Dr. Karl Kratkiewicz Profile

Dr. Karl Kratkiewicz

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Publications (9)

Proceedings Article | 11 March 2021 Poster + Paper

Study the effect of the skull in light illumination and ultrasound detection paths in transcranial photoacoustic imaging

Rayyan Manwar, Karl Kratkiewicz, Mohammad Reza Nasiri Avanaki

Proceedings Volume 11642, 116424P (2021) https://doi.org/10.1117/12.2581241

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Proceedings Article | 5 March 2021 Poster

Wavelength optimization for quantification of hypoxia in photoacoustic imaging

Sadreddin Mahmoodkalayeh, Rayyan Manwar, Karl Kratkiewicz, Meysam Shahbazi, Mohammad Ansari, Girija Natarajan, Eishi Asano, Kamran Avanaki

Proceedings Volume 11642, 116424O (2021) https://doi.org/10.1117/12.2581249

KEYWORDS: Hypoxia, Photoacoustic imaging, Photoacoustic spectroscopy, Neuroimaging, Brain, Tissues, Spectroscopy, Oxygen, Optical properties, Neurological disorders

Proceedings Article | 5 March 2021 Poster

A simulation study on co-planar mutually guided photoacoustic and diffuse optical tomography

Sadreddin Mahmoodkalayeh, Mehrdad Zarei, Mohammad Ali Ansari, Karl Kratkiewicz, Mohsen Ranjbaran, Rayyan Manwar, Kamran Avanaki

Proceedings Volume 11642, 116423X (2021) https://doi.org/10.1117/12.2581235

KEYWORDS: Acquisition tracking and pointing, Photoacoustic spectroscopy, Diffuse optical tomography, Tissues, Tissue optics, Absorption, Functional imaging, Scattering, Photoacoustic tomography, Optical testing

Proceedings Article | 5 March 2021 Presentation + Paper

Photoacoustic imaging of fear conditioning neuronal ensembles using a Fos-LacZ gene reporter system in the rat brain in vivo after intrathecal X-gal injection

James Matchynski, Rayyan Manwar, Karl Kratkiewicz, Rajtarun Madangopal, Veronica Lennon, Kassem Makki, Bruce Hope, Alana Conti, Shane Perrine, Kamran Avanaki

Proceedings Volume 11629, 116292E (2021) https://doi.org/10.1117/12.2579526

KEYWORDS: In vivo imaging, Neurons, Imaging systems, Neuroimaging, Brain, Photoacoustic imaging, Prefrontal cortex, Photoacoustic spectroscopy, Image resolution, Image analysis

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Proceedings Article | 6 March 2019 Paper

Photoacoustic signal enhancement using a novel adaptive filtering algorithm

Mohsin Zafar, Rayyan Manwar, Karl Kratkiewicz, Matin Hosseinzadeh, Ali Hariri, Shahryar Noei, Mohammad Avanaki

Proceedings Volume 10878, 108785S (2019) https://doi.org/10.1117/12.2510557

KEYWORDS: Signal to noise ratio, Interference (communication), Electronic filtering, Digital filtering, Transducers, Photoacoustic spectroscopy, Denoising, Tissues, Signal detection, Data acquisition

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Proceedings Article | 6 March 2019 Paper

Numerical study on tumor volume detection in the human brain using photoacoustic tomography

Sayyed Ranjbaran, Karl Kratkiewicz, Rayyan Manwar, Hamidreza Fallah, Morteza Hajimahmoodzadeh, Mohammad Reza Nasiri Avanaki

Proceedings Volume 10878, 108785P (2019) https://doi.org/10.1117/12.2510572

KEYWORDS: Head, Monte Carlo methods, Tissue optics, Brain, Optical design, Reconstruction algorithms, Acoustics, Optical fibers, Absorbance, Photoacoustic tomography

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Proceedings Article | 6 March 2019 Paper

Simultaneous photoacoustic tomography guided diffuse optical tomography: a numerical study

Mehrdad Zarei, Sadreddin Mahmoodkalayeh, Mohammad Ali Ansari, Karl Kratkiewicz, Rayyan Manwar, M. R. Nasiriavanaki

Proceedings Volume 10878, 108785U (2019) https://doi.org/10.1117/12.2510554

KEYWORDS: Signal detection, Absorption, Photoacoustic tomography, Optical fibers, Diffuse optical tomography, Transducers, Image restoration, Tissue optics, Tissues, Spatial resolution

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Proceedings Article | 5 March 2019 Paper

Low-cost fast photoacoustic computed tomography: phantom study

Mohsin Zafar, Karl Kratkiewicz, Rayyan Manwar, Mohammad Avanaki

Proceedings Volume 10878, 108785V (2019) https://doi.org/10.1117/12.2510552

KEYWORDS: Transducers, Imaging systems, Photoacoustic tomography, Ultrasonography, Data acquisition, Image resolution, Lead, Tissues, Tissue optics, Signal detection

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SPIE Journal Paper | 6 February 2018 Open Access

Linear-array photoacoustic imaging using minimum variance-based delay multiply and sum adaptive beamforming algorithm

Moein Mozaffarzadeh, Ali Mahloojifar, Mahdi Orooji, Karl Kratkiewicz, Saba Adabi, Mohammadreza Nasiriavanaki

JBO, Vol. 23, Issue 02, 026002, (February 2018) https://doi.org/10.1117/12.10.1117/1.JBO.23.2.026002

KEYWORDS: Phased arrays, Signal detection, Signal to noise ratio, Photoacoustic imaging, Image resolution, Transducers, Mendelevium, Reconstruction algorithms, Detection and tracking algorithms, Interference (communication)

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