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Optoacoustic determination of spatio-temporal responses of ultrasound sensors.
Caballero MA, Rosenthal A, Buehler A, Razansky D, Ntziachristos V. Caballero MA, et al. IEEE Trans Ultrason Ferroelectr Freq Control. 2013 Jun;60(6):1234-44. doi: 10.1109/TUFFC.2013.2687. IEEE Trans Ultrason Ferroelectr Freq Control. 2013. PMID: 25004487
In this work, we developed a hybrid method for the characterization of the spatially dependent response of ultrasound detectors. ...
In this work, we developed a hybrid method for the characterization of the spatially dependent response of ultrasound detectors. ...
Ultrasound Detection Using Acoustic Apertures.
Hahamovich E, Rosenthal A. Hahamovich E, et al. IEEE Trans Ultrason Ferroelectr Freq Control. 2018 Jan;65(1):120-126. doi: 10.1109/TUFFC.2017.2773570. IEEE Trans Ultrason Ferroelectr Freq Control. 2018. PMID: 29283354
In this paper, we propose a simple, low-cost method to reconfigure the geometry of ultrasound transducers. The technique is based on using apertures in thin sheets of acoustic blockers. We experimentally demonstrate this method for an ultrasound transducer with a ce …
In this paper, we propose a simple, low-cost method to reconfigure the geometry of ultrasound transducers. The technique is based on …
Analysis of Negatively Focused Ultrasound Detectors in Optoacoustic Tomography.
Drozdov G, Rosenthal A. Drozdov G, et al. IEEE Trans Med Imaging. 2017 Jan;36(1):301-309. doi: 10.1109/TMI.2016.2606482. Epub 2016 Sep 7. IEEE Trans Med Imaging. 2017. PMID: 27623574
In optoacoustic tomography, negatively focused transducers may be used for improving the tangential image resolution while preserving a high signal-to-noise ratio. ...
In optoacoustic tomography, negatively focused transducers may be used for improving the tangential image resolution while preserving a
Optoacoustic methods for frequency calibration of ultrasonic sensors.
Rosenthal A, Ntziachristos V, Razansky D. Rosenthal A, et al. IEEE Trans Ultrason Ferroelectr Freq Control. 2011 Feb;58(2):316-26. doi: 10.1109/TUFFC.2011.1809. IEEE Trans Ultrason Ferroelectr Freq Control. 2011. PMID: 21342817
Although these two distinct sensitivity characteristics are interchangeable in the case of a flat detector and a point source at infinity, it is not the case for detectors with size considerably larger than the acoustic wavelength of interest or those having a
Although these two distinct sensitivity characteristics are interchangeable in the case of a flat detector and a point source …
The Impulse Response of Negatively Focused Spherical Ultrasound Detectors and Its Effect on Tomographic Optoacoustic Reconstruction.
Drozdov G, Levi A, Rosenthal A. Drozdov G, et al. IEEE Trans Med Imaging. 2019 Oct;38(10):2326-2337. doi: 10.1109/TMI.2019.2897588. Epub 2019 Feb 5. IEEE Trans Med Imaging. 2019. PMID: 30735988
Since no exact inversion formulas exist for optoacoustic image reconstruction with negatively focused detectors, image reconstruction in such cases is based on using the virtual-detector approximation, in which it is assumed that the response of the negatively focused detector is …
Since no exact inversion formulas exist for optoacoustic image reconstruction with negatively focused detectors, image reconstruction in suc …
Multiscale multispectral optoacoustic tomography by a stationary wavelet transform prior to unmixing.
Taruttis A, Rosenthal A, Kacprowicz M, Burton NC, Ntziachristos V. Taruttis A, et al. IEEE Trans Med Imaging. 2014 May;33(5):1194-202. doi: 10.1109/TMI.2014.2308578. IEEE Trans Med Imaging. 2014. PMID: 24770922
Multispectral optoacoustic tomography (MSOT) utilizes broadband ultrasound detection for imaging biologically-relevant optical absorption features at a range of scales. ...In response, we employ a wavelet decomposition to perform spectral unmixing on a per-sc …
Multispectral optoacoustic tomography (MSOT) utilizes broadband ultrasound detection for imaging biologically-relevant optical absorption fe …
High-Throughput Sparsity-Based Inversion Scheme for Optoacoustic Tomography.
Lutzweiler C, Tzoumas S, Rosenthal A, Ntziachristos V, Razansky D. Lutzweiler C, et al. IEEE Trans Med Imaging. 2016 Feb;35(2):674-84. doi: 10.1109/TMI.2015.2490799. Epub 2015 Oct 14. IEEE Trans Med Imaging. 2016. PMID: 26469127
The sparsity-based inversion scheme was tested with experimental data, offering reconstruction speed enhancement by a factor of 40 to 700 times as compared with the conventional iterative model-based inversions while preserving similar image quality. ...
The sparsity-based inversion scheme was tested with experimental data, offering reconstruction speed enhancement by a factor of 40 to …
Quantitative optoacoustic signal extraction using sparse signal representation.
Rosenthal A, Razansky D, Ntziachristos V. Rosenthal A, et al. IEEE Trans Med Imaging. 2009 Dec;28(12):1997-2006. doi: 10.1109/TMI.2009.2027116. Epub 2009 Jul 21. IEEE Trans Med Imaging. 2009. PMID: 19628454
We report on a new quantification methodology of optoacoustic tomographic reconstructions under heterogeneous illumination conditions representative of realistic whole-body imaging scenarios. ...
We report on a new quantification methodology of optoacoustic tomographic reconstructions under heterogeneous illumination conditions …
Characterization of the spatio-temporal response of optical fiber sensors to incident spherical waves.
Veres IA, Burgholzer P, Berer T, Rosenthal A, Wissmeyer G, Ntziachristos V. Veres IA, et al. J Acoust Soc Am. 2014 Apr;135(4):1853-62. doi: 10.1121/1.4868391. J Acoust Soc Am. 2014. PMID: 25234984
In this study a theoretical framework for calculating the acoustic response of optical fiber-based ultrasound sensors is presented. ...The theoretical results are compared to experimental data obtained with a sensing element based on a pi-phase-shifted fiber …
In this study a theoretical framework for calculating the acoustic response of optical fiber-based ultrasound sensors is presented. . …
Fast semi-analytical model-based acoustic inversion for quantitative optoacoustic tomography.
Rosenthal A, Razansky D, Ntziachristos V. Rosenthal A, et al. IEEE Trans Med Imaging. 2010 Jun;29(6):1275-85. doi: 10.1109/TMI.2010.2044584. Epub 2010 Mar 18. IEEE Trans Med Imaging. 2010. PMID: 20304725
We present a fast model-based inversion algorithm for quantitative 2-D and 3-D optoacoustic tomography. The algorithm is based on an accurate and efficient forward model, which eliminates the need for regularization in the inversion process while providing modeling flexibi …
We present a fast model-based inversion algorithm for quantitative 2-D and 3-D optoacoustic tomography. The algorithm is based on an …
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