Dr. Lukasz Dziuda Profile

Dr. Lukasz Dziuda

Associate Professor at Military Institute of Aviation Medicine

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Publications (4)

Proceedings Article | 23 May 2018 Presentation

Noninvasive optoelectronic system for monitoring of the heart and respiratory rate of the patient exposed to MRI scanning (Conference Presentation)

Stanisław Stopiński, Anna Jusza, Krzysztof Anders, Andrzej Kaźmierczak, Konrad Markowski, Tomasz Osuch, Mariusz Krej, Lukasz Dziuda, Paweł Szczepański, Ryszard Piramidowicz

Proceedings Volume 10680, 106800T (2018) https://doi.org/10.1117/12.2307594

KEYWORDS: Magnetic resonance imaging, Optoelectronics, Heart, Fiber Bragg gratings, Magnetism, Sensors, Photonic integrated circuits, Diagnostics, Medicine, Optical sensing

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The magnetic resonance imaging (MRI) technique is a powerful diagnostic tool which is nowadays commonly used in many fields of medicine. In some cases, especially of the patients of intensive care units, it is highly recommended or even necessary to provide continuous monitoring of basic physiologic parameters, mainly the heart rate and the respiratory rate, during the MRI scan procedure. The presence of a strong magnetic field within the MRI chamber requires application of non-standard devices and solutions. The monitoring system needs to be immune to the strong magnetic field and simultaneously cannot negatively influence on the results of the scan. Therefore, application of optical sensing technologies could be potentially advantageous to fulfil these requirements. In this work we propose a novel optoelectronic measurement system, dedicated to monitoring of the patient during an MRI scan, immune to strong magnetic field and compatible with the MRI apparatus. Fiber Bragg gratings (FBGs) are used as the sensing elements – the strain induced by the patient’s respiration and cardiac activity cause a change of the Bragg wavelength. These changes can be accurately measured and monitored in the time domain. The respiratory and heart rate can be extracted by further processing of the measured signal by dedicated software. The gratings are organized in a network to maximize the effective sensing area. Each of the FBGs has a different Bragg wavelength so that they can be connected in series. The information from the sensors is read out using an interrogator based on an application specific photonic integrated circuit (ASPIC), designed and fabricated in an InP-based generic integration technology. The interrogator comprises a 36-channel arrayed waveguide grating wavelength demultiplexer, which outputs are connected to PIN photodiodes. Such a photonic circuit acts as a spectrometer and allows to reconstruct the reflection spectrum of many gratings simultaneously. An external superluminescent LED is used as the light source, however in the target configuration the source could be monolithically integrated with the interrogator. The Bragg gratings, the interrogator and the SLED are connected with each other using an optical circulator. Initial tests of the monitoring system have been performed using a single fiber Bragg grating as the strain sensor and a commercially available optoelectronic interrogator. The fiber with an inscribed FBG was mounted using an epoxy glue on a PMMA board and deployed under the patient. Two signals can be distinguished out of the measured waves. The first one, with strong and slowly-varying peaks, reflects the respiration of the patient. The second signal, characterized by low-intensity and fast-varying peaks is a result of the cardiac activity. No influence of the magnetic field of the MRI instrument on the sensing system has been observed. The first results have confirmed both the correctness of the approach and the applicability of the system to monitoring the patient’s physical condition during MRI diagnosis. This work was supported by the National Centre for Research and Development, project OPTO-SPARE, grant agreement PBS3/B9/41/2015.

SPIE Journal Paper | 16 January 2015 Open Access

Fiber-optic sensors for monitoring patient physiological parameters: a review of applicable technologies and relevance to use during magnetic resonance imaging procedures

Łukasz Dziuda

JBO, Vol. 20, Issue 01, 010901, (January 2015) https://doi.org/10.1117/12.10.1117/1.JBO.20.1.010901

KEYWORDS: Sensors, Fiber Bragg gratings, Fiber optics sensors, Magnetic resonance imaging, Heart, Optical fibers, Environmental sensing, Magnetic sensors, Phase only filters, Fiber optics

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SPIE Journal Paper | 22 May 2013 Open Access

Fiber Bragg grating-based sensor for monitoring respiration and heart activity during magnetic resonance imaging examinations

Lukasz Dziuda, Franciszek Skibniewski, Mariusz Krej, Paulina Baran

JBO, Vol. 18, Issue 05, 057006, (May 2013) https://doi.org/10.1117/12.10.1117/1.JBO.18.5.057006

KEYWORDS: Sensors, Magnetic resonance imaging, Heart, Fiber Bragg gratings, Fiber optics sensors, Signal processing, Beam propagation method, Error analysis, Environmental sensing, Magnetic sensors

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Proceedings Article | 16 February 2011 Paper

Using modalmetric fiber optic sensors to monitor the activity of the heart

M. Życzkowski, B. Uzięblo-Zyczkowska, L. Dziuda, K. Różanowski

Proceedings Volume 7894, 789404 (2011) https://doi.org/10.1117/12.873379

KEYWORDS: Fiber optics sensors, Sensors, Heart, Fiber optics, Signal processing, Structured optical fibers, Signal detection, Optical fibers, Electrocardiography, Standards development

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