of these imaging modalities in detecting deep-seated fluorescent agents. Herein, an integrated imager combining epi-fluorescence and volumetric optoacoustic imaging capabilities has been employed in order to evaluate image degradation with depth for several commonly-used near-infrared dyes in both modes. We performed controlled experiments in tissue-mimicking phantoms containing deeply embedded targets filled with different concentrations of Alexa Fluor 700, Alexa Fluor 750, indocyanine green (ICG) and IRDye 800CW. The results are further corroborated by multi-modal imaging of ICG through mouse tissues in vivo. It is shown that optoacoustics consistently provides better sensitivity in differentiating fluorescent targets located at depths beyond 2 mm in turbid tissues, as quantified by evaluating image contrast, signal to noise ratio and spatial resolution performance.
Collapse
Affiliation(s)
- Zhenyue Chen
- Institute for Biological and Medical Imaging (IBMI), Helmholtz Center Munich, Ingolstädter Landstr. 1, 85764 Neuherberg, Germany
| | - Xosé Luís Deán-Ben
- Institute for Biological and Medical Imaging (IBMI), Helmholtz Center Munich, Ingolstädter Landstr. 1, 85764 Neuherberg, Germany
| | - Sven Gottschalk
- Institute for Biological and Medical Imaging (IBMI), Helmholtz Center Munich, Ingolstädter Landstr. 1, 85764 Neuherberg, Germany
| | - Daniel Razansky
- Institute for Biological and Medical Imaging (IBMI), Helmholtz Center Munich, Ingolstädter Landstr. 1, 85764 Neuherberg, Germany
- Faculty of Medicine, Technical University of Munich, Ismaninger Str. 22, 81675 Munich, Germany
| |
Collapse
|
7
|
Abstract
Photoacoustic computed tomography (PACT), a fast-developing modality for deep tissue imaging, images the spatial distribution of optical absorption. PACT usually treats the absorption coefficient as a scalar. However, the absorption coefficients of many biological tissues exhibit an anisotropic property, known as dichroism or diattenuation, which depends on molecular conformation and structural alignment. Here we present a novel imaging method called dichroism-sensitive PACT (DS-PACT), which measures both the amplitude of tissue's dichroism and the orientation of the optic axis of uniaxial dichroic tissue. By modulating the polarization of linearly polarized light and measuring the alternating signals through lock-in detection, DS-PACT can boost dichroic signals from biological tissues. To validate the proposed approach, we experimentally demonstrated the performance of DS-PACT by imaging plastic polarizers and ex vivo bovine tendons deep inside scattering media. We successfully detected the orientation of the optic axis of uniaxial dichroic materials, even at a depth of 4.5 transport mean free paths. We anticipate that the proposed method will extend the capability of PACT to imaging tissue absorption anisotropy.
Collapse
Affiliation(s)
- Yuan Qu
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, USA
| | - Lei Li
- Caltech Optical Imaging Laboratory, Andrew and Peggy Cherng Department of Medical Engineering and Department of Electrical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Yuecheng Shen
- Caltech Optical Imaging Laboratory, Andrew and Peggy Cherng Department of Medical Engineering and Department of Electrical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Xiaoming Wei
- Caltech Optical Imaging Laboratory, Andrew and Peggy Cherng Department of Medical Engineering and Department of Electrical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Terence T.W. Wong
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, USA
- Caltech Optical Imaging Laboratory, Andrew and Peggy Cherng Department of Medical Engineering and Department of Electrical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Peng Hu
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, USA
| | - Junjie Yao
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, USA
| | - Konstantin Maslov
- Caltech Optical Imaging Laboratory, Andrew and Peggy Cherng Department of Medical Engineering and Department of Electrical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Lihong V. Wang
- Caltech Optical Imaging Laboratory, Andrew and Peggy Cherng Department of Medical Engineering and Department of Electrical Engineering, California Institute of Technology, Pasadena, California 91125, USA
- Corresponding author:
| |
Collapse
|
8
|
Li M, Liu C, Gong X, Zheng R, Bai Y, Xing M, Du X, Liu X, Zeng J, Lin R, Zhou H, Wang S, Lu G, Zhu W, Fang C, Song L. Linear array-based real-time photoacoustic imaging system with a compact coaxial excitation handheld probe for noninvasive sentinel lymph node mapping. Biomed Opt Express 2018; 9:1408-1422. [PMID: 29675292 PMCID: PMC5905896 DOI: 10.1364/boe.9.001408] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 12/21/2017] [Accepted: 01/08/2018] [Indexed: 05/04/2023]
Abstract
We developed a linear ultrasound array-based real-time photoacoustic imaging system with a compact coaxial excitation handheld photoacoustic imaging probe for guiding sentinel lymph node (SLN) needle biopsy. Compared with previous studies, our system and probe have the following advantages: (1) the imaging probe is quite compact and user-friendly; (2) laser illumination and ultrasonic detection are achieved coaxially, enabling high signal-to-noise ratio; and (3) GPU-based image reconstruction enables real-time imaging and displaying at a frame rate of 20 Hz. With the system and probe, clear visualization of the SLN at the depth of 2 cm (~human SLN depth) was demonstrated on a living rat. A fine needle was pushed towards the SLN based on the guidance of real-time photoacoustic imaging. The proposed photoacoustic imaging system and probe was shown to have great potential to be used in clinics for guiding SLN needle biopsy, which may reduce the high morbidity rate related to the current gold standard clinical SLN biopsy procedure.
Collapse
Affiliation(s)
- Mucong Li
- Research Laboratory for Biomedical Optics and Molecular Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
- Equal Contribution
| | - Chengbo Liu
- Research Laboratory for Biomedical Optics and Molecular Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
- Beijing Center for Mathematics and Information Interdisciplinary Sciences (BCMIIS), Beijing 100048, China
- Equal Contribution
| | - Xiaojing Gong
- Research Laboratory for Biomedical Optics and Molecular Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Rongqin Zheng
- Department of Medical Ultrasound, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Yuanyuan Bai
- Research Laboratory for Biomedical Optics and Molecular Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Muyue Xing
- Research Laboratory for Biomedical Optics and Molecular Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Xuemin Du
- Research Laboratory for Biomedical Optics and Molecular Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Xiaoyang Liu
- Research Laboratory for Biomedical Optics and Molecular Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Jing Zeng
- Research Laboratory for Biomedical Optics and Molecular Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Riqiang Lin
- Research Laboratory for Biomedical Optics and Molecular Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Huichao Zhou
- Department of Medical Ultrasound, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Shouju Wang
- Department of Medical Imaging, Jinling Hospital, Nanjing University, Nanjing 210002, China
| | - Guangming Lu
- Department of Medical Imaging, Jinling Hospital, Nanjing University, Nanjing 210002, China
| | - Wen Zhu
- Department of Hepatobiliary Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
| | - Chihua Fang
- Department of Hepatobiliary Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
| | - Liang Song
- Research Laboratory for Biomedical Optics and Molecular Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
- Beijing Center for Mathematics and Information Interdisciplinary Sciences (BCMIIS), Beijing 100048, China
| |
Collapse
|
9
|
Dasa MK, Markos C, Maria M, Petersen CR, Moselund PM, Bang O. High-pulse energy supercontinuum laser for high-resolution spectroscopic photoacoustic imaging of lipids in the 1650-1850 nm region. Biomed Opt Express 2018; 9:1762-1770. [PMID: 29675317 PMCID: PMC5905921 DOI: 10.1364/boe.9.001762] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 03/09/2018] [Accepted: 03/13/2018] [Indexed: 05/22/2023]
Abstract
We propose a cost-effective high-pulse energy supercontinuum (SC) source based on a telecom range diode laser-based amplifier and a few meters of standard single-mode optical fiber, with a pulse energy density as high as ~25 nJ/nm in the 1650-1850 nm regime (factor >3 times higher than any SC source ever used in this wavelength range). We demonstrate how such an SC source combined with a tunable filter allows high-resolution spectroscopic photoacoustic imaging and the spectroscopy of lipids in the first overtone transition band of C-H bonds (1650-1850 nm). We show the successful discrimination of two different lipids (cholesterol and lipid in adipose tissue) and the photoacoustic cross-sectional scan of lipid-rich adipose tissue at three different locations. The proposed high-pulse energy SC laser paves a new direction towards compact, broadband and cost-effective source for spectroscopic photoacoustic imaging.
Collapse
Affiliation(s)
- Manoj Kumar Dasa
- Department of Photonics Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Christos Markos
- Department of Photonics Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Michael Maria
- Department of Photonics Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Christian R. Petersen
- Department of Photonics Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | | | - Ole Bang
- Department of Photonics Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
- NKT Photonics A/S, Blokken 84, Birkerød 3460, Denmark
| |
Collapse
|
10
|
Zhu Y, Johnson LA, Huang Z, Rubin JM, Yuan J, Lei H, Ni J, Wang X, Higgins PDR, Xu G. Identifying intestinal fibrosis and inflammation by spectroscopic photoacoustic imaging: an animal study in vivo. Biomed Opt Express 2018; 9:1590-1600. [PMID: 29675304 PMCID: PMC5905908 DOI: 10.1364/boe.9.001590] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 02/23/2018] [Accepted: 02/26/2018] [Indexed: 05/05/2023]
Abstract
Crohn's disease (CD) is a chronic autoimmune disease characterized by obstructing intestinal strictures. Conventional imaging modalities can identify the strictures but cannot characterize whether a stricture is predominantly inflammatory or fibrotic. The purpose of this study is to examine the capability of photoacoustic (PA) imaging to characterize intestinal fibrosis and inflammation in vivo. Intestinal strictures in a rat model of CD were imaged with a PA-ultrasound parallel imaging system. Internal and external illuminations were attempted, both with transcutaneous PA signal reception. The PA signal magnitudes acquired at wavelengths targeting individual molecular components and the derived functional information showed significant differences between the inflammatory and fibrotic strictures, consistent with histological inflammation and fibrosis.
Collapse
Affiliation(s)
- Yunhao Zhu
- Department of Electronic Science and Engineering, Nanjing University, Nanjing, Jiangsu 21000, China
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Laura A. Johnson
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Ziyi Huang
- Department of Electrical and Computer Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jonathan M. Rubin
- Department of Radiology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Jie Yuan
- Department of Electronic Science and Engineering, Nanjing University, Nanjing, Jiangsu 21000, China
| | - Hao Lei
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jun Ni
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Xueding Wang
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Peter D. R. Higgins
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Guan Xu
- Department of Radiology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| |
Collapse
|
11
|
Iskander-Rizk S, Kruizinga P, van der Steen AFW, van Soest G. Spectroscopic photoacoustic imaging of radiofrequency ablation in the left atrium. Biomed Opt Express 2018; 9:1309-1322. [PMID: 29541523 PMCID: PMC5846533 DOI: 10.1364/boe.9.001309] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 01/16/2018] [Accepted: 01/31/2018] [Indexed: 05/20/2023]
Abstract
Catheter-based radiofrequency ablation for atrial fibrillation has long-term success in 60-70% of cases. A better assessment of lesion quality, depth, and continuity could improve the procedure's outcome. We investigate here photoacoustic contrast between ablated and healthy atrial-wall tissue in vitro in wavelengths spanning from 410 nm to 1000 nm. We studied single- and multi-wavelength imaging of ablation lesions and we demonstrate that a two-wavelength technique yields precise detection of lesions, achieving a diagnostic accuracy of 97%. We compare this with a best single-wavelength (640 nm) analysis that correctly identifies 82% of lesions. We discuss the origin of relevant spectroscopic features and perspectives for translation to clinical imaging.
Collapse
Affiliation(s)
- Sophinese Iskander-Rizk
- Biomedical Engineering Department, Thorax Center-Erasmus MC, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Pieter Kruizinga
- Biomedical Engineering Department, Thorax Center-Erasmus MC, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
- ImPhys, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | - Antonius F. W. van der Steen
- Biomedical Engineering Department, Thorax Center-Erasmus MC, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
- ImPhys, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | - Gijs van Soest
- Biomedical Engineering Department, Thorax Center-Erasmus MC, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| |
Collapse
|
12
|
An L, Saratoon T, Fonseca M, Ellwood R, Cox B. Statistical independence in nonlinear model-based inversion for quantitative photoacoustic tomography. Biomed Opt Express 2017; 8:5297-5310. [PMID: 29188121 PMCID: PMC5695971 DOI: 10.1364/boe.8.005297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 09/26/2017] [Accepted: 09/26/2017] [Indexed: 06/07/2023]
Abstract
The statistical independence between the distributions of different chromophores in tissue has previously been used for linear unmixing with independent component analysis (ICA). In this study, we propose exploiting this statistical property in a nonlinear model-based inversion method. The aim is to reduce the sensitivity of the inversion scheme to errors in the modelling of the fluence, and hence provide more accurate quantification of the concentration of independent chromophores. A gradient-based optimisation algorithm is used to minimise the error functional, which includes a term representing the mutual information between the chromophores in addition to the standard least-squares data error. Both numerical simulations and an experimental phantom study are conducted to demonstrate that, in the presence of experimental errors in the fluence model, the proposed inversion method results in more accurate estimation of the concentrations of independent chromophores compared to the standard model-based inversion.
Collapse
Affiliation(s)
- Lu An
- Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, WC1E 6BT,
UK
| | - Teedah Saratoon
- Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, WC1E 6BT,
UK
| | - Martina Fonseca
- Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, WC1E 6BT,
UK
| | - Robert Ellwood
- Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, WC1E 6BT,
UK
| | - Ben Cox
- Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, WC1E 6BT,
UK
| |
Collapse
|
13
|
Bauer-Marschallinger J, Felbermayer K, Berer T. All-optical photoacoustic projection imaging. Biomed Opt Express 2017; 8:3938-3951. [PMID: 29026680 PMCID: PMC5611914 DOI: 10.1364/boe.8.003938] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 07/28/2017] [Accepted: 07/31/2017] [Indexed: 05/19/2023]
Abstract
We introduce all-optical photoacoustic projection imaging. An array of fiber-optic interferometers is used to measure photoacoustic signals. The obtained images represent the projection of the three-dimensional spatial light absorbance within a sample onto a two-dimensional plane. We assess the performance of the system by phantom measurements and show that the fiber-optic detectors achieve a noise-equivalent pressure of 24 Pascal at a 10 MHz bandwidth. Furthermore, we demonstrate the ability to acquire high-resolution projection images of large volumes within a short period of time.
Collapse
|
14
|
Wang Y, He J, Li J, Lu T, Li Y, Ma W, Zhang L, Zhou Z, Zhao H, Gao F. Toward whole-body quantitative photoacoustic tomography of small-animals with multi-angle light-sheet illuminations. Biomed Opt Express 2017; 8:3778-3795. [PMID: 28856049 PMCID: PMC5560840 DOI: 10.1364/boe.8.003778] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 07/14/2017] [Accepted: 07/19/2017] [Indexed: 05/31/2023]
Abstract
Several attempts to achieve the quantitative photoacoustic tomography (q-PAT) have been investigated using point sources or a single-angle wide-field illumination. However, these schemes normally suffer from low signal-to-noise ratio (SNR) or poor quantification in imaging applications on large-size domains, due to the limitation of ANSI-safety incidence and incompleteness in the data acquisition. We herein present a q-PAT implementation that uses multi-angle light-sheet illuminations and calibrated recovering-and-averaging iterations. The scheme can obtain more complete information on the intrinsic absorption from the multi-angle illumination mode, and collect SNR-boosted photoacoustic signals in the selected planes from the wide-field light-sheet excitation. Therefore, the sliced absorption maps over whole body of small-animals can be recovered in a measurement-flexible, noise-robust and computation-economic way. The proposed approach is validated by phantom, ex vivo and in vivo experiments, exhibiting promising performances in image fidelity and quantitative accuracy for practical applications.
Collapse
Affiliation(s)
- Yihan Wang
- College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
| | - Jie He
- College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
| | - Jiao Li
- College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
- Tianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, Tianjin 300072, China
| | - Tong Lu
- College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
| | - Yong Li
- Cancer Institute and Hospital, Tianjin Medical University, Tianjin 300060, China
| | - Wenjuan Ma
- Cancer Institute and Hospital, Tianjin Medical University, Tianjin 300060, China
| | - Limin Zhang
- College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
- Tianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, Tianjin 300072, China
| | - Zhongxing Zhou
- College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
- Tianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, Tianjin 300072, China
| | - Huijuan Zhao
- College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
- Tianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, Tianjin 300072, China
| | - Feng Gao
- College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
- Tianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, Tianjin 300072, China
| |
Collapse
|
15
|
Yang M, Zhao L, He X, Su N, Zhao C, Tang H, Hong T, Li W, Yang F, Lin L, Zhang B, Zhang R, Jiang Y, Li C. Photoacoustic/ultrasound dual imaging of human thyroid cancers: an initial clinical study. Biomed Opt Express 2017; 8:3449-3457. [PMID: 28717580 PMCID: PMC5508841 DOI: 10.1364/boe.8.003449] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 05/15/2017] [Accepted: 06/19/2017] [Indexed: 05/18/2023]
Abstract
We reported an initial clinical study of in vivo human thyroid by a photoacoustic/ultrasound handheld probe. Our dual-modality system is based on a high-end clinical ultrasound machine. Both healthy and cancerous thyroids were imaged non-invasively, and we compared the photoacoustic imaging with color Doppler ultrasound. The results of photoacoustic thyroid imaging could reveal many blood vessels that were not sensitive for Doppler ultrasound. Our study demonstrated that photoacoustic imaging could provide important complementary information for traditional ultrasound thyroid examination, which has a great potential for clinical diagnosis.
Collapse
Affiliation(s)
- Meng Yang
- Department of Ultrasonography, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
- These authors contributed equally to this work
| | - Lingyi Zhao
- Department of Biomedical Engineering, College of Engineering, Peking University, Beijing, China
- These authors contributed equally to this work
| | - Xujin He
- Shenzhen Mindray Bio-Medical Electronics Co., Ltd., Shenzhen, China
| | - Na Su
- Department of Ultrasonography, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - ChenYang Zhao
- Department of Ultrasonography, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Hewen Tang
- Department of Ultrasonography, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Tao Hong
- Department of Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Wenbo Li
- Department of Ultrasonography, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Fang Yang
- Shenzhen Mindray Bio-Medical Electronics Co., Ltd., Shenzhen, China
| | - Lin Lin
- Department of Ultrasonography, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Bing Zhang
- Department of Ultrasonography, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Rui Zhang
- Department of Ultrasonography, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Yuxin Jiang
- Department of Ultrasonography, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Changhui Li
- Department of Biomedical Engineering, College of Engineering, Peking University, Beijing, China
| |
Collapse
|
16
|
Yang S, Qin W, Guo H, Jin T, Huang N, He M, Xi L. Design and evaluation of a compound acoustic lens for photoacoustic computed tomography. Biomed Opt Express 2017; 8:2756-2765. [PMID: 28663904 PMCID: PMC5480511 DOI: 10.1364/boe.8.002756] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 03/23/2017] [Accepted: 04/19/2017] [Indexed: 05/19/2023]
Abstract
In photoacoustic computed tomography, the limited directivity of the detectors may cause deformation of off-center targets and lead to an imbalanced resolution in the imaging area. To improve the directivity of the acoustic detectors, several negative acoustic lenses have been proposed. In this study, we develop a new compound acoustic lens fabricated by integrating a concave polydimethylsiloxane (PDMS) lens and a convex epoxy lens. Both theoretical simulations and experimental evaluations demonstrate that the compound lens provides a larger directivity compared to single lenses made of PDMS, epoxy, and liquid. The measured acceptance angles of a 6-mm piezoelectric acoustic transducer equipped with the compound, epoxy, liquid, and PDMS lenses are 55°, 36°, 25°, and 20°, respectively. No deformation is observed in the off-center targets by using compound lens. However, serious deformation appears in the cases using single lenses.
Collapse
Affiliation(s)
- Shirui Yang
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
- These authors contributed equally to this work
| | - Wei Qin
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
- These authors contributed equally to this work
| | - Heng Guo
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Tian Jin
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Na Huang
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Ming He
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Lei Xi
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
- Center for Information in Biomedicine, University of Electronic Science and Technology of China, Chengdu 610054, China
| |
Collapse
|
17
|
Wu D, Yang J, Zhang G, Jiang H. Noninvasive in vivo monitoring of collagenase induced intracerebral hemorrhage by photoacoustic tomography. Biomed Opt Express 2017; 8:2276-2286. [PMID: 28736671 PMCID: PMC5516818 DOI: 10.1364/boe.8.002276] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 03/11/2017] [Accepted: 03/15/2017] [Indexed: 05/03/2023]
Abstract
Photoacoustic tomography (PAT) is an emerging noninvasive biomedical imaging modality that can be used for visualizing the structure and function of brain in high resolution. Here we report an application of PAT to imaging intracerebral hemorrhage (ICH) in a mouse model. In vivo photoacoustic images were obtained in mice with right basal ganglia hemorrhage induced by microinjection of collagenase. With multi-spectral light excitation, cortical vascular network was clearly revealed at 532 nm, and ICH associated hematoma lesions and perihemmatoma regions were accurately mapped over time at 750 nm and 875 nm, respectively. Our results suggest that PAT provides a unique tool for visualizing hemodynamics involved in brain diseases such as ICH.
Collapse
Affiliation(s)
- Dan Wu
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
- Center for Information in Biomedicine, University of Electronic Science and Technology of China, Sichuan, China
| | - Jinge Yang
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
- Center for Information in Biomedicine, University of Electronic Science and Technology of China, Sichuan, China
| | - Guang Zhang
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
- Center for Information in Biomedicine, University of Electronic Science and Technology of China, Sichuan, China
| | - Huabei Jiang
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
- Center for Information in Biomedicine, University of Electronic Science and Technology of China, Sichuan, China
- Department of Medical Engineering, University of South Florida, Tampa, FL 33620, USA
| |
Collapse
|
18
|
Singh MKA, Jaeger M, Frenz M, Steenbergen W. Photoacoustic reflection artifact reduction using photoacoustic-guided focused ultrasound: comparison between plane-wave and element-by-element synthetic backpropagation approach. Biomed Opt Express 2017; 8:2245-2260. [PMID: 28736669 PMCID: PMC5516831 DOI: 10.1364/boe.8.002245] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 03/06/2017] [Accepted: 03/13/2017] [Indexed: 05/07/2023]
Abstract
Reflection artifacts caused by acoustic inhomogeneities constitute a major problem in epi-mode biomedical photoacoustic imaging. Photoacoustic transients from the skin and superficial optical absorbers traverse into the tissue and reflect off echogenic structures to generate reflection artifacts. These artifacts cause difficulties in the interpretation of images and reduce contrast and imaging depth. We recently developed a method called PAFUSion (photoacoustic-guided focused ultrasound) to circumvent the problem of reflection artifacts in photoacoustic imaging. We already demonstrated that the photoacoustic signals can be backpropagated using synthetic aperture pulse-echo data for identifying and reducing reflection artifacts in vivo. In this work, we propose an alternative variant of PAFUSion in which synthetic backpropagation of photoacoustic signals is based on multi-angled plane-wave ultrasound measurements. We implemented plane-wave and synthetic aperture PAFUSion in a handheld ultrasound/photoacoustic imaging system and demonstrate reduction of reflection artifacts in phantoms and in vivo measurements on a human finger using both approaches. Our results suggest that, while both approaches are equivalent in terms of artifact reduction efficiency, plane-wave PAFUSion requires less pulse echo acquisitions when the skin absorption is the main cause of reflection artifacts.
Collapse
Affiliation(s)
- Mithun Kuniyil Ajith Singh
- Biomedical Photonic Imaging Group, MIRA institute for Biomedical Technology and Technical Medicine, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Michael Jaeger
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
| | - Martin Frenz
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
| | - Wiendelt Steenbergen
- Biomedical Photonic Imaging Group, MIRA institute for Biomedical Technology and Technical Medicine, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| |
Collapse
|
19
|
Bayer CL, Wlodarczyk BJ, Finnell RH, Emelianov SY. Ultrasound-guided spectral photoacoustic imaging of hemoglobin oxygenation during development. Biomed Opt Express 2017; 8:757-763. [PMID: 28270982 PMCID: PMC5330552 DOI: 10.1364/boe.8.000757] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 12/19/2016] [Accepted: 12/23/2016] [Indexed: 05/06/2023]
Abstract
Few technologies are capable of imaging in vivo function during development. In this study, we have implemented spectral photoacoustic imaging to estimate tissue oxygenation longitudinally in pregnant mice. We used the spectral photoacoustic signal to estimate hemoglobin oxygen saturation within intact, in vivo mouse concepti from developmental day (E) 8.5 to E16.5-a first step towards functional imaging of the maternal-fetal environment. Future work will apply these methods to compare longitudinal functional changes during normal vs abnormal development of embryos, fetuses, and placentas.
Collapse
Affiliation(s)
- Carolyn L. Bayer
- Department of Biomedical Engineering, The University of Texas at Austin, 1 University Station, Austin, TX 78712, USA
- Currently with the Department of Biomedical Engineering, Tulane University, 500 Lindy Boggs Center, New Orleans, LA 70118, USA
| | - Bogdan J. Wlodarczyk
- Dell Pediatric Research Institute, Department of Nutritional Sciences, The University of Texas at Austin, 1400 Barbara Jordan Blvd, Austin, TX 78723, USA
| | - Richard H. Finnell
- Dell Pediatric Research Institute, Department of Nutritional Sciences, The University of Texas at Austin, 1400 Barbara Jordan Blvd, Austin, TX 78723, USA
| | - Stanislav Y. Emelianov
- Department of Biomedical Engineering, The University of Texas at Austin, 1 University Station, Austin, TX 78712, USA
- Currently with the School of Electrical and Computer Engineering, Georgia Institute of Technology, 777 Atlantic Drive NW, Atlanta, GA 30332, USA
| |
Collapse
|
20
|
van den Berg PJ, Bansal R, Daoudi K, Steenbergen W, Prakash J. Preclinical detection of liver fibrosis using dual-modality photoacoustic/ultrasound system. Biomed Opt Express 2016; 7:5081-5091. [PMID: 28018726 PMCID: PMC5175553 DOI: 10.1364/boe.7.005081] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 10/09/2016] [Accepted: 10/18/2016] [Indexed: 05/07/2023]
Abstract
Liver fibrosis is a major cause for increasing mortality worldwide. Preclinical research using animal models is required for the discovery of new anti-fibrotic therapies, but currently relies on endpoint liver histology. In this study, we investigated a cost-effective and portable photoacoustic/ultrasound (PA/US) imaging system as a potential non-invasive alternative. Fibrosis was induced in mice using CCl4 followed by liver imaging and histological analysis. Imaging showed significantly increased PA features with higher frequency signals in fibrotic livers versus healthy livers. This corresponds to more heterogeneous liver structure resulting from collagen deposition and angiogenesis. Importantly, PA response and its frequency were highly correlated with histological parameters. These results demonstrate the preclinical feasibility of the PA imaging approach and applicability of dual PA/US system.
Collapse
Affiliation(s)
- Pim J van den Berg
- Biomedical Photonic Imaging, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, 7500 AE, Enschede, The Netherlands; These authors contributed equally to the work;
| | - Ruchi Bansal
- Targeted Therapeutics, Department of Biomaterials Science and Technology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, 7500 AE, Enschede, The Netherlands; These authors contributed equally to the work;
| | - Khalid Daoudi
- Biomedical Photonic Imaging, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, 7500 AE, Enschede, The Netherlands
| | - Wiendelt Steenbergen
- Biomedical Photonic Imaging, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, 7500 AE, Enschede, The Netherlands; These authors contributed equally to the work
| | - Jai Prakash
- Targeted Therapeutics, Department of Biomaterials Science and Technology, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, 7500 AE, Enschede, The Netherlands; These authors contributed equally to the work
| |
Collapse
|
21
|
Castelino RF, Hynes M, Munding CE, Telenkov S, Foster FS. Combined frequency domain photoacoustic and ultrasound imaging for intravascular applications. Biomed Opt Express 2016; 7:4441-4449. [PMID: 27895986 PMCID: PMC5119586 DOI: 10.1364/boe.7.004441] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 09/27/2016] [Accepted: 09/30/2016] [Indexed: 05/07/2023]
Abstract
Intravascular photoacoustic (IVPA) imaging has the potential to characterize lipid-rich structures based on the optical absorption contrast of tissues. In this study, we explore frequency domain photoacoustics (FDPA) for intravascular applications. The system employed an intensity-modulated continuous wave (CW) laser diode, delivering 1W over an intensity modulated chirp frequency of 4-12MHz. We demonstrated the feasibility of this approach on an agar vessel phantom with graphite and lipid targets, imaged using a planar acoustic transducer co-aligned with an optical fibre, allowing for the co-registration of IVUS and FDPA images. A frequency domain correlation method was used for signal processing and image reconstruction. The graphite and lipid targets show an increase in FDPA signal as compared to the background of 21dB and 16dB, respectively. Use of compact CW laser diodes may provide a valuable alternative for the development of photoacoustic intravascular devices instead of pulsed laser systems.
Collapse
Affiliation(s)
- Robin F. Castelino
- Medical Biophysics, University of Toronto, 5 King’s College Road, Toronto, ON M5S 3G8, Canada
- Imaging Research, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada
| | - Michael Hynes
- Imaging Research, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada
| | - Chelsea E. Munding
- Medical Biophysics, University of Toronto, 5 King’s College Road, Toronto, ON M5S 3G8, Canada
- Imaging Research, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada
| | - Sergey Telenkov
- PHAST Imaging, 1B Richview Road, Toronto, ON M9A 4M6, Canada
| | - F. Stuart Foster
- Medical Biophysics, University of Toronto, 5 King’s College Road, Toronto, ON M5S 3G8, Canada
- Imaging Research, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada
| |
Collapse
|
22
|
Subochev P, Orlova A, Mikhailova I, Shilyagina N, Turchin I. Simultaneous in vivo imaging of diffuse optical reflectance, optoacoustic pressure and ultrasonic scattering. Biomed Opt 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] [What about the content of this article? (0)] [Affiliation(s)] [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.
Collapse
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
| |
Collapse
|
23
|
Preisser S, Rohringer W, Liu M, Kollmann C, Zotter S, Fischer B, Drexler W. All-optical highly sensitive akinetic sensor for ultrasound detection and photoacoustic imaging. Biomed Opt Express 2016; 7:4171-4186. [PMID: 27867723 PMCID: PMC5102516 DOI: 10.1364/boe.7.004171] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 09/07/2016] [Accepted: 09/12/2016] [Indexed: 05/03/2023]
Abstract
A novel all-optical akinetic ultrasound sensor, consisting of a rigid, fiber-coupled Fabry-Pérot etalon with a transparent central opening is presented. The sensing principle relies exclusively on the detection of pressure-induced changes of the refractive index in the fluid filling the Fabry-Pérot cavity. This enables resonance-free, inherently linear signal detection over a broad bandwidth. We demonstrate that the sensor achieves a exceptionally low peak noise equivalent pressure (NEP) values of 2 Pa over a 20 MHz measurement bandwidth (without signal averaging), while maintaining a flat frequency response, and a detection bandwidth up to 22.5 MHz (-6 dB). The measured large full field of view of the sensor is 2.7 mm × 1.3 mm and the dynamic range is [Formula: see text] or 63 dB at 20 MHz bandwidth. For different required amplitude ranges the upper amplitude detection limit can be customized from at least 2 kPa to 2 MPa by using cavity mirrors with a lower optical reflectivity. Imaging tests on a resolution target and on biological tissue show the excellent suitability of the akinetic sensor for optical resolution photoacoustic microscopy (OR-PAM) applications.
Collapse
Affiliation(s)
- Stefan Preisser
- XARION Laser Acoustics GmbH, Ghegastraße 3, 1030, Vienna,
Austria
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, AKH 4L, 1090, Vienna,
Austria
| | - Wolfgang Rohringer
- XARION Laser Acoustics GmbH, Ghegastraße 3, 1030, Vienna,
Austria
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, AKH 4L, 1090, Vienna,
Austria
| | - Mengyang Liu
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, AKH 4L, 1090, Vienna,
Austria
| | - Christian Kollmann
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, AKH 4L, 1090, Vienna,
Austria
| | - Stefan Zotter
- XARION Laser Acoustics GmbH, Ghegastraße 3, 1030, Vienna,
Austria
| | | | - Wolfgang Drexler
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, AKH 4L, 1090, Vienna,
Austria
| |
Collapse
|
24
|
Perekatova V, Subochev P, Kleshnin M, Turchin I. Optimal wavelengths for optoacoustic measurements of blood oxygen saturation in biological tissues. Biomed Opt Express 2016; 7:3979-3995. [PMID: 27867709 PMCID: PMC5102547 DOI: 10.1364/boe.7.003979] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 08/31/2016] [Accepted: 09/06/2016] [Indexed: 05/18/2023]
Abstract
The non-invasive measurement of blood oxygen saturation in blood vessels is a promising clinical application of optoacoustic imaging. Nevertheless, precise optoacoustic measurements of blood oxygen saturation are limited because of the complexities of calculating the spatial distribution of the optical fluence. In the paper error in the determination of blood oxygen saturation, associated with the use of approximate methods of optical fluence evaluation within the blood vessel, was investigated for optoacoustic measurements at two wavelengths. The method takes into account both acoustic pressure noise and the error in determined values of the optical scattering and absorption coefficients used for the calculation of the fluence. It is shown that, in conditions of an unknown (or partially known) spatial distribution of fluence at depths of 2 to 8 mm, minimal error in the determination of blood oxygen saturation is achieved at wavelengths of 658 ± 40 nm and 1069 ± 40 nm.
Collapse
Affiliation(s)
- Valeriya Perekatova
- Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanov Street, Nizhny Novgorod 603950, Russia
| | - Pavel Subochev
- Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanov Street, Nizhny Novgorod 603950, Russia
| | - Mikhail Kleshnin
- Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanov Street, Nizhny Novgorod 603950, Russia
| | - Ilya Turchin
- Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanov Street, Nizhny Novgorod 603950, Russia
| |
Collapse
|
25
|
Wang Y, Strohm EM, Sun Y, Wang Z, Zheng Y, Wang Z, Kolios MC. Biodegradable polymeric nanoparticles containing gold nanoparticles and Paclitaxel for cancer imaging and drug delivery using photoacoustic methods. Biomed Opt Express 2016; 7:4125-4138. [PMID: 27867720 PMCID: PMC5102552 DOI: 10.1364/boe.7.004125] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 09/08/2016] [Accepted: 09/13/2016] [Indexed: 05/20/2023]
Abstract
In this study, optical-triggered multifunctional theranostic agents for photoacoustic/fluorescent imaging and cancer therapy have been developed. This system consists of a perfluorohexane liquid and gold nanoparticles (GNPs) in the core, stabilized by a Poly (lactide-co-glycolic acid) (PLGA) polymer shell. When cancer cells containing PLGA-GNPs were exposed to laser pulses, cell viability decreased due to the vaporization of the particles in and around the cells. The particle chemo drug loading and delivery capacity was also investigated in vitro experiments. These particles show potential as photoacoustic imaging and therapy agents for future clinical translation in cancer therapy.
Collapse
Affiliation(s)
- Yanjie Wang
- Physics Department, Ryerson University, 350 Victoria St., Toronto, Ontario M5B 2K3, Canada
- Institute for Biomedical Engineering, Science and Technology (iBEST), a partnership between Ryerson University and St. Michael’s Hospital, 30 Bond St., Toronto, Ontario, M5B 1T8, Canada
- Keenan Research Centre for Biomedical Science of St. Michael’s Hospital, 30 Bond St., Toronto, Ontario, M5B 1T8, Canada
| | - Eric M. Strohm
- Physics Department, Ryerson University, 350 Victoria St., Toronto, Ontario M5B 2K3, Canada
- Institute for Biomedical Engineering, Science and Technology (iBEST), a partnership between Ryerson University and St. Michael’s Hospital, 30 Bond St., Toronto, Ontario, M5B 1T8, Canada
- Keenan Research Centre for Biomedical Science of St. Michael’s Hospital, 30 Bond St., Toronto, Ontario, M5B 1T8, Canada
| | - Yang Sun
- Institute of Ultrasound Imaging, Second Affiliated Hospital, Chongqing Medical University, 76 Linjiang Rd., Chongqing, 400010, China
| | - Zhaoxia Wang
- Department of Ultrasound, Children’s Hospital, Affiliated to Chongqing Medical University, No.136, Zhongshan No.2 Rd., Yuzhong District, Chongqing 400014, China
| | - Yuanyi Zheng
- Ultrasound Department, Sixth affiliated hospital of Shanghai Jiaotong University, 600 Yishan Rd., Xuhui District, Shanghai, 200133, China
| | - Zhigang Wang
- Institute of Ultrasound Imaging, Second Affiliated Hospital, Chongqing Medical University, 76 Linjiang Rd., Chongqing, 400010, China
| | - Michael C. Kolios
- Physics Department, Ryerson University, 350 Victoria St., Toronto, Ontario M5B 2K3, Canada
- Institute for Biomedical Engineering, Science and Technology (iBEST), a partnership between Ryerson University and St. Michael’s Hospital, 30 Bond St., Toronto, Ontario, M5B 1T8, Canada
- Keenan Research Centre for Biomedical Science of St. Michael’s Hospital, 30 Bond St., Toronto, Ontario, M5B 1T8, Canada
| |
Collapse
|
26
|
Liu M, Chen Z, Zabihian B, Sinz C, Zhang E, Beard PC, Ginner L, Hoover E, Minneman MP, Leitgeb RA, Kittler H, Drexler W. Combined multi-modal photoacoustic tomography, optical coherence tomography (OCT) and OCT angiography system with an articulated probe for in vivo human skin structure and vasculature imaging. Biomed Opt Express 2016; 7:3390-3402. [PMID: 27699106 PMCID: PMC5030018 DOI: 10.1364/boe.7.003390] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 07/28/2016] [Accepted: 08/09/2016] [Indexed: 05/05/2023]
Abstract
Cutaneous blood flow accounts for approximately 5% of cardiac output in human and plays a key role in a number of a physiological and pathological processes. We show for the first time a multi-modal photoacoustic tomography (PAT), optical coherence tomography (OCT) and OCT angiography system with an articulated probe to extract human cutaneous vasculature in vivo in various skin regions. OCT angiography supplements the microvasculature which PAT alone is unable to provide. Co-registered volumes for vessel network is further embedded in the morphologic image provided by OCT. This multi-modal system is therefore demonstrated as a valuable tool for comprehensive non-invasive human skin vasculature and morphology imaging in vivo.
Collapse
Affiliation(s)
- Mengyang Liu
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, AKH 4L, Vienna, 1090, Austria
| | - Zhe Chen
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, AKH 4L, Vienna, 1090, Austria
| | - Behrooz Zabihian
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, AKH 4L, Vienna, 1090, Austria
| | - Christoph Sinz
- Department of Dermatology, Medical University of Vienna, Währinger Gürtel 18-20, AKH 7J, Vienna, 1090, Austria
| | - Edward Zhang
- Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, London, WC1E 6BT, UK
| | - Paul C. Beard
- Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, London, WC1E 6BT, UK
| | - Laurin Ginner
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, AKH 4L, Vienna, 1090, Austria
| | - Erich Hoover
- INSIGHT Photonic Solutions, Inc., 300 S. Public Road, Lafayette, CO, 80026, USA
| | - Micheal P. Minneman
- INSIGHT Photonic Solutions, Inc., 300 S. Public Road, Lafayette, CO, 80026, USA
| | - Rainer A. Leitgeb
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, AKH 4L, Vienna, 1090, Austria
| | - Harald Kittler
- Department of Dermatology, Medical University of Vienna, Währinger Gürtel 18-20, AKH 7J, Vienna, 1090, Austria
| | - Wolfgang Drexler
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, AKH 4L, Vienna, 1090, Austria
| |
Collapse
|
27
|
Huang N, Guo H, Qi W, Zhang Z, Rong J, Yuan Z, Ge W, Jiang H, Xi L. Whole-body multispectral photoacoustic imaging of adult zebrafish. Biomed Opt Express 2016; 7:3543-3550. [PMID: 27699119 PMCID: PMC5030031 DOI: 10.1364/boe.7.003543] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 07/27/2016] [Accepted: 08/12/2016] [Indexed: 05/19/2023]
Abstract
The zebrafish, an ideal vertebrate for studying developmental biology and genetics, is increasingly being used to understand human diseases, due to its high similarity to the human genome and its optical transparency during embryonic stages. Once the zebrafish has fully developed, especially wild-type breeds, conventional optical imaging techniques have difficulty in imaging the internal organs and structures with sufficient resolution and penetration depth. Even with established mutant lines that remain transparent throughout their life cycle, it is still challenging for purely optical imaging modalities to visualize the organs of juvenile and adult zebrafish at a micro-scale spatial resolution. In this work, we developed a non-invasive three-dimensional photoacoustic imaging platform with an optimized illumination pattern and a cylindrical-scanning-based data collection system to image entire zebrafish with micro-scale resolutions of 80 μm and 600 μm in the lateral and axial directions, respectively. In addition, we employed a multispectral strategy that utilized excitation wavelengths from 690 nm to 930 nm to statistically quantify the relative optical absorption spectrum of major organs.
Collapse
Affiliation(s)
- Na Huang
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
- These authors contributed equally to this work
| | - Heng Guo
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
- These authors contributed equally to this work
| | - Weizhi Qi
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
- These authors contributed equally to this work
| | - Zhiwei Zhang
- Faculty of Health Sciences, University of Macau, Macau, China
| | - Jian Rong
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
- Center for Information in Biomedicine, University of Electronic Science and Technology of China, Sichuan, China
| | - Zhen Yuan
- Faculty of Health Sciences, University of Macau, Macau, China
| | - Wei Ge
- Faculty of Health Sciences, University of Macau, Macau, China
| | - Huabei Jiang
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
- Center for Information in Biomedicine, University of Electronic Science and Technology of China, Sichuan, China
| | - Lei Xi
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
- Center for Information in Biomedicine, University of Electronic Science and Technology of China, Sichuan, China
| |
Collapse
|
28
|
Zhang HK, Bell MAL, Guo X, Kang HJ, Boctor EM. Synthetic-aperture based photoacoustic re-beamforming (SPARE) approach using beamformed ultrasound data. Biomed Opt Express 2016; 7:3056-68. [PMID: 27570697 PMCID: PMC4986813 DOI: 10.1364/boe.7.003056] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 06/17/2016] [Accepted: 06/29/2016] [Indexed: 05/11/2023]
Abstract
Photoacoustic (PA) imaging has been developed for various clinical and pre-clinical applications, and acquiring pre-beamformed channel data is necessary to reconstruct these images. However, accessing these pre-beamformed channel data requires custom hardware to enable parallel beamforming, and is available for a limited number of research ultrasound platforms. To broaden the impact of clinical PA imaging, our goal is to devise a new PA reconstruction approach that uses ultrasound post-beamformed radio frequency (RF) data rather than raw channel data, because this type of data is readily available in both clinical and research ultrasound systems. In our proposed Synthetic-aperture based photoacoustic re-beamforming (SPARE) approach, post-beamformed RF data from a clinical ultrasound scanner are considered as input data for an adaptive synthetic aperture beamforming algorithm. When receive focusing is applied prior to obtaining these data, the focal point is considered as a virtual element, and synthetic aperture beamforming is implemented assuming that the photoacoustic signals are received at the virtual element. The resolution and SNR obtained with the proposed method were compared to that obtained with conventional delay-and-sum beamforming with 99.87% and 91.56% agreement, respectively. In addition, we experimentally demonstrated feasibility with a pulsed laser diode setup. Results indicate that the post-beamformed RF data from any commercially available ultrasound platform can potentially be used to create PA images.
Collapse
Affiliation(s)
- Haichong K Zhang
- Department of Computer Science, The Johns Hopkins University, Baltimore, Maryland, 21218, USA;
| | - Muyinatu A Lediju Bell
- Department of Computer Science, The Johns Hopkins University, Baltimore, Maryland, 21218, USA; Department of Electrical and Computer Engineering, The Johns Hopkins University, Baltimore, Maryland, 21218, USA
| | - Xiaoyu Guo
- Department of Electrical and Computer Engineering, The Johns Hopkins University, Baltimore, Maryland, 21218, USA
| | - Hyun Jae Kang
- Department of Computer Science, The Johns Hopkins University, Baltimore, Maryland, 21218, USA
| | - Emad M Boctor
- Department of Computer Science, The Johns Hopkins University, Baltimore, Maryland, 21218, USA; Department of Electrical and Computer Engineering, The Johns Hopkins University, Baltimore, Maryland, 21218, USA; Department of Radiology, The Johns Hopkins Medical Institue, Baltimore, Maryland, 21213, USA;
| |
Collapse
|
29
|
Singh MKA, Jaeger M, Frenz M, Steenbergen W. In vivo demonstration of reflection artifact reduction in photoacoustic imaging using synthetic aperture photoacoustic-guided focused ultrasound (PAFUSion). Biomed Opt Express 2016; 7:2955-72. [PMID: 27570690 PMCID: PMC4986806 DOI: 10.1364/boe.7.002955] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 07/05/2016] [Accepted: 07/06/2016] [Indexed: 05/07/2023]
Abstract
Reflection artifacts caused by acoustic inhomogeneities are a critical problem in epi-mode biomedical photoacoustic imaging. High light fluence beneath the probe results in photoacoustic transients, which propagate into the tissue and reflect back from echogenic structures. These reflection artifacts cause problems in image interpretation and significantly impact the contrast and imaging depth. We recently proposed a method called PAFUSion (Photoacoustic-guided focused ultrasound) to identify such reflection artifacts in photoacoustic imaging. In its initial version, PAFUSion mimics the inward-travelling wavefield from small blood vessel-like PA sources by applying ultrasound pulses focused towards these sources, and thus provides a way to identify the resulting reflection artifacts. In this work, we demonstrate reduction of reflection artifacts in phantoms and in vivo measurements on human volunteers. In view of the spatially distributed PA sources that are found in clinical applications, we implemented an improved version of PAFUSion where photoacoustic signals are backpropagated to imitate the inward travelling wavefield and thus the reflection artifacts. The backpropagation is performed in a synthetic way based on the pulse-echo acquisitions after transmission on each single element of the transducer array. The results provide a direct confirmation that reflection artifacts are prominent in clinical epi-photoacoustic imaging, and that PAFUSion can strongly reduce these artifacts to improve deep-tissue photoacoustic imaging.
Collapse
Affiliation(s)
- Mithun Kuniyil Ajith Singh
- Biomedical Photonic Imaging Group, MIRA institute for Biomedical Technology and Technical Medicine, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Michael Jaeger
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
| | - Martin Frenz
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
| | - Wiendelt Steenbergen
- Biomedical Photonic Imaging Group, MIRA institute for Biomedical Technology and Technical Medicine, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| |
Collapse
|
30
|
Langer G, Buchegger B, Jacak J, Klar TA, Berer T. Frequency domain photoacoustic and fluorescence microscopy. Biomed Opt Express 2016; 7:2692-702. [PMID: 27446698 PMCID: PMC4948622 DOI: 10.1364/boe.7.002692] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 05/25/2016] [Accepted: 06/10/2016] [Indexed: 05/20/2023]
Abstract
We report on simultaneous frequency domain optical-resolution photoacoustic and fluorescence microscopy with sub-µm lateral resolution. With the help of a blood smear, we show that photoacoustic and fluorescence images provide complementary information. Furthermore, we compare theoretically predicted signal-to-noise ratios of sinusoidal modulation in frequency domain with pulsed excitation in time domain.
Collapse
Affiliation(s)
- Gregor Langer
- Research Center for Non-Destructive Testing GmbH, Altenberger Straße 69, 4040 Linz, Austria
| | - Bianca Buchegger
- Institute for Applied Physics, Johannes Kepler University Linz, Altenberger Straße 69, 4040 Linz, Austria
| | - Jaroslaw Jacak
- Institute for Applied Physics, Johannes Kepler University Linz, Altenberger Straße 69, 4040 Linz, Austria
- University of Applied Sciences Upper Austria, Applied Health & Social Sciences, Garnisonstraße 21, 4020 Linz, Austria
| | - Thomas A. Klar
- Institute for Applied Physics, Johannes Kepler University Linz, Altenberger Straße 69, 4040 Linz, Austria
| | - Thomas Berer
- Research Center for Non-Destructive Testing GmbH, Altenberger Straße 69, 4040 Linz, Austria
| |
Collapse
|
31
|
Brunker J, Beard P. Velocity measurements in whole blood using acoustic resolution photoacoustic Doppler. Biomed Opt Express 2016; 7:2789-806. [PMID: 27446707 PMCID: PMC4948631 DOI: 10.1364/boe.7.002789] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 05/13/2016] [Accepted: 05/15/2016] [Indexed: 05/21/2023]
Abstract
Acoustic resolution photoacoustic Doppler velocimetry promises to overcome the spatial resolution and depth penetration limitations of current blood flow measuring methods. Despite successful implementation using blood-mimicking fluids, measurements in blood have proved challenging, thus preventing in vivo application. A common explanation for this difficulty is that whole blood is insufficiently heterogeneous relative to detector frequencies of tens of MHz compatible with deep tissue photoacoustic measurements. Through rigorous experimental measurements we provide new insight that refutes this assertion. We show for the first time that, by careful choice of the detector frequency and field-of-view, and by employing novel signal processing methods, it is possible to make velocity measurements in whole blood using transducers with frequencies in the tens of MHz range. These findings have important implications for the prospects of making deep tissue measurements of blood flow relevant to the study of microcirculatory abnormalities associated with cancer, diabetes, atherosclerosis and other conditions.
Collapse
Affiliation(s)
- Joanna Brunker
- Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, London, WC1E 6BT, UK;
| | - Paul Beard
- Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, London, WC1E 6BT, UK;
| |
Collapse
|
32
|
Lei H, Johnson LA, Liu S, Moons DS, Ma T, Zhou Q, Rice MD, Ni J, Wang X, Higgins PDR, Xu G. Characterizing intestinal inflammation and fibrosis in Crohn's disease by photoacoustic imaging: feasibility study. Biomed Opt Express 2016; 7:2837-48. [PMID: 27446710 PMCID: PMC4948634 DOI: 10.1364/boe.7.002837] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 06/20/2016] [Accepted: 06/20/2016] [Indexed: 05/05/2023]
Abstract
The pathology of Crohn's disease (CD) is characterized by obstructing intestinal strictures because of inflammation (with high levels of hemoglobin), fibrosis (high levels of collagen), or a combination of both. The accurate characterization of the strictures is critical for the management of CD. This study examines the feasibility of characterizing intestinal strictures by Photoacoustic imaging (PAI) without extrapolation from superficial biopsies. Ex vivo normal rat colon tissue, inflammatory and fibrotic intestinal strictures in rat trinitrobenzene sulfonic acid (TNBS) model were first differentiated by a PA-US parallel imaging system. Surgically removed human intestinal stricture specimens were afterwards imaged by a multiwavelength acoustic resolution PA microscope (ARPAM). The experiment results suggest that PAI is a potential tool for the diagnosis of the diseased conditions in intestinal strictures.
Collapse
Affiliation(s)
- Hao Lei
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Laura A. Johnson
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Shengchun Liu
- College of Physical Science and Technology, Heilongjiang University, Harbin, 150080, China
- Department of Biomedical Engineering, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - David S. Moons
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Teng Ma
- Department of Biomedical Engineering, NIH Ultrasonic Transducer Resource Center, University of Southern California, Los Angeles, CA 90089, USA
| | - Qifa Zhou
- Department of Biomedical Engineering, NIH Ultrasonic Transducer Resource Center, University of Southern California, Los Angeles, CA 90089, USA
| | - Michael D. Rice
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Jun Ni
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Xueding Wang
- Department of Biomedical Engineering, University of Michigan Medical School, Ann Arbor, MI 48109, USA
- Department of Radiology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Peter D. R. Higgins
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Guan Xu
- Department of Radiology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| |
Collapse
|
33
|
Xu D, Yang S, Wang Y, Gu Y, Xing D. Noninvasive and high-resolving photoacoustic dermoscopy of human skin. Biomed Opt Express 2016; 7:2095-102. [PMID: 27375929 PMCID: PMC4918567 DOI: 10.1364/boe.7.002095] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 04/28/2016] [Accepted: 05/02/2016] [Indexed: 05/21/2023]
Abstract
We proposed and developed a photoacoustic (PA) dermoscope equipped with an integrated PA probe to achieve quantification and high-resolution, high-contrast deep imaging of human skin. The PA probe, with light-sound confocal excitation and reception, is specially designed, and integrated with an objective lens, an ultrasound transducer, and an inverted-triangle coupling cup to facilitate convenient implementation in a clinical setting. The PA dermoscope was utilized for noninvasive and high-resolution imaging of epidermal and dermal structure in volunteers. The imaging results demonstrated that the characteristic parameters of skin disease, including pigment distribution and thickness, vascular diameter, and depth, can be obtained by the PA dermoscope, confirming that PA dermoscopy can serve as a potential tool for the diagnosis and curative effect evaluation of human skin disease.
Collapse
Affiliation(s)
- Dong Xu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Sihua Yang
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Ying Wang
- Department of Laser Medicine, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - Ying Gu
- Department of Laser Medicine, Chinese People's Liberation Army General Hospital, Beijing 100853, China;
| | - Da Xing
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China;
| |
Collapse
|
34
|
Zhang M, Kim HS, Jin T, Yi A, Moon WK. Ultrasound-guided photoacoustic imaging for the selective detection of EGFR-expressing breast cancer and lymph node metastases. Biomed Opt Express 2016; 7:1920-31. [PMID: 27231631 PMCID: PMC4871091 DOI: 10.1364/boe.7.001920] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 04/10/2016] [Accepted: 04/12/2016] [Indexed: 05/21/2023]
Abstract
We assessed the use of ultrasound (US)-guided photoacoustic imaging (PAI) and anti-EGFR antibody-conjugated gold nanorods (anti-EGFR-GNs) to non-invasively detect EGFR-expressing primary tumor masses and regional lymph node (LN) metastases in breast tumor mice generated by injecting MCF-7 (EGFR-negative) or MDA-MB-231 (EGFR-positive) human breast cells using a preclinical Vevo 2100 LAZR Imaging system. Anti-EGFR-GNs provided a significant enhancement in the PA signal in MDA-MB-231 tumor and the axillary LN metastases relative to MCF-7 tumor and non-LN metastases. We demonstrated that US-guided PAI using anti-EGFR-GNs is highly sensitive for the selective visualization of EGFR-expressing breast primary tumors as well as LN micrometastases.
Collapse
Affiliation(s)
- Meihua Zhang
- Department of Science and Radiology, College of Medicine, Seoul National University, 103 Daehak-ro, Jongno-gu, Seoul 03080, South Korea; Contributed equally
| | - Hoe Suk Kim
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul 03080, South Korea; Contributed equally
| | - Tiefeng Jin
- Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul 03080, South Korea
| | - Ann Yi
- Seoul National University Hospital HealthCare System Gangnam Center, 152 Teheran-ro, Gangnam-gu, Seoul 06236, South Korea;
| | - Woo Kyung Moon
- Department of Science and Radiology, College of Medicine, Seoul National University, 103 Daehak-ro, Jongno-gu, Seoul 03080, South Korea; Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul 03080, South Korea;
| |
Collapse
|
35
|
Shi Y, Peng D, Wang K, Chai X, Ren Q, Tian J, Zhou C. Targeted Aucore-Agshell nanorods as a dual-functional contrast agent for photoacoustic imaging and photothermal therapy. Biomed Opt Express 2016; 7:1830-41. [PMID: 27231624 PMCID: PMC4871084 DOI: 10.1364/boe.7.001830] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 03/19/2016] [Accepted: 04/07/2016] [Indexed: 05/07/2023]
Abstract
Optimizing contrast enhancement is essential for producing specific signals in biomedical imaging and therapy. The potential of using Aucore-Agshell nanorods (Au@Ag NRs) as a dual-functional theranostic contrast agent is demonstrated for effective cancer imaging and treatments. Due to its strong NIR absorption and high efficiency of photothermal conversion, effects of both photoacoustic tomography (PAT) and photothermal therapy (PTT) are enhanced significantly. The PAT signal grows by 45.3% and 82% in the phantom and in vivo experiments, respectively, when compared to those using Au NRs. In PTT, The maximum increase of tissue temperature treated with Au@Ag NRs is 22.8 °C, twice that with Au NRs. Results of the current study show the feasibility of using Au@Ag NRs for synergetic PAT with PTT. And it will enhance the potential application on real-time PAT guided PTT, which will greatly benefit the customized PTT treatment of cancer.
Collapse
Affiliation(s)
- Yiwen Shi
- Department of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
- These authors contributed equally to this work
| | - Dong Peng
- School of Life Science and Technology, Xidian University, Xi’an, 710071, China
- Key laboratory of Molecular Imaging, Institute of Automation, Chinese Academy of Sciences, Beijing, 100190, China
- These authors contributed equally to this work
| | - Kun Wang
- Key laboratory of Molecular Imaging, Institute of Automation, Chinese Academy of Sciences, Beijing, 100190, China
| | - Xinyu Chai
- Department of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Qiushi Ren
- Department of Biomedical Engineering, College of Engineering, Peking University, Beijing, 100871, China
| | - Jie Tian
- School of Life Science and Technology, Xidian University, Xi’an, 710071, China
- Key laboratory of Molecular Imaging, Institute of Automation, Chinese Academy of Sciences, Beijing, 100190, China
| | - Chuanqing Zhou
- Department of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| |
Collapse
|
36
|
Cai D, Li Z, Chen SL. In vivo deconvolution acoustic-resolution photoacoustic microscopy in three dimensions. Biomed Opt Express 2016; 7:369-80. [PMID: 26977346 PMCID: PMC4771455 DOI: 10.1364/boe.7.000369] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 12/12/2015] [Accepted: 01/03/2016] [Indexed: 05/12/2023]
Abstract
Acoustic-resolution photoacoustic microscopy (ARPAM) provides a spatial resolution on the order of tens of micrometers, and is becoming an essential tool for imaging fine structures, such as the subcutaneous microvasculature. High lateral resolution of ARPAM is achieved using high numerical aperture (NA) of acoustic transducer; however, the depth of focus and working distance will be deteriorated correspondingly, thus sacrificing the imaging range and accessible depth. The axial resolution of ARPAM is limited by the transducer's bandwidth. In this work, we develop deconvolution ARPAM (D-ARPAM) in three dimensions that can improve the lateral resolution by 1.8 and 3.7 times and the axial resolution by 1.7 and 2.7 times, depending on the adopted criteria, using a 20-MHz focused transducer without physically increasing its NA and bandwidth. The resolution enhancement in three dimensions by D-ARPAM is also demonstrated by in vivo imaging of the microvasculature of a chick embryo. The proposed D-ARPAM has potential for biomedical imaging that simultaneously requires high spatial resolution, extended imaging range, and long accessible depth.
Collapse
|
37
|
Kang H, Lee SW, Lee ES, Kim SH, Lee TG. Real-time GPU-accelerated processing and volumetric display for wide-field laser-scanning optical-resolution photoacoustic microscopy. Biomed Opt Express 2015; 6:4650-60. [PMID: 26713184 PMCID: PMC4679244 DOI: 10.1364/boe.6.004650] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 10/26/2015] [Accepted: 10/29/2015] [Indexed: 05/02/2023]
Abstract
Fast signal processing and real-time displays are essential for practical imaging modality in various fields of applications. However, the imaging speed in optical-resolution photoacoustic microscopy (OR-PAM), in particular, depends on factors such as the pulse repetition rate of the laser, scanning method, field of view (FOV), and signal processing time. In the past, efforts to increase acquisition speed either focused on developing new scanning methods or using lasers with higher pulse repetition rates. However, high-speed signal processing is also important for real-time volumetric display in OR-PAM. In this study, we carried out parallel signal processing using a graphics processing unit (GPU) to enable fast signal processing and wide-field real-time displays in laser-scanning OR-PAM. The average total GPU processing time for a B-mode PAM image was approximately 1.35 ms at a display speed of 480 fps when the data samples were acquired with 736 (axial) × 500 (lateral) points/B-mode-frame at a pulse repetition rate of 300 kHz. In addition, we successfully displayed maximum amplitude projection images of a mouse's ear as volumetric images with an FOV of 3 mm × 3 mm (500 × 500 pixels) at 1.02 s, corresponding to 0.98 fps.
Collapse
Affiliation(s)
- Heesung Kang
- Center for Nano-Bio Measurement, Korea Research Institute of Standards and Science, Daejoen 305-340, South Korea ; contributed equally
| | - Sang-Won Lee
- Center for Nano-Bio Measurement, Korea Research Institute of Standards and Science, Daejoen 305-340, South Korea ; Center for Nanosafety Metrology, Korea Research Institute of Standards and Science, Daejeon 305-340, South Korea ; Department of Nano Science, University of Science and Technology, Daejoen 305-350, South Korea ; contributed equally ;
| | - Eun-Soo Lee
- Center for Nano-Bio Measurement, Korea Research Institute of Standards and Science, Daejoen 305-340, South Korea
| | - Se-Hwa Kim
- Center for Nano-Bio Measurement, Korea Research Institute of Standards and Science, Daejoen 305-340, South Korea ; Center for Nanosafety Metrology, Korea Research Institute of Standards and Science, Daejeon 305-340, South Korea ; Department of Nano and Bio Surface Science, University of Science and Technology, Daejeon 305-350, South Korea
| | - Tae Geol Lee
- Center for Nano-Bio Measurement, Korea Research Institute of Standards and Science, Daejoen 305-340, South Korea ; Department of Nano Science, University of Science and Technology, Daejoen 305-350, South Korea ;
| |
Collapse
|
38
|
Chen C, Zhao Y, Yang S, Xing D. Mechanical characterization of intraluminal tissue with phase-resolved photoacoustic viscoelasticity endoscopy. Biomed Opt Express 2015; 6:4975-80. [PMID: 26713209 PMCID: PMC4679269 DOI: 10.1364/boe.6.004975] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 11/11/2015] [Accepted: 11/11/2015] [Indexed: 05/24/2023]
Abstract
We developed a phase-sensitive side-scanning photoacoustic viscoelasticity endoscopy (PAVEE) for mechanical characterization of intraluminal tissues. In PAVEE, the PA phase can be extracted from the optical absorption induced ultrasonic waves and provides an index of viscoelasticity that is closely linked to tissue compositions. The transverse resolution of the PAVEE measured by carbon fiber was about 32 μm. The imaging capability of the PAVEE was verified using a vessel-mimicking phantom with different agar density. Moreover, PAVEE was investigated in processed lumen-shaped vascular tissues to evaluate the biomechanical features, which was highly consistent with the histology. The results demonstrated that the PAVEE can obtain viscoelastic properties of intraluminal tissues, which puts a new insight into the intravascular disease and holds great promise for plaque vulnerability detection.
Collapse
Affiliation(s)
- Conggui Chen
- MOE Key Laboratory of Laser Life Science and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Yue Zhao
- MOE Key Laboratory of Laser Life Science and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Sihua Yang
- MOE Key Laboratory of Laser Life Science and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China ;
| | - Da Xing
- MOE Key Laboratory of Laser Life Science and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China ;
| |
Collapse
|
39
|
Hui J, Yu Q, Ma T, Wang P, Cao Y, Bruning RS, Qu Y, Chen Z, Zhou Q, Sturek M, Cheng JX, Chen W. High-speed intravascular photoacoustic imaging at 1.7 μm with a KTP-based OPO. Biomed Opt Express 2015; 6:4557-66. [PMID: 26601018 PMCID: PMC4646562 DOI: 10.1364/boe.6.004557] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 10/18/2015] [Accepted: 10/19/2015] [Indexed: 05/03/2023]
Abstract
Lipid deposition inside the arterial wall is a hallmark of plaque vulnerability. Based on overtone absorption of C-H bonds, intravascular photoacoustic (IVPA) catheter is a promising technology for quantifying the amount of lipid and its spatial distribution inside the arterial wall. Thus far, the clinical translation of IVPA technology is limited by its slow imaging speed due to lack of a high-pulse-energy high-repetition-rate laser source for lipid-specific first overtone excitation at 1.7 μm. Here, we demonstrate a potassium titanyl phosphate (KTP)-based optical parametric oscillator with output pulse energy up to 2 mJ at a wavelength of 1724 nm and with a repetition rate of 500 Hz. Using this laser and a ring-shape transducer, IVPA imaging at speed of 1 frame per sec was demonstrated. Performance of the IVPA imaging system's resolution, sensitivity, and specificity were characterized by carbon fiber and a lipid-mimicking phantom. The clinical utility of this technology was further evaluated ex vivo in an excised atherosclerotic human femoral artery with comparison to histology.
Collapse
Affiliation(s)
- Jie Hui
- Department of Physics and Astronomy, Purdue University, West Lafayette, IN, 47906, USA ; These authors contributed equally to this work
| | - Qianhuan Yu
- Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China ; University of Chinese Academy of Science, Beijing 100049, China ; These authors contributed equally to this work
| | - Teng Ma
- Department of Biomedical Engineering, NIH Ultrasonic Transducer Resource Center, University of Southern California, Los Angeles, CA, 90089, USA ; These authors contributed equally to this work
| | - Pu Wang
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47906, USA
| | - Yingchun Cao
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47906, USA
| | - Rebecca S Bruning
- Department of Cellular & Integrative Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Yueqiao Qu
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, 92612, USA
| | - Zhongping Chen
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, 92612, USA
| | - Qifa Zhou
- Department of Biomedical Engineering, NIH Ultrasonic Transducer Resource Center, University of Southern California, Los Angeles, CA, 90089, USA
| | - Michael Sturek
- Department of Cellular & Integrative Physiology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Ji-Xin Cheng
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47906, USA ;
| | - Weibiao Chen
- Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China ;
| |
Collapse
|
40
|
Upputuri PK, Pramanik M. Performance characterization of low-cost, high-speed, portable pulsed laser diode photoacoustic tomography (PLD-PAT) system. Biomed Opt Express 2015; 6:4118-29. [PMID: 26504659 PMCID: PMC4605068 DOI: 10.1364/boe.6.004118] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 09/17/2015] [Accepted: 09/18/2015] [Indexed: 05/04/2023]
Abstract
Photoacoustic tomography systems that uses Q-switched Nd:YAG/OPO pulsed lasers are expensive, bulky, and hence limits its use in clinical applications. The low pulse repetition rate of these lasers makes it unsuitable for real-time imaging when used with single-element ultrasound detector. In this work, we present a pulsed laser diode photoacoustic tomography (PLD-PAT) system that integrates a compact PLD inside a single-detector circular scanning geometry. We compared its performance against the traditional Nd:YAG/OPO based PAT system in terms of imaging depth, resolution, imaging time etc. The PLD provides near-infrared pulses at ~803 nm wavelength with pulse energy ~1.4 mJ/pulse at 7 kHz repetition rate. The PLD-PAT system is capable of providing 2D image in scan time as small as 3 sec with a signal-to-noise ratio ~30. High-speed and deep-tissue imaging is demonstrated on phantoms and biological samples. The PLD-PAT system is inexpensive, portable, allows high-speed PAT imaging, and its performance is as good as traditional expensive OPO based PAT system. Therefore, it holds promises for future translational biomedical imaging applications.
Collapse
|
41
|
Rich LJ, Seshadri M. Photoacoustic imaging of salivary glands. Biomed Opt Express 2015; 6:3157-3162. [PMID: 26417488 PMCID: PMC4574644 DOI: 10.1364/boe.6.003157] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 07/24/2015] [Accepted: 07/28/2015] [Indexed: 06/05/2023]
Abstract
In this work, we utilized photoacoustic imaging (PAI) with co-registered ultrasound (US) to non-invasively assess salivary gland function in vivo. A significant increase in salivary gland oxygen saturation was observed on PAI within minutes after gustatory stimulation of healthy mice reflective of the hyperemic response associated with secretion of saliva. Good correlation was seen between PAI and Doppler sonography. Salivary adenoid cystic carcinomas showed higher oxygen saturation compared to surrounding salivary gland tissue. Our results demonstrate the potential clinical utility of PAI for visualization of salivary gland physiology and pathology.
Collapse
Affiliation(s)
- Laurie J. Rich
- Laboratory for Translational Imaging, Department of Molecular and Cellular Biophysics and Biochemistry, Roswell Park Cancer Institute, Buffalo, New York 14263, USA
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Buffalo, New York 14263, USA
| | - Mukund Seshadri
- Laboratory for Translational Imaging, Department of Molecular and Cellular Biophysics and Biochemistry, Roswell Park Cancer Institute, Buffalo, New York 14263, USA
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Buffalo, New York 14263, USA
- Department of Head and Neck Surgery, Roswell Park Cancer Institute, Buffalo, New York 14263, USA
| |
Collapse
|
42
|
Chen BZ, Yang JG, Wu D, Zeng DW, Yi Y, Yang N, Jiang HB. Photoacoustic imaging of cerebral hypoperfusion during acupuncture. Biomed Opt Express 2015; 6:3225-34. [PMID: 26417495 PMCID: PMC4574651 DOI: 10.1364/boe.6.003225] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 07/18/2015] [Accepted: 07/27/2015] [Indexed: 05/04/2023]
Abstract
Using acupuncture to treat cerebral hypoperfusion is a hot topic. However, there is a lack of effective tools to clarify the therapeutic effect of acupuncture on cerebral hypoperfusion. Here, we show in a mouse model of cerebral hypoperfusion that photoacoustic tomography (PAT) can noninvasively image cerebral vasculature and track total hemoglobin (HbT) concentration changes in cerebral hypoperfusion with acupuncture stimulation on the YangLingQuan (GB34) point. We measured the changes of HbT concentration and found that the HbT concentration in hypoperfusion regions was clearly lower than that in the control regions when the acupuncture was absent; however, it was significantly increased when the acupuncture was implemented on the GB34 point. We also observed the increase of vessel size and the generation of new vessels in cerebral hypoperfusion during acupuncture. Laser speckle imaging (LSI) was employed to validate some of the PAT findings.
Collapse
Affiliation(s)
- B. Z. Chen
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - J. G. Yang
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - D. Wu
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - D. W. Zeng
- Institute of Laboratory Animals of Sichuan Academy of Medical Sciences and Sichuan Province People’s Hospital, Chengdu, 610054, China
| | - Y. Yi
- Institute of Laboratory Animals of Sichuan Academy of Medical Sciences and Sichuan Province People’s Hospital, Chengdu, 610054, China
| | - N. Yang
- Institute of Laboratory Animals of Sichuan Academy of Medical Sciences and Sichuan Province People’s Hospital, Chengdu, 610054, China
| | - H. B. Jiang
- School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, 610054, China
- Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
| |
Collapse
|
43
|
Zabihian B, Weingast J, Liu M, Zhang E, Beard P, Pehamberger H, Drexler W, Hermann B. In vivo dual-modality photoacoustic and optical coherence tomography imaging of human dermatological pathologies. Biomed Opt Express 2015; 6:3163-78. [PMID: 26417489 PMCID: PMC4574645 DOI: 10.1364/boe.6.003163] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 07/09/2015] [Accepted: 07/21/2015] [Indexed: 05/18/2023]
Abstract
Vascular abnormalities serve as a key indicator for many skin diseases. Currently available methods in dermatology such as histopathology and dermatoscopy analyze underlying vasculature in human skin but are either invasive, time-consuming, and laborious or incapable of providing 3D images. In this work, we applied for the first time dual-modality photoacoustic and optical coherence tomography that provides complementary information about tissue morphology and vasculature of patients with different types of dermatitis. Its noninvasiveness and relatively short imaging time and the wide range of diseases that it can detect prove the merits of the dual-modality imaging system and show the great potential of its clinical use in the future.
Collapse
Affiliation(s)
- Behrooz Zabihian
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, AKH 4L, Währinger Gürtel 18-20, Vienna 1090, Austria
| | - Jessika Weingast
- Department of Dermatology, Medical University of Vienna, Währinger Gürtel 18-20, Vienna 1090, Austria
| | - Mengyang Liu
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, AKH 4L, Währinger Gürtel 18-20, Vienna 1090, Austria
| | - Edward Zhang
- Department of Medical Physics & Biomedical Engineering, University College London, Gower Street, London, UK
| | - Paul Beard
- Department of Medical Physics & Biomedical Engineering, University College London, Gower Street, London, UK
| | - Hubert Pehamberger
- Department of Dermatology, Medical University of Vienna, Währinger Gürtel 18-20, Vienna 1090, Austria
| | - Wolfgang Drexler
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, AKH 4L, Währinger Gürtel 18-20, Vienna 1090, Austria
| | - Boris Hermann
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, AKH 4L, Währinger Gürtel 18-20, Vienna 1090, Austria
| |
Collapse
|
44
|
Tian C, Xie Z, Fabiilli ML, Liu S, Wang C, Cheng Q, Wang X. Dual-pulse nonlinear photoacoustic technique: a practical investigation. Biomed Opt Express 2015; 6:2923-33. [PMID: 26309756 PMCID: PMC4541520 DOI: 10.1364/boe.6.002923] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Revised: 07/12/2015] [Accepted: 07/14/2015] [Indexed: 05/18/2023]
Abstract
The dual-pulse nonlinear photoacoustic technique is a recently developed technology based on temperature dependence of the Grüneisen parameter and involves consecutive excitations of biological tissue using two laser pulses with a short time delay. Here we review the principle of the technique and give a discussion about its technical aspects, including selection and combination of excitation laser wavelengths, determination of laser fluence, estimation of thermal relaxation function and probability of photoablation or cavitation. Comparisons between the dual-pulse technique and conventional photoacoustics as well as thermal photoacoustics are also presented. These investigations are supported by experimental results and will give a practical reference and guide for further developments of the technique.
Collapse
Affiliation(s)
- Chao Tian
- Department of Radiology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Zhixing Xie
- Department of Radiology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Mario L. Fabiilli
- Department of Radiology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Shengchun Liu
- Department of Radiology, University of Michigan, Ann Arbor, MI 48109, USA
- College of Physical Science and Technology, Heilongjiang University, Harbin, 150080, China
| | - Cheng Wang
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Qian Cheng
- Institute of Acoustics, Tongji University, Shanghai 200092, China
| | - Xueding Wang
- Department of Radiology, University of Michigan, Ann Arbor, MI 48109, USA
| |
Collapse
|
45
|
Märk J, Schmitt FJ, Theiss C, Dortay H, Friedrich T, Laufer J. Photoacoustic imaging of fluorophores using pump-probe excitation. Biomed Opt Express 2015; 6:2522-2535. [PMID: 26203378 PMCID: PMC4505706 DOI: 10.1364/boe.6.002522] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 05/18/2015] [Accepted: 05/21/2015] [Indexed: 06/08/2023]
Abstract
A pump-probe technique for the detection of fluorophores in tomographic PA images is introduced. It is based on inducing stimulated emission in fluorescent molecules, which in turn modulates the amount of thermalized energy, and hence the PA signal amplitude. A theoretical model of the PA signal generation in fluorophores is presented and experimentally validated on cuvette measurements made in solutions of Rhodamine 6G, a fluorophore of known optical and molecular properties. The application of this technique to deep tissue tomographic PA imaging is demonstrated by determining the spatial distribution of a near-infrared fluorophore in a tissue phantom.
Collapse
Affiliation(s)
- Julia Märk
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | - Franz-Josef Schmitt
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | - Christoph Theiss
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | - Hakan Dortay
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | - Thomas Friedrich
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | - Jan Laufer
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
- Institut für Radiologie, Charité – Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany
| |
Collapse
|
46
|
Li S, Montcel B, Yuan Z, Liu W, Vray D. Multigrid-based reconstruction algorithm for quantitative photoacoustic tomography. Biomed Opt Express 2015; 6:2424-2434. [PMID: 26203371 PMCID: PMC4505699 DOI: 10.1364/boe.6.002424] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 05/08/2015] [Accepted: 06/03/2015] [Indexed: 05/31/2023]
Abstract
This paper proposes a multigrid inversion framework for quantitative photoacoustic tomography reconstruction. The forward model of optical fluence distribution and the inverse problem are solved at multiple resolutions. A fixed-point iteration scheme is formulated for each resolution and used as a cost function. The simulated and experimental results for quantitative photoacoustic tomography reconstruction show that the proposed multigrid inversion can dramatically reduce the required number of iterations for the optimization process without loss of reliability in the results.
Collapse
Affiliation(s)
- Shengfu Li
- Université de Lyon, CREATIS ; CNRS UMR5220 ; Inserm U1044 ; INSA-Lyon ; Université Lyon 1, France
- HIT-INSA Sino French Research Center for Biomedical Imaging, Harbin Institute of Technology, Harbin 150001, China
| | - Bruno Montcel
- Université de Lyon, CREATIS ; CNRS UMR5220 ; Inserm U1044 ; INSA-Lyon ; Université Lyon 1, France
| | - Zhen Yuan
- Bioimaging Core, Faculty of Health Sciences, University of Macau, Av. Padre Tomás Pereira, Taipa, Macau SAR, China
| | - Wanyu Liu
- HIT-INSA Sino French Research Center for Biomedical Imaging, Harbin Institute of Technology, Harbin 150001, China
| | - Didier Vray
- Université de Lyon, CREATIS ; CNRS UMR5220 ; Inserm U1044 ; INSA-Lyon ; Université Lyon 1, France
| |
Collapse
|
47
|
Dovlo E, Lashkari B, Mandelis A, Shi W, Liu FF. Photoacoustic radar phase-filtered spatial resolution and co-registered ultrasound image enhancement for tumor detection. Biomed Opt Express 2015; 6:1003-1009. [PMID: 25798321 PMCID: PMC4361416 DOI: 10.1364/boe.6.001003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 02/09/2015] [Accepted: 02/23/2015] [Indexed: 06/04/2023]
Abstract
Co-registered ultrasound (US) and frequency-domain photoacoustic radar (FD-PAR) imaging is reported for the first time in this paper. The merits of ultrasound and cross-correlation (radar) frequency-domain photoacoustic imaging are leveraged for accurate tumor detection. Commercial US imagers possess sophisticated, optimized software for rapid image acquisition that could dramatically speed-up PA imaging. The PAR image generated from the amplitude of the cross-correlation between detected and input signals was filtered by the standard deviation (SD) of the phase of the correlation signal, resulting in strong improvement of image spatial resolution, signal-to-noise ratio (SNR) and contrast. Application of phase-mediated image improvement is illustrated by imaging a cancer cell-injected mouse. A 14-15 dB SNR gain was recorded for the phase-filtered image compared to the amplitude and phase independently, while ~340 μm spatial resolution was seen for the phase PAR image compared to ~840 μm for the amplitude image.
Collapse
Affiliation(s)
- Edem Dovlo
- Center for Advanced Diffusion-Wave Technologies (CADIFT), Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8,
Canada
| | - Bahman Lashkari
- Center for Advanced Diffusion-Wave Technologies (CADIFT), Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8,
Canada
| | - Andreas Mandelis
- Center for Advanced Diffusion-Wave Technologies (CADIFT), Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8,
Canada
| | - Wei Shi
- Ontario Cancer Institute, Princess Margaret Hospital, 610 University Ave., Toronto, ON M5G 2M9,
Canada
| | - Fei-Fei Liu
- Ontario Cancer Institute, Princess Margaret Hospital, 610 University Ave., Toronto, ON M5G 2M9,
Canada
| |
Collapse
|
48
|
Yang JM, Li C, Chen R, Rao B, Yao J, Yeh CH, Danielli A, Maslov K, Zhou Q, Shung KK, Wang LV. Optical-resolution photoacoustic endomicroscopy in vivo. Biomed Opt Express 2015; 6:918-32. [PMID: 25798315 PMCID: PMC4361445 DOI: 10.1364/boe.6.000918] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 01/26/2015] [Accepted: 01/28/2015] [Indexed: 05/03/2023]
Abstract
Optical-resolution photoacoustic microscopy (OR-PAM) has become a major experimental tool of photoacoustic tomography, with unique imaging capabilities for various biological applications. However, conventional imaging systems are all table-top embodiments, which preclude their use in internal organs. In this study, by applying the OR-PAM concept to our recently developed endoscopic technique, called photoacoustic endoscopy (PAE), we created an optical-resolution photoacoustic endomicroscopy (OR-PAEM) system, which enables internal organ imaging with a much finer resolution than conventional acoustic-resolution PAE systems. OR-PAEM has potential preclinical and clinical applications using either endogenous or exogenous contrast agents.
Collapse
Affiliation(s)
- Joon-Mo Yang
- Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University in St. Louis, Campus Box 1097, One Brookings Drive, St. Louis, Missouri 63130,
USA
- These authors contributed equally to this work
| | - Chiye Li
- Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University in St. Louis, Campus Box 1097, One Brookings Drive, St. Louis, Missouri 63130,
USA
- These authors contributed equally to this work
| | - Ruimin Chen
- NIH Ultrasonic Transducer Resource Center, Department of Biomedical Engineering, University of Southern California, 1042 Downey Way, University Park, Los Angeles, California 90089,
USA
- These authors contributed equally to this work
| | - Bin Rao
- Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University in St. Louis, Campus Box 1097, One Brookings Drive, St. Louis, Missouri 63130,
USA
| | - Junjie Yao
- Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University in St. Louis, Campus Box 1097, One Brookings Drive, St. Louis, Missouri 63130,
USA
| | - Cheng-Hung Yeh
- Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University in St. Louis, Campus Box 1097, One Brookings Drive, St. Louis, Missouri 63130,
USA
| | - Amos Danielli
- Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University in St. Louis, Campus Box 1097, One Brookings Drive, St. Louis, Missouri 63130,
USA
- Currently with the Faculty of Engineering, Bar-Ilan University, Ramat Gan 5290002,
Israel
| | - Konstantin Maslov
- Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University in St. Louis, Campus Box 1097, One Brookings Drive, St. Louis, Missouri 63130,
USA
| | - Qifa Zhou
- NIH Ultrasonic Transducer Resource Center, Department of Biomedical Engineering, University of Southern California, 1042 Downey Way, University Park, Los Angeles, California 90089,
USA
| | - K. Kirk Shung
- NIH Ultrasonic Transducer Resource Center, Department of Biomedical Engineering, University of Southern California, 1042 Downey Way, University Park, Los Angeles, California 90089,
USA
| | - Lihong V. Wang
- Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University in St. Louis, Campus Box 1097, One Brookings Drive, St. Louis, Missouri 63130,
USA
| |
Collapse
|
49
|
Attia ABE, Balasundaram G, Driessen W, Ntziachristos V, Olivo M. Phthalocyanine photosensitizers as contrast agents for in vivo photoacoustic tumor imaging. Biomed Opt Express 2015; 6:591-8. [PMID: 25780748 PMCID: PMC4354593 DOI: 10.1364/boe.6.000591] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 12/03/2014] [Accepted: 12/03/2014] [Indexed: 05/23/2023]
Abstract
There is a need for contrast agents for non-invasive diagnostic imaging of tumors. Herein, Multispectral Optoacoustic Tomography (MSOT) was employed to evaluate phthalocyanines commonly used in photodynamic therapy as photoacoustic contrast agents. We studied the photoacoustic activity of three water-soluble phthalocyanine photosensitizers: phthalocyanine tetrasulfonic acid (PcS4), Zn(II) phthalocyanine tetrasulfonic acid (ZnPcS4) and Al(III) phthalocyanine chloride tetrasulfonic acid (AlPcS4) in phantom and in tumor-bearing mice to investigate the biodistribution and fate of the phthalocyanines in the biological tissues. PcS4 was observed to grant good contrast between the different reticuloendothelial organs and accumulate in the tumor within an hour of post-administration. ZnPcS4 and AlPcS4 offered little contrast in photoacoustic signals between the organs. PcS4 is a promising photoacoustic contrast agent and can be exploited as a photodiagnostic agent.
Collapse
Affiliation(s)
- Amalina Bte Ebrahim Attia
- Bio-Optical Imaging Group, Singapore Bioimaging Consortium, Helios #01-02, 11 Biopolis Way,
Singapore
| | - Ghayathri Balasundaram
- Bio-Optical Imaging Group, Singapore Bioimaging Consortium, Helios #01-02, 11 Biopolis Way,
Singapore
| | - Wouter Driessen
- Institute for Biological and Medical Imaging, Helmholtz Zentrum Munich, Technical University Munich, Munich,
Germany
- iThera Medical, GmbH,
Germany
| | - Vasilis Ntziachristos
- Institute for Biological and Medical Imaging, Helmholtz Zentrum Munich, Technical University Munich, Munich,
Germany
- Technical University of Munich,
Germany
| | - Malini Olivo
- Bio-Optical Imaging Group, Singapore Bioimaging Consortium, Helios #01-02, 11 Biopolis Way,
Singapore
- School of Physics, National University of Ireland, Galway,
Ireland
| |
Collapse
|
50
|
Subochev P, Orlova A, Shirmanova M, Postnikova A, Turchin I. Simultaneous photoacoustic and optically mediated ultrasound microscopy: an in vivo study. Biomed Opt Express 2015; 6:631-8. [PMID: 25780752 PMCID: PMC4354594 DOI: 10.1364/boe.6.000631] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 12/09/2014] [Accepted: 12/23/2014] [Indexed: 05/18/2023]
Abstract
We propose the use of thermoelastic (TE) excitation of an ultrasonic (US) detector by backscattered laser radiation as a means of upgrading a single-modality photoacoustic (PA) microscope to dual-modality PA/US imaging at minimal cost. The upgraded scanning head of our dual-modality microscope consists of a fiber bundle with 14 output arms and a 32MHz polyvinylidene difluoride (PVDF) detector with a 34 MHz bandwidth (-6 dB level), 12.7 mm focal length, and a 0.25 numerical aperture. A single optical pulse delivered through the fiber bundle to the biotissue being investigated, in combination with a metalized surface on the PVDF detector allows us to obtain both PA and US A-scans. To demonstrate the in vivo capabilities of the proposed method we present the results of bimodal imaging of the brain of a newborn rat, a mouse tail and a mouse tumor.
Collapse
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
| | - Marina Shirmanova
- Lobachevsky State University of Nizhny Novgorod, 19 Gagarin Avenue, Nizhniy Novgorod,
Russia
- Nizhny Novgorod State Medical Academy, Nizhniy Novgorod,
Russia
| | - Anna Postnikova
- Institute of Applied Physics RAS, 46 Ulyanov Street, Nizhniy Novgorod,
Russia
| | - Ilya Turchin
- Institute of Applied Physics RAS, 46 Ulyanov Street, Nizhniy Novgorod,
Russia
| |
Collapse
|