51
|
Lavaud J, Henry M, Coll JL, Josserand V. Exploration of melanoma metastases in mice brains using endogenous contrast photoacoustic imaging. Int J Pharm 2017; 532:704-709. [PMID: 28847669 DOI: 10.1016/j.ijpharm.2017.08.104] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 08/03/2017] [Accepted: 08/21/2017] [Indexed: 12/11/2022]
Abstract
Photoacoustic imaging (PAI) provides real time non-invasive and contrast agent free monitoring of some endogenous compounds concentrations that provides improved insights into tissue vascularization and oxygenation which are particularly important during tumor progression. This study assessed the input of PAI for examination of melanoma brain metastases in an orthotopic mouse model and further focused on spatial analyses within the tumor tissue. Hemoglobin content appeared to be higher in tumors than in healthy brains. Spatial analyses further showed that angiogenesis was mainly at the tumor periphery. Concomitantly, while healthy brains were highly oxygenated, the tumors were hypoxic and subjected to a gradient of hypoxia from the periphery to the core. In tumor-bearing brains, spectroscopic PAI clearly revealed the presence of melanin, generating a signal 3 times higher than the background signal in healthy brains. When inserted into tissue mimicking phantoms, the photoacoustic signal of B16F10 melanin-containing cells was linearly correlated to their concentration and the detection limit was 625 cells. In vivo biological characterization of tumor models by non-invasive imaging of vasculature and tissue hypoxia represents an interesting opportunity for better understanding cancer progression; it is opening new research prospects to improve diagnostic, therapy, and early assessment of tumor treatment efficacy.
Collapse
Affiliation(s)
- Jonathan Lavaud
- Institute for Advanced Biosciences, University of Grenoble Alpes, INSERM U1209, CNRS UMR5309, F-38000 Grenoble, France; OPTIMAL, Small Animal Imaging Platform, F-38000 Grenoble, France
| | - Maxime Henry
- Institute for Advanced Biosciences, University of Grenoble Alpes, INSERM U1209, CNRS UMR5309, F-38000 Grenoble, France; OPTIMAL, Small Animal Imaging Platform, F-38000 Grenoble, France
| | - Jean Luc Coll
- Institute for Advanced Biosciences, University of Grenoble Alpes, INSERM U1209, CNRS UMR5309, F-38000 Grenoble, France; OPTIMAL, Small Animal Imaging Platform, F-38000 Grenoble, France
| | - Veronique Josserand
- Institute for Advanced Biosciences, University of Grenoble Alpes, INSERM U1209, CNRS UMR5309, F-38000 Grenoble, France; OPTIMAL, Small Animal Imaging Platform, F-38000 Grenoble, France.
| |
Collapse
|
52
|
Periyasamy V, Pramanik M. Advances in Monte Carlo Simulation for Light Propagation in Tissue. IEEE Rev Biomed Eng 2017; 10:122-135. [PMID: 28816674 DOI: 10.1109/rbme.2017.2739801] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Monte Carlo (MC) simulation for light propagation in tissue is the gold standard for studying the light propagation in biological tissue and has been used for years. Interaction of photons with a medium is simulated based on its optical properties. New simulation geometries, tissue-light interaction methods, and recording techniques recently have been designed. Applications, such as whole mouse body simulations for fluorescence imaging, eye modeling for blood vessel imaging, skin modeling for terahertz imaging, and human head modeling for sinus imaging, have emerged. Here, we review the technical advances and recent applications of MC simulation.
Collapse
|
53
|
Tkaczyk E. Innovations and Developments in Dermatologic Non-invasive Optical Imaging and Potential Clinical Applications. Acta Derm Venereol 2017; Suppl 218:5-13. [PMID: 28676880 PMCID: PMC5943168 DOI: 10.2340/00015555-2717] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Most dermatologists are aware of the benefits of dermoscopy, and a few are familiar with laser-scanning confocal microscopy. Beyond confocal, there are fully 11 different categories of optical techniques that have been applied to clinical dermatology. This article first provides a comprehensive tabular overview of all these optical diagnostic technologies and then details 4 of the lesser known innovations that are already available or still in development (laser Doppler and speckle imaging, Raman spectroscopy, multiphoton microscopy, photoacoustic tomography), with some potential applications in clinical dermatology (blood flow monitoring, skin cancer diagnosis, composition measurements in atopic dermatitis, skin rejuvenation measurement, and noninvasive sentinel lymph node assessment in melanoma). These methods present many advantages, being non-invasive, portable, and rapid. The development of optics in biological and biomedical sciences (i.e. biophotonics) requires not only deep insight into the applications but also synergistic collaboration between engineers and clinicians.
Collapse
Affiliation(s)
- Eric Tkaczyk
- One Hundred Oaks Suite 26300, 719 Thompson Lane, TN 37204 Nashville, USA.
| |
Collapse
|
54
|
Zhou W, Chen Z, Yang S, Xing D. Optical biopsy approach to basal cell carcinoma and melanoma based on all-optically integrated photoacoustic and optical coherence tomography. OPTICS LETTERS 2017; 42:2145-2148. [PMID: 28569867 DOI: 10.1364/ol.42.002145] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 05/09/2017] [Indexed: 05/24/2023]
Abstract
Basal cell carcinoma (BCC) and melanoma (MM), with the highest morbidity and mortality, respectively, are considered as two skin cancers of concern in dermatology. Histological studies have demonstrated that vascular patterns and collagenous stroma serve as key parameters for BCC and MM classification. In this Letter, we sought to identify BCC and MM based on the dual parameters of vascular patterns and scattering structures provided by all-optically integrated photoacoustic and optical coherence tomography (AOPA/OCT). The imaging capability of the AOPA/OCT was verified by the mimic phantoms. Furthermore, in vivo characterization of vasculatures and tissue structures from BCC and MM mice were successfully achieved with high resolution. Results prove the feasibility of AOPA/OCT as a novel method to dedicate to the in vivo biopsy of skin cancers which shows new insights into the study of skin diseases in early stages.
Collapse
|
55
|
Wong TTW, Zhou Y, Garcia-Uribe A, Li L, Maslov K, Lin L, Wang LV. Use of a single xenon flash lamp for photoacoustic computed tomography of multiple-centimeter-thick biological tissue ex vivo and a whole mouse body in vivo. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:41003. [PMID: 27775747 PMCID: PMC5075722 DOI: 10.1117/1.jbo.22.4.041003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 10/10/2016] [Indexed: 05/04/2023]
Abstract
While lasers have been commonly used as illumination sources in photoacoustic (PA) imaging, their high purchase and maintenance costs, as well as their bulkiness, have hindered the rapid clinical dissemination of PA imaging. With this in mind, we explore an alternative illumination source for PA tomography—a xenon flash lamp with high pulse energy and a microsecond pulse width. We demonstrate that, by using a single xenon flash lamp, we can image both a black latex cord placed in chicken breast tissue at a depth of up to 3.5 cm ex vivo and an entire mouse body in vivo. Our findings indicate that the xenon flash lamp, producing optical illumination that is safe for humans, can be potentially applied to human tissue imaging.
Collapse
Affiliation(s)
- Terence T. W. Wong
- Washington University in St. Louis, Optical Imaging Laboratory, Department of Biomedical Engineering, One Brookings Drive, Saint Louis, Missouri 63130, United States
| | - Yong Zhou
- Washington University in St. Louis, Optical Imaging Laboratory, Department of Biomedical Engineering, One Brookings Drive, Saint Louis, Missouri 63130, United States
| | - Alejandro Garcia-Uribe
- Washington University in St. Louis, Optical Imaging Laboratory, Department of Biomedical Engineering, One Brookings Drive, Saint Louis, Missouri 63130, United States
| | - Lei Li
- Washington University in St. Louis, Optical Imaging Laboratory, Department of Biomedical Engineering, One Brookings Drive, Saint Louis, Missouri 63130, United States
| | - Konstantin Maslov
- Washington University in St. Louis, Optical Imaging Laboratory, Department of Biomedical Engineering, One Brookings Drive, Saint Louis, Missouri 63130, United States
| | - Li Lin
- Washington University in St. Louis, Optical Imaging Laboratory, Department of Biomedical Engineering, One Brookings Drive, Saint Louis, Missouri 63130, United States
| | - Lihong V. Wang
- Washington University in St. Louis, Optical Imaging Laboratory, Department of Biomedical Engineering, One Brookings Drive, Saint Louis, Missouri 63130, United States
- Address all correspondence to: Lihong V. Wang, E-mail:
| |
Collapse
|
56
|
Noninvasive Determination of Melanoma Depth using a Handheld Photoacoustic Probe. J Invest Dermatol 2017; 137:1370-1372. [PMID: 28163070 DOI: 10.1016/j.jid.2017.01.016] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 12/29/2016] [Accepted: 01/09/2017] [Indexed: 10/20/2022]
|
57
|
Kim JY, Lee C, Park K, Han S, Kim C. High-speed and high-SNR photoacoustic microscopy based on a galvanometer mirror in non-conducting liquid. Sci Rep 2016; 6:34803. [PMID: 27708379 PMCID: PMC5052531 DOI: 10.1038/srep34803] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 09/20/2016] [Indexed: 12/16/2022] Open
Abstract
Optical-resolution photoacoustic microscopy (OR-PAM), a promising microscopic imaging technique with high ultrasound resolution and superior optical sensitivity, can provide anatomical, functional, and molecular information at scales ranging from the microvasculature to single red blood cells. In particular, real-time OR-PAM imaging with a high signal-to-noise ratio (SNR) is a prerequisite for widespread use in preclinical and clinical applications. Although several technical approaches have been pursued to simultaneously improve the imaging speed and SNR of OR-PAM, they are bulky, complex, not sensitive, and/or not actually real-time. In this paper, we demonstrate a simple and novel OR-PAM technique which is based on a typical galvanometer immersed in non-conducting liquid. Using an opto-ultrasound combiner, this OR-PAM system achieves a high SNR and fast imaging speed. It takes only 2 seconds to acquire a volumetric image with a wide field of view (FOV) of 4 × 8 mm2 along the X and Y axes, respectively. The measured lateral and axial resolutions are 6.0 and 37.7 μm, respectively. Finally, as a demonstration of the system's capability, we successfully imaged the microvasculature in a mouse ear in vivo. Our new method will contribute substantially to the popularization and commercialization of OR-PAM in various preclinical and clinical applications.
Collapse
Affiliation(s)
- Jin Young Kim
- Future IT Innovation Laboratory, Department of Creative IT Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk, 37673 Republic of Korea
| | - Changho Lee
- Future IT Innovation Laboratory, Department of Creative IT Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk, 37673 Republic of Korea
| | - Kyungjin Park
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk, 37673 Republic of Korea
| | - Sangyeob Han
- Oz-tec Co., Ltd., Rm 901, IT convergence industrial bldg., 47, Gyeongdaero 17 gil, Bukgu, Daegu, 41566 Republic of Korea
| | - Chulhong Kim
- Future IT Innovation Laboratory, Department of Creative IT Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk, 37673 Republic of Korea
| |
Collapse
|
58
|
Mastanduno MA, Gambhir SS. Quantitative photoacoustic image reconstruction improves accuracy in deep tissue structures. BIOMEDICAL OPTICS EXPRESS 2016; 7:3811-3825. [PMID: 27867695 PMCID: PMC5102520 DOI: 10.1364/boe.7.003811] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 08/05/2016] [Accepted: 08/09/2016] [Indexed: 05/23/2023]
Abstract
Photoacoustic imaging (PAI) is emerging as a potentially powerful imaging tool with multiple applications. Image reconstruction for PAI has been relatively limited because of limited or no modeling of light delivery to deep tissues. This work demonstrates a numerical approach to quantitative photoacoustic image reconstruction that minimizes depth and spectrally derived artifacts. We present the first time-domain quantitative photoacoustic image reconstruction algorithm that models optical sources through acoustic data to create quantitative images of absorption coefficients. We demonstrate quantitative accuracy of less than 5% error in large 3 cm diameter 2D geometries with multiple targets and within 22% error in the largest size quantitative photoacoustic studies to date (6cm diameter). We extend the algorithm to spectral data, reconstructing 6 varying chromophores to within 17% of the true values. This quantitiative PA tomography method was able to improve considerably on filtered-back projection from the standpoint of image quality, absolute, and relative quantification in all our simulation geometries. We characterize the effects of time step size, initial guess, and source configuration on final accuracy. This work could help to generate accurate quantitative images from both endogenous absorbers and exogenous photoacoustic dyes in both preclinical and clinical work, thereby increasing the information content obtained especially from deep-tissue photoacoustic imaging studies.
Collapse
|
59
|
Valluru KS, Wilson KE, Willmann JK. Photoacoustic Imaging in Oncology: Translational Preclinical and Early Clinical Experience. Radiology 2016; 280:332-49. [PMID: 27429141 PMCID: PMC4976462 DOI: 10.1148/radiol.16151414] [Citation(s) in RCA: 117] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Photoacoustic imaging has evolved into a clinically translatable platform with the potential to complement existing imaging techniques for the management of cancer, including detection, characterization, prognosis, and treatment monitoring. In photoacoustic imaging, tissue is optically excited to produce ultrasonographic images that represent a spatial map of optical absorption of endogenous constituents such as hemoglobin, fat, melanin, and water or exogenous contrast agents such as dyes and nanoparticles. It can therefore provide functional and molecular information that allows noninvasive soft-tissue characterization. Photoacoustic imaging has matured over the years and is currently being translated into the clinic with various clinical studies underway. In this review, the current state of photoacoustic imaging is presented, including techniques and instrumentation, followed by a discussion of potential clinical applications of this technique for the detection and management of cancer. (©) RSNA, 2016.
Collapse
Affiliation(s)
- Keerthi S. Valluru
- From the Department of Radiology, Molecular Imaging Program at Stanford, Stanford University School of Medicine, 300 Pasteur Dr, Room H1307, Stanford, CA 94305-5621
| | - Katheryne E. Wilson
- From the Department of Radiology, Molecular Imaging Program at Stanford, Stanford University School of Medicine, 300 Pasteur Dr, Room H1307, Stanford, CA 94305-5621
| | - Jürgen K. Willmann
- From the Department of Radiology, Molecular Imaging Program at Stanford, Stanford University School of Medicine, 300 Pasteur Dr, Room H1307, Stanford, CA 94305-5621
| |
Collapse
|
60
|
Bocklitz TW, Salah FS, Vogler N, Heuke S, Chernavskaia O, Schmidt C, Waldner MJ, Greten FR, Bräuer R, Schmitt M, Stallmach A, Petersen I, Popp J. Pseudo-HE images derived from CARS/TPEF/SHG multimodal imaging in combination with Raman-spectroscopy as a pathological screening tool. BMC Cancer 2016; 16:534. [PMID: 27460472 PMCID: PMC4962450 DOI: 10.1186/s12885-016-2520-x] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 07/05/2016] [Indexed: 01/14/2023] Open
Abstract
Background Due to the steadily increasing number of cancer patients worldwide the early diagnosis and treatment of cancer is a major field of research. The diagnosis of cancer is mostly performed by an experienced pathologist via the visual inspection of histo-pathological stained tissue sections. To save valuable time, low quality cryosections are frequently analyzed with diagnostic accuracies that are below those of high quality embedded tissue sections. Thus, alternative means have to be found that enable for fast and accurate diagnosis as the basis of following clinical decision making. Methods In this contribution we will show that the combination of the three label-free non-linear imaging modalities CARS (coherent anti-Stokes Raman-scattering), TPEF (two-photon excited autofluorescence) and SHG (second harmonic generation) yields information that can be translated into computational hematoxylin and eosin (HE) images by multivariate statistics. Thereby, a computational HE stain is generated resulting in pseudo-HE overview images that allow for identification of suspicious regions. The latter are analyzed further by Raman-spectroscopy retrieving the tissue’s molecular fingerprint. Results The results suggest that the combination of non-linear multimodal imaging and Raman-spectroscopy possesses the potential as a precise and fast tool in routine histopathology. Conclusions As the key advantage, both optical methods are non-invasive enabling for further pathological investigations of the same tissue section, e.g. a direct comparison with the current pathological gold-standard.
Collapse
Affiliation(s)
- Thomas W Bocklitz
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller University Jena, Helmholtzweg 4, Jena, Germany. .,Leibniz-Institute of Photonic Technology, Albert-Einstein-Str. 9, Jena, 07745, Germany.
| | - Firas Subhi Salah
- Iraqi Centre for Cancer and Medical Genetics Research, Al-Mustansiriya University, Baghdad, Iraq.,Institute of Pathology, University Hospital - Friedrich Schiller University Jena, Ziegelmühlenweg 1, Jena, D-07743, Germany
| | - Nadine Vogler
- Leibniz-Institute of Photonic Technology, Albert-Einstein-Str. 9, Jena, 07745, Germany
| | - Sandro Heuke
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller University Jena, Helmholtzweg 4, Jena, Germany.,Leibniz-Institute of Photonic Technology, Albert-Einstein-Str. 9, Jena, 07745, Germany
| | - Olga Chernavskaia
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller University Jena, Helmholtzweg 4, Jena, Germany.,Leibniz-Institute of Photonic Technology, Albert-Einstein-Str. 9, Jena, 07745, Germany
| | - Carsten Schmidt
- Clinic for Internal Medicine IV, Jena University Hospital, Jena, 07747, Germany
| | - Maximilian J Waldner
- Department of Medicine 1, Friedrich-Alexander-University, Erlangen, 91054, Germany.,Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Florian R Greten
- Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, Paul-Ehrlich-Straße 42-44, Frankfurt, 60596, Germany
| | - Rolf Bräuer
- Institute of Pathology, University Hospital - Friedrich Schiller University Jena, Ziegelmühlenweg 1, Jena, D-07743, Germany
| | - Michael Schmitt
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller University Jena, Helmholtzweg 4, Jena, Germany
| | - Andreas Stallmach
- Clinic for Internal Medicine IV, Jena University Hospital, Jena, 07747, Germany
| | - Iver Petersen
- Institute of Pathology, University Hospital - Friedrich Schiller University Jena, Ziegelmühlenweg 1, Jena, D-07743, Germany
| | - Jürgen Popp
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller University Jena, Helmholtzweg 4, Jena, Germany. .,Leibniz-Institute of Photonic Technology, Albert-Einstein-Str. 9, Jena, 07745, Germany.
| |
Collapse
|
61
|
Zhou Y, Yao J, Wang LV. Tutorial on photoacoustic tomography. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:61007. [PMID: 27086868 PMCID: PMC4834026 DOI: 10.1117/1.jbo.21.6.061007] [Citation(s) in RCA: 174] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 03/22/2016] [Indexed: 05/18/2023]
Abstract
Photoacoustic tomography (PAT) has become one of the fastest growing fields in biomedical optics. Unlike pure optical imaging, such as confocal microscopy and two-photon microscopy, PAT employs acoustic detection to image optical absorption contrast with high-resolution deep into scattering tissue. So far, PAT has been widely used for multiscale anatomical, functional, and molecular imaging of biological tissues. We focus on PAT’s basic principles, major implementations, imaging contrasts, and recent applications.
Collapse
Affiliation(s)
- Yong Zhou
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, One Brookings Drive, Campus Box 1097, St. Louis, Missouri 63130, United States
| | - Junjie Yao
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, One Brookings Drive, Campus Box 1097, St. Louis, Missouri 63130, United States
| | - Lihong V. Wang
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, One Brookings Drive, Campus Box 1097, St. Louis, Missouri 63130, United States
| |
Collapse
|
62
|
Ma J, Shi J, Hai P, Zhou Y, Wang LV. Grueneisen relaxation photoacoustic microscopy in vivo. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:66005. [PMID: 27272096 PMCID: PMC4897030 DOI: 10.1117/1.jbo.21.6.066005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 05/19/2016] [Indexed: 05/10/2023]
Abstract
Grueneisen relaxation photoacoustic microscopy (GR-PAM) can achieve optically defined axial resolution, but it has been limited to ex vivo demonstrations so far. Here, we present the first in vivo image of a mouse brain acquired with GR-PAM. To induce the GR effect, an intensity-modulated continuous-wave laser was employed to heat absorbing objects. In phantom experiments, an axial resolution of 12.5 μm was achieved, which is sixfold better than the value achieved by conventional optical-resolution PAM. This axial-resolution improvement was further demonstrated by imaging a mouse brain in vivo, where significantly narrower axial profiles of blood vessels were observed. The in vivo demonstration of GR-PAM shows the potential of this modality for label-free and high-resolution anatomical and functional imaging of biological tissues.
Collapse
Affiliation(s)
- Jun Ma
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, Campus Box 1097, One Brooking Drive, St. Louis, Missouri 63130-4899, United States
| | - Junhui Shi
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, Campus Box 1097, One Brooking Drive, St. Louis, Missouri 63130-4899, United States
| | - Pengfei Hai
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, Campus Box 1097, One Brooking Drive, St. Louis, Missouri 63130-4899, United States
| | - Yong Zhou
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, Campus Box 1097, One Brooking Drive, St. Louis, Missouri 63130-4899, United States
| | - Lihong V. Wang
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, Campus Box 1097, One Brooking Drive, St. Louis, Missouri 63130-4899, United States
| |
Collapse
|
63
|
Choi B, Tan W, Jia W, White SM, Moy WJ, Yang BY, Zhu J, Chen Z, Kelly KM, Nelson JS. The Role of Laser Speckle Imaging in Port-Wine Stain Research: Recent Advances and Opportunities. IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS : A PUBLICATION OF THE IEEE LASERS AND ELECTRO-OPTICS SOCIETY 2016; 2016:6800812. [PMID: 27013846 PMCID: PMC4800318 DOI: 10.1109/jstqe.2015.2493961] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Here, we review our current knowledge on the etiology and treatment of port-wine stain (PWS) birthmarks. Current treatment options have significant limitations in terms of efficacy. With the combination of 1) a suitable preclinical microvascular model, 2) laser speckle imaging (LSI) to evaluate blood-flow dynamics, and 3) a longitudinal experimental design, rapid preclinical assessment of new phototherapies can be translated from the lab to the clinic. The combination of photodynamic therapy (PDT) and pulsed-dye laser (PDL) irradiation achieves a synergistic effect that reduces the required radiant exposures of the individual phototherapies to achieve persistent vascular shutdown. PDL combined with anti-angiogenic agents is a promising strategy to achieve persistent vascular shutdown by preventing reformation and reperfusion of photocoagulated blood vessels. Integration of LSI into the clinical workflow may lead to surgical image guidance that maximizes acute photocoagulation, is expected to improve PWS therapeutic outcome. Continued integration of noninvasive optical imaging technologies and biochemical analysis collectively are expected to lead to more robust treatment strategies.
Collapse
Affiliation(s)
- Bernard Choi
- Departments of Biomedical Engineering and Surgery, the Beckman Laser Institute and Medical Clinic, and the Edwards Lifesciences Center for Advanced Cardiovascular Technology, all at University of California, Irvine 92612 USA
| | - Wenbin Tan
- Beckman Laser Institute and Medical Clinic, University of California, Irvine 92612 USA
| | - Wangcun Jia
- Beckman Laser Institute and Medical Clinic, University of California, Irvine 92612 USA
| | - Sean M. White
- Beckman Laser Institute and Medical Clinic, University of California, Irvine 92612 USA
| | - Wesley J. Moy
- Beckman Laser Institute and Medical Clinic, University of California, Irvine 92612 USA
| | - Bruce Y. Yang
- Beckman Laser Institute and Medical Clinic, University of California, Irvine 92612 USA
| | | | | | - Kristen M. Kelly
- Department of Dermatology and the Beckman Laser Institute and Medical Clinic, all at University of California, Irvine 92612 USA
| | - J. Stuart Nelson
- Departments of Biomedical Engineering and Surgery and the Beckman Laser Institute and Medical Clinic, all at University of California, Irvine 92612 USA
| |
Collapse
|
64
|
Neuschmelting V, Burton NC, Lockau H, Urich A, Harmsen S, Ntziachristos V, Kircher MF. Performance of a Multispectral Optoacoustic Tomography (MSOT) System equipped with 2D vs. 3D Handheld Probes for Potential Clinical Translation. PHOTOACOUSTICS 2016; 4:1-10. [PMID: 27069872 PMCID: PMC4811917 DOI: 10.1016/j.pacs.2015.12.001] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 11/23/2015] [Accepted: 12/18/2015] [Indexed: 05/04/2023]
Abstract
A handheld approach to optoacoustic imaging is essential for the clinical translation. The first 2- and 3-dimensional handheld multispectral optoacoustic tomography (MSOT) probes featuring real-time unmixing have recently been developed. Imaging performance of both probes was determined in vitro and in a brain melanoma metastasis mouse model in vivo. T1-weighted MR images were acquired for anatomical reference. The limit of detection of melanoma cells in vitro was significantly lower using the 2D than the 3D probe. The signal decrease was more profound in relation to depth with the 3D versus the 2D probe. Both approaches were capable of imaging the melanoma tumors qualitatively at all time points. Quantitatively, the 2D approach enabled closer anatomical resemblance of the tumor compared to the 3D probe, particularly at depths beyond 3 mm. The 3D probe was shown to be superior for rapid 3D imaging and, thus, holds promise for more superficial target structures.
Collapse
Affiliation(s)
- Volker Neuschmelting
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, USA
- Department of Neurosurgery, University Hospital Cologne, Cologne, Germany
| | | | - Hannah Lockau
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, USA
| | | | - Stefan Harmsen
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, USA
| | - Vasilis Ntziachristos
- Institute for Biological and Medical Imaging, Helmholtz Zentrum, Munich, Germany
- Chair for Biological Imaging, Technische Universität München, Germany
| | - Moritz F. Kircher
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, USA
- Center for Molecular Imaging and Nanotechnology (CMINT), Memorial Sloan Kettering Cancer Center, New York, USA
- Department of Radiology, Weill Cornell Medical College, New York, USA
- Corresponding author at: Memorial Sloan Kettering Cancer Center, Department of Radiology, and Center for Molecular Imaging & Nanotechnology (CMINT), 1275 York Ave, New York, NY 10065, USA. Tel.: +1 646 888-3371; fax: +1 646 422-0408.
| |
Collapse
|
65
|
Zhou Y, Liang J, Wang LV. Cuffing-based photoacoustic flowmetry in humans in the optical diffusive regime. JOURNAL OF BIOPHOTONICS 2016; 9:208-12. [PMID: 26515158 PMCID: PMC4775313 DOI: 10.1002/jbio.201500181] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 09/15/2015] [Accepted: 09/26/2015] [Indexed: 05/07/2023]
Abstract
Measuring blood flow speed in the optical diffusive regime in humans has been a long standing challenge for photoacoustic tomography. In this work, we proposed a cuffing-based method to quantify blood flow speed in humans with a handheld photoacoustic probe. By cuffing and releasing the blood vessel, we can measure the blood flow speed downstream. In phantom experiments, we demonstrated that the minimum and maximum measurable flow speeds were 0.035 mm/s and 42 mm/s, respectively. In human experiments, flow speeds were measured in three different blood vessels: a radial artery in the right forearm, a radial artery in the index finger of the right hand, and a radial vein in the right forearm. Taking advantage of the handheld probe, our method can potentially be used to monitor blood flow speed in the clinic and at the bedside.
Collapse
Affiliation(s)
- Yong Zhou
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, 1 Brookings Drive, Campus Box 1097, St. Louis, Missouri, 63130, USA
| | - Jinyang Liang
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, 1 Brookings Drive, Campus Box 1097, St. Louis, Missouri, 63130, USA
| | - Lihong V Wang
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, 1 Brookings Drive, Campus Box 1097, St. Louis, Missouri, 63130, USA.
| |
Collapse
|
66
|
Liu Y, Nie L, Chen X. Photoacoustic Molecular Imaging: From Multiscale Biomedical Applications Towards Early-Stage Theranostics. Trends Biotechnol 2016; 34:420-433. [PMID: 26924233 DOI: 10.1016/j.tibtech.2016.02.001] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 01/28/2016] [Accepted: 02/01/2016] [Indexed: 10/22/2022]
Abstract
Photoacoustic imaging (PAI) has ushered in a new era of observational biotechnology and has facilitated the exploration of fundamental biological mechanisms and clinical translational applications, which has attracted tremendous attention in recent years. By converting laser into ultrasound emission, PAI combines rich optical contrast, high ultrasonic spatial resolution, and deep penetration depth in a single modality. This evolutional technique enables multiscale and multicontrast visualization from cells to organs, anatomy to function, and molecules to metabolism with high sensitivity and specificity. The state-of-the-art developments and applications of PAI are described in this review. Future prospects for clinical use are also highlighted. Collectively, PAI holds great promise to drive biomedical applications towards early-stage theranostics.
Collapse
Affiliation(s)
- Yajing Liu
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, Center for Molecular Imaging and Translational Medicine (CMITM), School of Public Health, Xiamen University, Xiamen 361102, China
| | - Liming Nie
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, Center for Molecular Imaging and Translational Medicine (CMITM), School of Public Health, Xiamen University, Xiamen 361102, China.
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD 20892, USA.
| |
Collapse
|
67
|
Biswas SK, van Es P, Steenbergen W, Manohar S. A Method for Delineation of Bone Surfaces in Photoacoustic Computed Tomography of the Finger. ULTRASONIC IMAGING 2016; 38:63-76. [PMID: 26048066 DOI: 10.1177/0161734615589288] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Photoacoustic (PA) imaging of interphalangeal peripheral joints is of interest in the context of using the synovial membrane as a surrogate marker of rheumatoid arthritis. Previous work has shown that ultrasound (US) produced by absorption of light at the epidermis reflects on the bone surfaces within the finger. When the reflected signals are backprojected in the region of interest, artifacts are produced, confounding interpretation of the images. In this work, we present an approach where the PA signals known to originate from the epidermis are treated as virtual US transmitters, and a separate reconstruction is performed as in US reflection imaging. This allows us to identify the bone surfaces. Furthermore, the identification of the joint space is important as this provides a landmark to localize a region-of-interest in seeking the inflamed synovial membrane. The ability to delineate bone surfaces allows us to identify not only the artifacts but also the interphalangeal joint space without recourse to new US hardware or a new measurement. We test the approach on phantoms and on a healthy human finger.
Collapse
Affiliation(s)
- S K Biswas
- Biomedical Photonic Imaging, University of Twente, Enschede, The Netherlands Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, India
| | - P van Es
- Biomedical Photonic Imaging, University of Twente, Enschede, The Netherlands
| | - W Steenbergen
- Biomedical Photonic Imaging, University of Twente, Enschede, The Netherlands
| | - S Manohar
- Biomedical Photonic Imaging, University of Twente, Enschede, The Netherlands
| |
Collapse
|
68
|
Abstract
Photoacoustic tomography (PAT) combines rich optical absorption contrast with the high spatial resolution of ultrasound at depths in tissue. The high scalability of PAT has enabled anatomical imaging of biological structures ranging from organelles to organs. The inherent functional and molecular imaging capabilities of PAT have further allowed it to measure important physiological parameters and track critical cellular activities. Integration of PAT with other imaging technologies provides complementary capabilities and can potentially accelerate the clinical translation of PAT.
Collapse
Affiliation(s)
- Junjie Yao
- Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University in St. Louis, MO, USA
| | - Jun Xia
- Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University in St. Louis, MO, USA Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, NY, USA
| | - Lihong V Wang
- Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University in St. Louis, MO, USA
| |
Collapse
|
69
|
Banno M, Nagashima A, Yui H. Stimulated Raman photoacoustic spectroscopy for chemical-contrast imaging of a sample deeply buried in scattering media. Analyst 2016; 141:5747-5752. [DOI: 10.1039/c6an01211f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The development of a wavelength-variable stimulated Raman scattering photoacoustic spectrometer and its application to a sample buried in highly scattering media are presented.
Collapse
Affiliation(s)
- Motohiro Banno
- Department of Chemistry
- Faculty of Science
- Tokyo University of Science
- Tokyo 162-8601
- Japan
| | - Ami Nagashima
- Department of Chemistry
- Faculty of Science
- Tokyo University of Science
- Tokyo 162-8601
- Japan
| | - Hiroharu Yui
- Department of Chemistry
- Faculty of Science
- Tokyo University of Science
- Tokyo 162-8601
- Japan
| |
Collapse
|
70
|
Zhou Y, Li G, Zhu L, Li C, Cornelius LA, Wang LV. Handheld photoacoustic probe to detect both melanoma depth and volume at high speed in vivo. JOURNAL OF BIOPHOTONICS 2015; 8:961-967. [PMID: 25676898 PMCID: PMC4530093 DOI: 10.1002/jbio.201400143] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 01/05/2015] [Accepted: 01/06/2015] [Indexed: 05/04/2023]
Abstract
We applied a linear-array-based photoacoustic probe to detect melanin-containing melanoma tumor depth and volume in nude mice in vivo. This system can image melanomas at five frames per second (fps), which is much faster than our previous handheld single transducer system (0.1 fps). We first theoretically show that, in addition to the higher frame rate, almost the entire boundary of the melanoma can be detected by the linear-array-based probe, while only the horizontal boundary could be detected by the previous system. Then we demonstrate the ability of this linear-array-based system in measuring both the depth and volume of melanoma through phantom, ex vivo, and in vivo experiments. The volume detection ability also enables us to accurately calculate the rate of growth of the tumor, which is an important parameter in quantifying the tumor activity. Our results show that this system can be used for clinical melanoma diagnosis and treatment in humans at the bedside. Linear-array-based PA images of melanoma acquired in vivo on day 3 (a) and day 6 (b).
Collapse
Affiliation(s)
- Yong Zhou
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, 1 Brookings Drive, Campus Box 1097, St. Louis, Missouri 63130
| | - Guo Li
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, 1 Brookings Drive, Campus Box 1097, St. Louis, Missouri 63130
| | - Liren Zhu
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, 1 Brookings Drive, Campus Box 1097, St. Louis, Missouri 63130
| | - Chiye Li
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, 1 Brookings Drive, Campus Box 1097, St. Louis, Missouri 63130
| | - Lynn A. Cornelius
- Washington University School of Medicine, Division of Dermatology, 660 S. Euclid, Campus Box 8123, St. Louis, Missouri 63110
| | - Lihong V. Wang
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, 1 Brookings Drive, Campus Box 1097, St. Louis, Missouri 63130
- Correspondence:
| |
Collapse
|
71
|
Zhou Y, Poudel J, Li G, Wang LV. In vivo photoacoustic flowmetry at depths of the diffusive regime based on saline injection. JOURNAL OF BIOMEDICAL OPTICS 2015; 20:87001. [PMID: 26267364 PMCID: PMC4681378 DOI: 10.1117/1.jbo.20.8.087001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Accepted: 07/20/2015] [Indexed: 05/23/2023]
Abstract
We propose a saline injection-based method to quantify blood flow velocity in vivo with acoustic-resolution photoacoustic tomography. By monitoring the saline–blood interface propagating in the blood vessel, the flow velocity can be resolved. We first demonstrated our method in phantom experiments, where a root mean square error of prediction of 0.29 mm/s was achieved. By injecting saline into a mouse tail vein covered with 1 mm chicken tissue, we showed that the flow velocity in the tail vein could be measured at depths, which is especially pertinent to monitoring blood flow velocity in patients undergoing intravenous infusion.
Collapse
Affiliation(s)
- Yong Zhou
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, 1 Brookings Drive, Campus Box 1097, St. Louis, Missouri 63130, United States
| | - Joemini Poudel
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, 1 Brookings Drive, Campus Box 1097, St. Louis, Missouri 63130, United States
| | - Guo Li
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, 1 Brookings Drive, Campus Box 1097, St. Louis, Missouri 63130, United States
| | - Lihong V. Wang
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, 1 Brookings Drive, Campus Box 1097, St. Louis, Missouri 63130, United States
| |
Collapse
|
72
|
de Boer E, Harlaar NJ, Taruttis A, Nagengast WB, Rosenthal EL, Ntziachristos V, van Dam GM. Optical innovations in surgery. Br J Surg 2015; 102:e56-72. [PMID: 25627136 DOI: 10.1002/bjs.9713] [Citation(s) in RCA: 112] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 10/20/2014] [Indexed: 12/31/2022]
Abstract
BACKGROUND In the past decade, there has been a major drive towards clinical translation of optical and, in particular, fluorescence imaging in surgery. In surgical oncology, radical surgery is characterized by the absence of positive resection margins, a critical factor in improving prognosis. Fluorescence imaging provides the surgeon with reliable and real-time intraoperative feedback to identify surgical targets, including positive tumour margins. It also may enable decisions on the possibility of intraoperative adjuvant treatment, such as brachytherapy, chemotherapy or emerging targeted photodynamic therapy (photoimmunotherapy). METHODS This article reviews the use of optical imaging for intraoperative guidance and decision-making. RESULTS Image-guided cancer surgery has the potential to be a powerful tool in guiding future surgical care. Photoimmunotherapy is a theranostic concept (simultaneous diagnosis and treatment) on the verge of clinical translation, and is highlighted as an effective combination of image-guided surgery and intraoperative treatment of residual disease. Multispectral optoacoustic tomography, a technique complementary to optical image-guided surgery, is currently being tested in humans and is anticipated to have great potential for perioperative and postoperative application in surgery. CONCLUSION Significant advances have been achieved in real-time optical imaging strategies for intraoperative tumour detection and margin assessment. Optical imaging holds promise in achieving the highest percentage of negative surgical margins and in early detection of micrometastastic disease over the next decade.
Collapse
Affiliation(s)
- E de Boer
- Department of Surgery, Groningen, The Netherlands; Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | | | | | | | | | | | | |
Collapse
|
73
|
Tang M, Zhou Y, Zhang R, Wang LV. Noninvasive photoacoustic microscopy of methemoglobin in vivo. JOURNAL OF BIOMEDICAL OPTICS 2015; 20:036007. [PMID: 25760655 PMCID: PMC4356553 DOI: 10.1117/1.jbo.20.3.036007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 02/20/2015] [Indexed: 05/29/2023]
Abstract
Due to the various causes of methemoglobinemia and its potential to be confused with other diseases, in vivo measurements of methemoglobin have significant applications in the clinic. Using photoacoustic microscopy (PAM), we quantified the average and the distributed percentage of methemoglobin both in vitro and in vivo. Based on the absorption spectra of methemoglobin, oxyhemoglobin, and deoxyhemoglobin, three wavelengths were chosen to differentiate methemoglobin from the others. The methemoglobin concentrations calculated from the photoacoustic signals agreed well with the preset concentrations. Then we imaged the methemoglobin percentage in microtubes that mimicked blood vessels. Average percentages calculated for five samples with different methemoglobin concentrations also agreed well with the preset values. Finally, we demonstrated the ability of PAM to detect methemoglobin in vivo in a mouse ear. Our results show that PAM can quantitatively image methemoglobin distribution in vivo.
Collapse
Affiliation(s)
- Min Tang
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, One Brookings Drive, St. Louis, Missouri 63130, United States
| | - Yong Zhou
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, One Brookings Drive, St. Louis, Missouri 63130, United States
| | - Ruiying Zhang
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, One Brookings Drive, St. Louis, Missouri 63130, United States
| | - Lihong V. Wang
- Washington University in St. Louis, Department of Biomedical Engineering, Optical Imaging Laboratory, One Brookings Drive, St. Louis, Missouri 63130, United States
| |
Collapse
|
74
|
Subochev P, Orlova A, Shirmanova M, Postnikova A, Turchin I. Simultaneous photoacoustic and optically mediated ultrasound microscopy: an in vivo study. BIOMEDICAL OPTICS 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] [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
|
75
|
Schwarz M, Omar M, Buehler A, Aguirre J, Ntziachristos V. Implications of ultrasound frequency in optoacoustic mesoscopy of the skin. IEEE TRANSACTIONS ON MEDICAL IMAGING 2015; 34:672-7. [PMID: 25361501 DOI: 10.1109/tmi.2014.2365239] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Raster-scan optoacoustic mesoscopy (RSOM) comes with high potential for in vivo diagnostic imaging in dermatology, since it allows for high resolution imaging of the natural chromophores melanin, and hemoglobin at depths of several millimeters. We have applied ultra-wideband RSOM, in the 10-160 MHz frequency band, to image healthy human skin at distinct locations. We analyzed the anatomical information contained at different frequency ranges of the optoacoustic (photoacoustic) signals in relation to resolving features of different skin layers in vivo. We further compared results obtained from glabrous and hairy skin and identify that frequencies above 60 MHz are necessary for revealing the epidermal thickness, a prerequisite for determining the invasion depth of melanoma in future studies. By imaging a benign nevus we show that the applied RSOM system provides strong contrast of melanin-rich structures. We further identify the spectral bands responsible for imaging the fine structures in the stratum corneum, assessing dermal papillae, and resolving microvascular structures in the horizontal plexus.
Collapse
|
76
|
Kim JY, Lee C, Park K, Lim G, Kim C. Fast optical-resolution photoacoustic microscopy using a 2-axis water-proofing MEMS scanner. Sci Rep 2015; 5:7932. [PMID: 25604654 PMCID: PMC4300456 DOI: 10.1038/srep07932] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 12/22/2014] [Indexed: 11/17/2022] Open
Abstract
Optical-resolution photoacoustic microscopy (OR-PAM) is a novel label-free microscopic imaging tool to provide in vivo optical absorbing contrasts. Specially, it is crucial to equip a real-time imaging capability without sacrificing high signal-to-noise ratios (SNRs) for identifying and tracking specific diseases in OR-PAM. Herein we demonstrate a 2-axis water-proofing MEMS scanner made of flexible PDMS. This flexible scanner results in a wide scanning range (9 × 4 mm(2) in a transverse plane) and a fast imaging speed (5 B-scan images per second). Further, the MEMS scanner is fabricated in a compact footprint with a size of 15 × 15 × 15 mm(3). More importantly, the scanning ability in water makes the MEMS scanner possible to confocally and simultaneously reflect both ultrasound and laser, and consequently we can maintain high SNRs. The lateral and axial resolutions of the OR-PAM system are 3.6 and 27.7 μm, respectively. We have successfully monitored the flow of carbon particles in vitro with a volumetric display frame rate of 0.14 Hz. Finally, we have successfully obtained in vivo PA images of microvasculatures in a mouse ear. It is expected that our compact and fast OR-PAM system can be significantly useful in both preclinical and clinical applications.
Collapse
Affiliation(s)
- Jin Young Kim
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea
| | - Changho Lee
- Department of Creative IT Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea
| | - Kyungjin Park
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea
| | - Geunbae Lim
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea
| | - Chulhong Kim
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea
- Department of Creative IT Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea
| |
Collapse
|
77
|
Vogler N, Heuke S, Bocklitz TW, Schmitt M, Popp J. Multimodal Imaging Spectroscopy of Tissue. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2015; 8:359-87. [PMID: 26070717 DOI: 10.1146/annurev-anchem-071114-040352] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Advanced optical imaging technologies have experienced increased visibility in medical research, as they allow for a label-free and nondestructive investigation of tissue in either an excised state or living organisms. In addition to a multitude of ex vivo studies proving the applicability of these optical imaging approaches, a transfer of various modalities toward in vivo diagnosis is currently in progress as well. Furthermore, combining optical imaging techniques, referred to as multimodal imaging, allows for an improved diagnostic reliability due to the complementary nature of retrieved information. In this review, we provide a summary of ongoing multifold efforts in multimodal tissue imaging and focus in particular on in vivo applications for medical diagnosis. We also discuss the advantages and potential limitations of the imaging methods and outline opportunities for future developments.
Collapse
Affiliation(s)
- Nadine Vogler
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller University Jena, 07743 Jena, Germany;
| | | | | | | | | |
Collapse
|