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John S, Hester S, Basij M, Paul A, Xavierselvan M, Mehrmohammadi M, Mallidi S. Niche preclinical and clinical applications of photoacoustic imaging with endogenous contrast. PHOTOACOUSTICS 2023; 32:100533. [PMID: 37636547 PMCID: PMC10448345 DOI: 10.1016/j.pacs.2023.100533] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 06/30/2023] [Accepted: 07/14/2023] [Indexed: 08/29/2023]
Abstract
In the past decade, photoacoustic (PA) imaging has attracted a great deal of popularity as an emergent diagnostic technology owing to its successful demonstration in both preclinical and clinical arenas by various academic and industrial research groups. Such steady growth of PA imaging can mainly be attributed to its salient features, including being non-ionizing, cost-effective, easily deployable, and having sufficient axial, lateral, and temporal resolutions for resolving various tissue characteristics and assessing the therapeutic efficacy. In addition, PA imaging can easily be integrated with the ultrasound imaging systems, the combination of which confers the ability to co-register and cross-reference various features in the structural, functional, and molecular imaging regimes. PA imaging relies on either an endogenous source of contrast (e.g., hemoglobin) or those of an exogenous nature such as nano-sized tunable optical absorbers or dyes that may boost imaging contrast beyond that provided by the endogenous sources. In this review, we discuss the applications of PA imaging with endogenous contrast as they pertain to clinically relevant niches, including tissue characterization, cancer diagnostics/therapies (termed as theranostics), cardiovascular applications, and surgical applications. We believe that PA imaging's role as a facile indicator of several disease-relevant states will continue to expand and evolve as it is adopted by an increasing number of research laboratories and clinics worldwide.
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Affiliation(s)
- Samuel John
- Department of Biomedical Engineering, Wayne State University, Detroit, MI, USA
| | - Scott Hester
- Department of Biomedical Engineering, Tufts University, Medford, MA, USA
| | - Maryam Basij
- Department of Biomedical Engineering, Wayne State University, Detroit, MI, USA
| | - Avijit Paul
- Department of Biomedical Engineering, Tufts University, Medford, MA, USA
| | | | - Mohammad Mehrmohammadi
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, NY, USA
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, USA
- Wilmot Cancer Institute, Rochester, NY, USA
| | - Srivalleesha Mallidi
- Department of Biomedical Engineering, Tufts University, Medford, MA, USA
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA 02114, USA
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2
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Özsoy Ç, Lafci B, Reiss M, Deán-Ben XL, Razansky D. Real-time assessment of high-intensity focused ultrasound heating and cavitation with hybrid optoacoustic ultrasound imaging. PHOTOACOUSTICS 2023; 31:100508. [PMID: 37228577 PMCID: PMC10203775 DOI: 10.1016/j.pacs.2023.100508] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 04/27/2023] [Accepted: 05/06/2023] [Indexed: 05/27/2023]
Abstract
High-intensity focused ultrasound (HIFU) enables localized ablation of biological tissues by capitalizing on the synergistic effects of heating and cavitation. Monitoring of those effects is essential for improving the efficacy and safety of HIFU interventions. Herein, we suggest a hybrid optoacoustic-ultrasound (OPUS) approach for real-time assessment of heating and cavitation processes while providing an essential anatomical reference for accurate localization of the HIFU-induced lesion. Both effects could clearly be observed by exploiting the temperature dependence of optoacoustic (OA) signals and the strong contrast of gas bubbles in pulse-echo ultrasound (US) images. The differences in temperature increase and its rate, as recorded with a thermal camera for different HIFU pressures, evinced the onset of cavitation at the expected pressure threshold. The estimated temperatures based on OA signal variations were also within 10-20 % agreement with the camera readings for temperatures below the coagulation threshold (∼50 °C). Experiments performed in excised tissues as well as in a post-mortem mouse demonstrate that both heating and cavitation effects can be effectively visualized and tracked using the OPUS approach. The good sensitivity of the suggested method for HIFU monitoring purposes was manifested by a significant increase in contrast-to-noise ratio within the ablated region by > 10 dB and > 5 dB for the OA and US images, respectively. The hybrid OPUS-based monitoring approach offers the ease of handheld operation thus can readily be implemented in a bedside setting to benefit several types of HIFU treatments used in the clinics.
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Affiliation(s)
- Çağla Özsoy
- Institute for Biomedical Engineering and Institute of Pharmacology and Toxicology, Faculty of Medicine, University of Zurich, Switzerland
- Institute for Biomedical Engineering, Department of Information Technology and Electrical Engineering, ETH Zurich, Switzerland
| | - Berkan Lafci
- Institute for Biomedical Engineering and Institute of Pharmacology and Toxicology, Faculty of Medicine, University of Zurich, Switzerland
- Institute for Biomedical Engineering, Department of Information Technology and Electrical Engineering, ETH Zurich, Switzerland
| | - Michael Reiss
- Institute for Biomedical Engineering and Institute of Pharmacology and Toxicology, Faculty of Medicine, University of Zurich, Switzerland
- Institute for Biomedical Engineering, Department of Information Technology and Electrical Engineering, ETH Zurich, Switzerland
| | - Xosé Luís Deán-Ben
- Institute for Biomedical Engineering and Institute of Pharmacology and Toxicology, Faculty of Medicine, University of Zurich, Switzerland
- Institute for Biomedical Engineering, Department of Information Technology and Electrical Engineering, ETH Zurich, Switzerland
| | - Daniel Razansky
- Institute for Biomedical Engineering and Institute of Pharmacology and Toxicology, Faculty of Medicine, University of Zurich, Switzerland
- Institute for Biomedical Engineering, Department of Information Technology and Electrical Engineering, ETH Zurich, Switzerland
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Ribart C, King A, Ludwig W, Bertoldo JPC, Proudhon H. In situ synchrotron X-ray multimodal experiment to study polycrystal plasticity. JOURNAL OF SYNCHROTRON RADIATION 2023; 30:379-389. [PMID: 36891851 PMCID: PMC10000803 DOI: 10.1107/s1600577522011705] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 12/06/2022] [Indexed: 06/18/2023]
Abstract
The microstructure of polycrystals is known to govern the performance of structural materials. This drives the need for mechanical characterization methods capable of probing large representative volumes at the grain and sub-grain scales. In this paper, the use of in situ diffraction contrast tomography (DCT) along with far-field 3D X-ray diffraction (ff-3DXRD) at the Psiché beamline of Soleil is presented and applied to study crystal plasticity in commercially pure titanium. A tensile stress rig was modified to comply with the DCT acquisition geometry and used for in situ testing. DCT and ff-3DXRD measurements were carried out during a tensile test of a tomographic Ti specimen up to 1.1% strain. The evolution of the microstructure was analyzed in a central region of interest comprising about 2000 grains. Using the 6DTV algorithm, DCT reconstructions were successfully obtained and allowed the characterization of the evolution of lattice rotation in the entire microstructure. The results are backed up by comparisons with EBSD and DCT maps acquired at ESRF-ID11 that allowed the validation of the orientation field measurements in the bulk. Difficulties at the grain boundaries are highlighted and discussed in line with increasing plastic strain during the tensile test. Finally, a new outlook is provided on the potential of ff-3DXRD to enrich the present dataset with access to average lattice elastic strain data per grain, on the possibility of performing crystal plasticity simulations from DCT reconstructions, and ultimately on comparisons between experiments and simulations at the scale of the grain.
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Affiliation(s)
- Clement Ribart
- Mines Paris, PSL University, Centre des Matériaux (MAT), UMR7633 CNRS, 91003 Evry, France
| | - Andrew King
- Synchrotron SOLEIL, L’Orme des Merisiers, BP 48, 91192 Gif-sur-Yvette, France
| | - Wolfgang Ludwig
- Université de Lyon, INSA-Lyon MATEIS CNRS UMR 5510, 69621 Villeurbanne, France
- European Synchrotron Radiation Facility, BP 220, 38043 Grenoble, France
| | - Joao P. C. Bertoldo
- Mines Paris, PSL University, Centre des Matériaux (MAT), UMR7633 CNRS, 91003 Evry, France
| | - Henry Proudhon
- Mines Paris, PSL University, Centre des Matériaux (MAT), UMR7633 CNRS, 91003 Evry, France
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Park S, Brooks FJ, Villa U, Su R, Anastasio MA, Oraevsky AA. Normalization of optical fluence distribution for three-dimensional functional optoacoustic tomography of the breast. JOURNAL OF BIOMEDICAL OPTICS 2022; 27:JBO-210367GR. [PMID: 35293163 PMCID: PMC8923705 DOI: 10.1117/1.jbo.27.3.036001] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 02/22/2022] [Indexed: 05/20/2023]
Abstract
SIGNIFICANCE In three-dimensional (3D) functional optoacoustic tomography (OAT), wavelength-dependent optical attenuation and nonuniform incident optical fluence limit imaging depth and field of view and can hinder accurate estimation of functional quantities, such as the vascular blood oxygenation. These limitations hinder OAT of large objects, such as a human female breast. AIM We aim to develop a measurement-data-driven method for normalization of the optical fluence distribution and to investigate blood vasculature detectability and accuracy for estimating vascular blood oxygenation. APPROACH The proposed method is based on reasonable assumptions regarding breast anatomy and optical properties. The nonuniform incident optical fluence is estimated based on the illumination geometry in the OAT system, and the depth-dependent optical attenuation is approximated using Beer-Lambert law. RESULTS Numerical studies demonstrated that the proposed method significantly enhanced blood vessel detectability and improved estimation accuracy of the vascular blood oxygenation from multiwavelength OAT measurements, compared with direct application of spectral linear unmixing without optical fluence compensation. Experimental results showed that the proposed method revealed previously invisible structures in regions deeper than 15 mm and/or near the chest wall. CONCLUSIONS The proposed method provides a straightforward and computationally inexpensive approximation of wavelength-dependent effective optical attenuation and, thus, enables mitigation of the spectral coloring effect in functional 3D OAT imaging.
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Affiliation(s)
- Seonyeong Park
- University of Illinois Urbana–Champaign, Department of Bioengineering, Urbana, Illinois, United States
| | - Frank J. Brooks
- University of Illinois Urbana–Champaign, Department of Bioengineering, Urbana, Illinois, United States
| | - Umberto Villa
- Washington University in St. Louis, Department of Electrical and Systems Engineering, St. Louis, Missouri, United States
| | - Richard Su
- TomoWave Laboratories, Houston, Texas, United States
| | - Mark A. Anastasio
- University of Illinois Urbana–Champaign, Department of Bioengineering, Urbana, Illinois, United States
| | - Alexander A. Oraevsky
- TomoWave Laboratories, Houston, Texas, United States
- Address all correspondence to Alexander A. Oraevsky,
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Photoacoustic Molecular Imaging: Principles and Practice. Mol Imaging 2021. [DOI: 10.1016/b978-0-12-816386-3.00016-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Miura Y, Seifert E, Rehra J, Kern K, Theisen-Kunde D, Denton M, Brinkmann R. Real-time optoacoustic temperature determination on cell cultures during heat exposure: a feasibility study. Int J Hyperthermia 2019; 36:466-472. [PMID: 30922131 DOI: 10.1080/02656736.2019.1590653] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
Objective/Purpose: In order to study the effects of hyperthermia and other temperature-related effects on cells and tissues, determining the precise time/temperature course is crucial. Here we present a non-contact optoacoustic technique, which provides temperatures during heating of cultured cells with scalable temporal and spatial resolution. METHODS A thulium laser (1.94 µm) with a maximum power of 15 W quickly and efficiently heats cells in a culture dish because of low penetration depth (1/e penetration depths of 78 µm) of the radiation in water. A repetitively Q-switched holmium laser (2.1 µm) is used simultaneously to probe temperatures at different locations in the dish by using the photoacoustic effect. Due to thermoelastic expansion of water, pressure waves are emitted and measured with an ultrasonic hydrophone at the side of the dish. The amplitudes of the waves are temperature dependent and can be used to calculate the temperature/time course at any location of probing. RESULTS We measured temperatures of up to 55 °C with a heating power of 6 W after 10 s, and subsequent lateral temperature profiles over time. Within this profile, temperature fluctuations were found, likely owing to thermal convection and water circulation. By using cultured retinal pigment epithelial cells, it is shown that the probe laser pulses alone cause no biological damage, while immediate cell damage occurs when heating for 10 s at temperatures exceeding 45 °C. CONCLUSIONS This method shows great potential not only as a noninvasive, non-contact method to determine temperature/time responses of cells in culture, but also for complex tissue and other materials.
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Affiliation(s)
- Yoko Miura
- a Medical Laser Center Lübeck , Lübeck , Germany.,b Institute of Biomedical Optics , University of Lübeck , Lübeck , Germany.,c Department of Ophthalmology , University Hospital Schleswig-Holstein , Campus Lübeck, Lübeck , Germany
| | - Eric Seifert
- a Medical Laser Center Lübeck , Lübeck , Germany
| | - Josua Rehra
- a Medical Laser Center Lübeck , Lübeck , Germany
| | | | | | - Michael Denton
- d 711th Human Performance Wing, Airman Systems Directorate, Bioeffects Division, Optic Radiation Bioeffects Branch , JBSA , Fort Sam Houston , TX , USA
| | - Ralf Brinkmann
- a Medical Laser Center Lübeck , Lübeck , Germany.,b Institute of Biomedical Optics , University of Lübeck , Lübeck , Germany
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Meng L, Deschaume O, Larbanoix L, Fron E, Bartic C, Laurent S, Van der Auweraer M, Glorieux C. Photoacoustic temperature imaging based on multi-wavelength excitation. PHOTOACOUSTICS 2019; 13:33-45. [PMID: 30555785 PMCID: PMC6277227 DOI: 10.1016/j.pacs.2018.11.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Revised: 10/29/2018] [Accepted: 11/15/2018] [Indexed: 05/04/2023]
Abstract
Building further upon the high spatial resolution offered by ultrasonic imaging and the high optical contrast yielded by laser excitation of photoacoustic imaging, and exploiting the temperature dependence of photoacoustic signal amplitudes, this paper addresses the question whether the rich information given by multispectral optoacoustic tomography (MSOT) allows to obtain 3D temperature images. Numerical simulations and experimental results are reported on agarose phantoms containing gold nanoparticles and the effects of shadowing, reconstruction flaws, etc. on the accuracy are determined.
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Affiliation(s)
- Lei Meng
- Soft Matter and Biophysics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D - box 2416, 3001 Leuven, Belgium
| | - Olivier Deschaume
- Soft Matter and Biophysics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D - box 2416, 3001 Leuven, Belgium
| | - Lionel Larbanoix
- Center for Microscopy and Molecular Imaging, Rue Adrienne Bolland 8, B-6041, Gosselies, Belgium
| | - Eduard Fron
- Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F - box 2404, 3001 Leuven, Belgium
| | - Carmen Bartic
- Soft Matter and Biophysics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D - box 2416, 3001 Leuven, Belgium
| | - Sophie Laurent
- Center for Microscopy and Molecular Imaging, Rue Adrienne Bolland 8, B-6041, Gosselies, Belgium
| | - Mark Van der Auweraer
- Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F - box 2404, 3001 Leuven, Belgium
| | - Christ Glorieux
- Soft Matter and Biophysics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D - box 2416, 3001 Leuven, Belgium
- Corresponding author.
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ZHOU YUAN, LI MUCONG, LIU WEI, SANKIN GEORGY, LUO JIANWEN, ZHONG PEI, YAO JUNJIE. Thermal Memory Based Photoacoustic Imaging of Temperature. OPTICA 2019; 6:198-205. [PMID: 31286029 PMCID: PMC6613656 DOI: 10.1364/optica.6.000198] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 01/18/2019] [Indexed: 05/05/2023]
Abstract
Temperature mapping is essential in many biomedical studies and interventions to precisely control the tissue's thermal conditions for optimal treatment efficiency and minimal side effects. Based on the Grüneisen parameter's temperature dependence, photoacoustic (PA) imaging can provide relative temperature measurement, but it has been traditionally challenging to measure absolute temperatures without knowing the baseline temperature, especially in deep tissues with unknown optical and acoustic properties. Here, we report a new thermal-energy-memory-based photoacoustic thermometry (TEMPT). By illuminating the tissue with a burst of nanosecond laser pulses, TEMPT exploits the temperature dependence of the thermal energy lingering, which is probed by the corresponding PA signals acquired within the thermal confinement. A self-normalized ratiometric measurement cancels out temperature-irrelevant quantities and estimates the Grüneisen parameter. The temperature can then be evaluated, given the tissue's temperature-dependent Grüneisen parameter, mass density, and specific heat capacity. Unlike the conventional PA thermometry, TEMPT does not require the knowledge of tissue's baseline temperature, nor the optical properties. We have developed a mathematical model to describe the temperature dependence in TEMPT. We have demonstrated the feasibility of the temperature evaluation on tissue phantoms at 1.5 cm depth within a clinically relevant temperature range. Finally, as proof-of-concept, we applied TEMPT for temperature mapping during focused ultrasound treatment in mice in vivo at 2 mm depth. As a generic temperature mapping method, TEMPT is expected to find applications in thermotherapy of cancers on small animal models.
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Affiliation(s)
- YUAN ZHOU
- Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - MUCONG LI
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - WEI LIU
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - GEORGY SANKIN
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - JIANWEN LUO
- Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China
| | - PEI ZHONG
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - JUNJIE YAO
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
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Petrova EV, Brecht HP, Motamedi M, Oraevsky AA, Ermilov SA. In vivo optoacoustic temperature imaging for image-guided cryotherapy of prostate cancer. Phys Med Biol 2018; 63:064002. [PMID: 29480808 DOI: 10.1088/1361-6560/aab241] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The objective of this study is to demonstrate in vivo the feasibility of optoacoustic temperature imaging during cryotherapy of prostate cancer. We developed a preclinical prototype optoacoustic temperature imager that included pulsed optical excitation at a wavelength of 805 nm, a modified clinical transrectal ultrasound probe, a parallel data acquisition system, image processing and visualization software. Cryotherapy of a canine prostate was performed in vivo using a commercial clinical system, Cryocare® CS, with an integrated ultrasound imaging. The universal temperature-dependent optoacoustic response of blood was employed to convert reconstructed optoacoustic images to temperature maps. Optoacoustic imaging of temperature during prostate cryotherapy was performed in the longitudinal view over a region of 30 mm (long) × 10 mm (deep) that covered the rectum, the Denonvilliers fascia, and the posterior portion of the treated gland. The transrectal optoacoustic images showed high-contrast vascularized regions, which were used for quantitative estimation of local temperature profiles. The constructed temperature maps and their temporal dynamics were consistent with the arrangement of the cryoprobe and readouts of the thermal needle sensors. The temporal profiles of the readouts from the thermal needle sensors and the temporal profile estimated from the normalized optoacoustic intensity of the selected vascularized region showed significant resemblance, except for the initial overshoot, that may be explained as a result of the physiological thermoregulatory compensation. The temperature was mapped with errors not exceeding ±2 °C (standard deviation) consistent with the clinical requirements for monitoring cryotherapy of the prostate. In vivo results showed that the optoacoustic temperature imaging is a promising non-invasive technique for real-time imaging of tissue temperature during cryotherapy of prostate cancer, which can be combined with transrectal ultrasound-the current standard for guiding clinical cryotherapy procedure.
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Affiliation(s)
- E V Petrova
- Tomowave Laboratories, Inc., 6550 Mapleridge St, Ste 124, Houston, TX 77081-4629, United States of America. Present address: Department of Medicine, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX 77030, United States of America
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10
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Petrova E, Liopo A, Oraevsky AA, Ermilov SA. Temperature-dependent optoacoustic response and transient through zero Grüneisen parameter in optically contrasted media. PHOTOACOUSTICS 2017; 7:36-46. [PMID: 28725558 PMCID: PMC5501891 DOI: 10.1016/j.pacs.2017.06.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2016] [Revised: 06/11/2017] [Accepted: 06/21/2017] [Indexed: 05/10/2023]
Abstract
Non-invasive optoacoustic mapping of temperature in tissues with low blood content can be enabled by administering external contrast agents. Some important clinical applications of such approach include temperature mapping during thermal therapies in a prostate or a mammary gland. However, the technique would require a calibration that establishes functional relationship between the measured normalized optoacoustic response and local tissue temperature. In this work, we investigate how a key calibration parameter - the temperature of zero optoacoustic response (T0 ) - behaves in different environments simulating biological tissues augmented with either dissolved or particulate (nanoparticles) contrast agents. The observed behavior of T0 in ionic and molecular solutions suggests that in-vivo temperature mapping is feasible for contrast agents of this type, but requires knowledge of local concentrations. Oppositely, particulate contrast agents (plasmonic or carbon nanoparticles) demonstrated concentration-independent thermal behavior of optoacoustic response with T0 defined by the thermoelastic properties of the local environment.
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Key Words
- GNR, Gold nanorods
- MRI, Magnetic resonance imaging
- NIR, Near-infrared
- NP, Nanoparticles
- OA, Optoacoustic
- Optical contrast agents
- Optoacoustic imaging
- Photoacoustic
- ROI, Region of interest
- SNR, Signal-to-noise ratio
- SOS, Speed of sound
- Temperature monitoring
- ThOR, Thermal (temperature-dependent) optoacoustic response
- USI, Ultrasound imaging
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Sanders JL, Stephens DN, Oralkan O. Photoacoustic-imaging-based temperature monitoring for high-intensity focused ultrasound therapy. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2017; 2016:3235-3238. [PMID: 28268997 DOI: 10.1109/embc.2016.7591418] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Temperature monitoring during high-intensity focused ultrasound (HIFU) application is necessary to ensure effective therapy while minimizing thermal damage to adjacent tissue. In this study, we demonstrate a noninvasive approach for temperature measurement during HIFU therapy based on photoacoustic imaging (PAI). Because of the dependence of photoacoustic (PA) signal amplitude on temperature of the source tissue and the linearity of the PAI system, changes in temperature will cause changes in PA image intensity. Experiments have been conducted in ex-vivo bovine tissue to characterize the linear dependence of PA image pixel values on temperature and subsequently to convert the PA image to a real-time temperature map.
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Villanueva-Palero Y, Hondebrink E, Petersen W, Steenbergen W. Quantitative photoacoustic integrating sphere (QPAIS) platform for absorption coefficient and Grüneisen parameter measurements: Demonstration with human blood. PHOTOACOUSTICS 2017; 6:9-15. [PMID: 28417067 PMCID: PMC5388938 DOI: 10.1016/j.pacs.2017.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 02/24/2017] [Accepted: 03/18/2017] [Indexed: 06/07/2023]
Abstract
Quantitative photoacoustic imaging in biomedicine relies on accurate measurements of relevant material properties of target absorbers. Here, we present a method for simultaneous measurements of the absorption coefficient and Grüneisen parameter of small volume of liquid scattering and absorbing media using a coupled-integrating sphere system which we refer to as quantitative photoacoustic integrating sphere (QPAIS) platform. The derived equations do not require absolute magnitudes of optical energy and pressure values, only calibration of the setup using aqueous ink dilutions is necessary. As a demonstration, measurements with blood samples from various human donors are done at room and body temperatures using an incubator. Measured absorption coefficient values are consistent with known oxygen saturation dependence of blood absorption at 750 nm, whereas measured Grüneisen parameter values indicate variability among five different donors. An increasing Grüneisen parameter value with both hematocrit and temperature is observed. These observations are consistent with those reported in literature.
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Affiliation(s)
| | | | | | - Wiendelt Steenbergen
- Biomedical Photonic Imaging Group, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
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Longo DL, Stefania R, Callari C, De Rose F, Rolle R, Conti L, Consolino L, Arena F, Aime S. Water Soluble Melanin Derivatives for Dynamic Contrast Enhanced Photoacoustic Imaging of Tumor Vasculature and Response to Antiangiogenic Therapy. Adv Healthc Mater 2017; 6. [PMID: 27782375 DOI: 10.1002/adhm.201600550] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 08/22/2016] [Indexed: 12/17/2022]
Abstract
A dynamic contrast enhanced (DCE) approach for tumor photoacoustic (PA) imaging is described. Novel water soluble melanin-based derivatives are synthesized that exhibit good PA properties, stability, safety and accumulation in tumor bearing mice. This melanin derivative is capable to characterize tumor vasculature and to monitor vessel permeability changes upon antiangiogenic treatment. DCE-PA imaging can assess functional response to cancer treatments.
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Affiliation(s)
- Dario L. Longo
- Institute of Biostructure and Bioimaging (CNR) c/o Molecular Biotechnology Center; Via Nizza 52 10126 Torino Italy
| | - Rachele Stefania
- Department of Molecular Biotechnology and Health Sciences; University of Torino; Via Nizza 52 10126 Torino Italy
| | - Chiara Callari
- Department of Molecular Biotechnology and Health Sciences; University of Torino; Via Nizza 52 10126 Torino Italy
| | - Francesco De Rose
- Department of Molecular Biotechnology and Health Sciences; University of Torino; Via Nizza 52 10126 Torino Italy
| | - Riccardo Rolle
- Department of Molecular Biotechnology and Health Sciences; University of Torino; Via Nizza 52 10126 Torino Italy
| | - Laura Conti
- Department of Molecular Biotechnology and Health Sciences; University of Torino; Via Nizza 52 10126 Torino Italy
| | - Lorena Consolino
- Department of Molecular Biotechnology and Health Sciences; University of Torino; Via Nizza 52 10126 Torino Italy
| | - Francesca Arena
- Department of Molecular Biotechnology and Health Sciences; University of Torino; Via Nizza 52 10126 Torino Italy
| | - Silvio Aime
- Department of Molecular Biotechnology and Health Sciences; University of Torino; Via Nizza 52 10126 Torino Italy
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14
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Petrova E, Liopo A, Nadvoretskiy V, Ermilov S. Imaging technique for real-time temperature monitoring during cryotherapy of lesions. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:116007. [PMID: 27822579 PMCID: PMC5112333 DOI: 10.1117/1.jbo.21.11.116007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 10/10/2016] [Indexed: 05/22/2023]
Abstract
Noninvasive real-time temperature imaging during thermal therapies is able to significantly improve clinical outcomes. An optoacoustic (OA) temperature monitoring method is proposed for noninvasive real-time thermometry of vascularized tissue during cryotherapy. The universal temperature-dependent optoacoustic response (ThOR) of red blood cells (RBCs) is employed to convert reconstructed OA images to temperature maps. To obtain the temperature calibration curve for intensity-normalized OA images, we measured ThOR of 10 porcine blood samples in the range of temperatures from 40°C to ?16°C and analyzed the data for single measurement variations. The nonlinearity (?Tmax) and the temperature of zero OA response (T0) of the calibration curve were found equal to 11.4±0.1°C and ?13.8±0.1°C, respectively. The morphology of RBCs was examined before and after the data collection confirming cellular integrity and intracellular compartmentalization of hemoglobin. For temperatures below 0°C, which are of particular interest for cryotherapy, the accuracy of a single temperature measurement was ±1°C, which is consistent with the clinical requirements. Validation of the proposed OA temperature imaging technique was performed for slow and fast cooling of blood samples embedded in tissue-mimicking phantoms.
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Affiliation(s)
- Elena Petrova
- Tomowave Laboratories, Inc., 6550 Mapleridge Street, Suite 124, Houston, Texas 77081-4629, United States
- Address all correspondence to: Elena Petrova, E-mail:
| | - Anton Liopo
- Tomowave Laboratories, Inc., 6550 Mapleridge Street, Suite 124, Houston, Texas 77081-4629, United States
- Pinami, LLC, 10718 Silkwood Drive, Houston, Texas 77031, United States
| | - Vyacheslav Nadvoretskiy
- Tomowave Laboratories, Inc., 6550 Mapleridge Street, Suite 124, Houston, Texas 77081-4629, United States
| | - Sergey Ermilov
- Tomowave Laboratories, Inc., 6550 Mapleridge Street, Suite 124, Houston, Texas 77081-4629, United States
- PhotoSound Technologies, Inc., 5658 Sylmar Street, Houston, Texas 77081, United States
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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.
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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
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16
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Petrova EV, Oraevsky AA, Ermilov SA. Red blood cell as a universal optoacoustic sensor for non-invasive temperature monitoring. APPLIED PHYSICS LETTERS 2014; 105:094103. [PMID: 25316928 PMCID: PMC4162524 DOI: 10.1063/1.4894635] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 08/22/2014] [Indexed: 05/11/2023]
Abstract
Optoacoustic (photoacoustic) temperature imaging could provide improved spatial resolution and temperature sensitivity as compared to other techniques of non-invasive thermometry used during thermal therapies for safe and efficient treatment of lesions. However, accuracy of the reported optoacoustic methods is compromised by biological variability and heterogeneous composition of tissues. We report our findings on the universal character of the normalized temperature dependent optoacoustic response (ThOR) in blood, which is invariant with respect to hematocrit at the isosbestic point of hemoglobin. The phenomenon is caused by the unique homeostatic compartmentalization of blood hemoglobin exclusively inside erythrocytes. On the contrary, the normalized ThOR in aqueous solutions of hemoglobin showed linear variation with respect to its concentration and was identical to that of blood when extrapolated to the hemoglobin concentration inside erythrocytes. To substantiate the conclusions, we analyzed optoacoustic images acquired from the samples of whole and diluted blood as well as hemoglobin solutions during gradual cooling from +37 to -15 °C. Our experimental methodology allowed direct observation and accurate measurement of the temperature of zero optoacoustic response, manifested as the sample's image faded into background and then reappeared in the reversed (negative) contrast. These findings provide a framework necessary for accurate correlation of measured normalized optoacoustic image intensity and local temperature in vascularized tissues independent of tissue composition.
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Affiliation(s)
- Elena V Petrova
- TomoWave Laboratories, Inc. , 6550 Mapleridge St., Suite 124, Houston, Texas 77081-4629, USA
| | - Alexander A Oraevsky
- TomoWave Laboratories, Inc. , 6550 Mapleridge St., Suite 124, Houston, Texas 77081-4629, USA
| | - Sergey A Ermilov
- TomoWave Laboratories, Inc. , 6550 Mapleridge St., Suite 124, Houston, Texas 77081-4629, USA
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