Partner: Karol Malinowski

Institute of Plasma Physics and Laser Microfusion (PL)

Recent publications
1.Dolega-Dolegowski D., Dolega-Dolegowska M., Pręgowska A., Malinowski K., Proniewska K., The Application of Mixed Reality in Root Canal Treatment, Applied Sciences, ISSN: 2076-3417, DOI: 10.3390/app13074078, Vol.13(7), No.4078, pp.1-18, 2023
Abstract:

The priority of modern dentistry is to keep patients’ teeth for as long as possible. Tooth extraction is a procedure performed as a last resort when conservative methods and endodontic surgery procedures have not brought the expected results. As a consequence, the number of patients in dental offices, who require first and repeated endodontic treatment, is increasing. Thus, the development of new technologies in the medical industry, including microscopy, computer tomography (CT), as well as diode and neodymium-YAG-erbium lasers, enables dentists to increase the percentage of successful treatments. Moreover, mixed reality (MR) is a very new technology, in which the 3D view can help plan or simulate various types of tasks before they will be carried out in real life. In dentistry, 3D holography can be applied to display CT data to plan endodontic treatment. The most important element in effective root canal treatment is the precise imaging of the root canal. The CT scans allow dentists to view the anatomy of the patient’s tooth with much higher precision and understanding than using 2D radiography (RTG-radiographic photo) pictures. Recently, the development of new 3D technologies allows dentists to obtain even more data from existing CT scans. In this paper, the CT scan data were applied to generate patient teeth in 3D and simulate the view of the root canal’s anatomy in MR devices, i.e., Microsoft HoloLens 2. Using DICOM RAW data from the CT exam, we generated a 3D model of the jaw with a tooth. In the next step, the crown of the tooth was removed in a similar way to how a dentist would do this using a dental handpiece. Furthermore, all root canals were cleaned of everything inside. This way we achieved empty tunnels, namely root canals. Finally, we added appropriate lighting, similar to the type of lighting that dentists use. The proposed approach enables to display of the root canals in the same way as during the endodontic procedure using a microscope. It allows for the visualization of the root canal and changing its direction, in which dimensional accuracy is crucial. It turns out that mixed reality can be considered a complementary method to the traditional approach, which reduces the amount of time for the root canal treatment procedure by up to 72.25%, depending on the complexity of the case, and increases its effectiveness. Thus, the mixed reality-based system can be considered an effective tool for planning dental treatment.

Keywords:

3D holography,root canal treatment,tooth,augmented reality,mixed reality

Affiliations:
Dolega-Dolegowski D.-Jagiellonian University (PL)
Dolega-Dolegowska M.-other affiliation
Pręgowska A.-IPPT PAN
Malinowski K.-Institute of Plasma Physics and Laser Microfusion (PL)
Proniewska K.-Jagiellonian University (PL)
2.Chernyshova M., Malinowski K., Jablonski S., Melikhov Y., Wojenski A., Kasprowicz G., Fornal T., Imrisek M., Jaulmes F., Weinzettl V., 2D GEM-based SXR imaging diagnostics for plasma radiation: Preliminary design and simulations, Nuclear Materials and Energy, ISSN: 2352-1791, DOI: 10.1016/j.nme.2022.101306, Vol.33, pp.101306-1-7, 2022
Abstract:

The purpose of this research is to design and construct a plasma radiation imaging system for fusion devices which is focused on soft X-ray region from about 2 to 15 keV photon energy. The proposed 2D diagnostic system, as opposed to conventional 1D systems, is expected to benefit from tangential field of view and to deliver new data for toroidal phenomena observations. This contribution relates to the introductory development of such 2D system laying out details on the overall design of the detecting unit (based on GEM technology) as well as on its acquisition module. The results cover also the expected photon flux and spectra foreseen for COMPASS-U device, as a first choice for testing and verification. Considerations on working medium and internal structure of the detecting sensor are presented including electrodes configurations and collecting electrode pattern. The preliminary establishments for data acquisition system are presented as well.

Keywords:

Plasma physics, Plasma radiation diagnostics, SXR imaging detector, Micropattern gaseous detectors (MSGC; GEM; THGEM; RETHGEM; MHSP; MICROPIC, MICROMEGAS; InGrid; etc.), Gas electron multiplier, Detector simulations

Affiliations:
Chernyshova M.-Institute of Plasma Physics and Laser Microfusion (PL)
Malinowski K.-Institute of Plasma Physics and Laser Microfusion (PL)
Jablonski S.-other affiliation
Melikhov Y.-IPPT PAN
Wojenski A.-other affiliation
Kasprowicz G.-Warsaw University of Technology (PL)
Fornal T.-other affiliation
Imrisek M.-other affiliation
Jaulmes F.-other affiliation
Weinzettl V.-other affiliation
3.Chernyshova M., Malinowski K., Jabłoński S., Casiraghi I., Demchenko I.N., Melikhov Y., Development of 2D GEM-based SXR plasma imaging for DTT device: focus on readout structure, Fusion Engineering and Design, ISSN: 0920-3796, DOI: 10.1016/j.fusengdes.2021.112443, Vol.169, pp.112443-1-12, 2021
Abstract:

Creation and development of a new diagnostics useful for future thermonuclear reactors and helpful in studying impurity profiles, MHD modes/localization, and imaging are among urgent tasks in plasma research field. Global SXR imaging for DTT device in support of power exhaust programme and its consecutive impact for plasma core is an example of applicability of such diagnostics. This contribution presents the results of the ongoing development of the elaborated plasma X-ray imaging technology focusing on the design of the relevant structure of readout electrode. In order to achieve that, the details on the expected plasma radiation for the selected scenario for DTT machine were assessed. Then, the spatial distribution of plasma radiation intensity flux that will be reaching the detector window of the GEM based detector was simulated. Taking it into account along with the physical properties of the detector, the spatial and temporal distributions of charge cloud that will be reaching the readout plane were evaluated. The special design of the readout structure has been proposed that fulfil critical conditions originated from technological and physical constraints. The final effectiveness of the GEM based detector was evaluated proving that such detector is well suited for an effective plasma radiation imaging.

Keywords:

X-ray detectors, GEM detector simulations, gas-electron multiplier (GEM) detector, SXR plasma imaging, DTT device

Affiliations:
Chernyshova M.-Institute of Plasma Physics and Laser Microfusion (PL)
Malinowski K.-Institute of Plasma Physics and Laser Microfusion (PL)
Jabłoński S.-Institute of Plasma Physics and Laser Microfusion (PL)
Casiraghi I.-other affiliation
Demchenko I.N.-Institute of Physics, Polish Academy of Sciences (PL)
Melikhov Y.-IPPT PAN
4.Chernyshova M., Malinowski K., Czarski T., Demchenko I.N., Melikhov Y., Kowalska-Strzęciwilk E., Wojeński A., Krawczyk R.D., Effect of charging-up and regular usage on performance of the triple GEM detector to be employed for plasma radiation monitoring, Fusion Engineering and Design, ISSN: 0920-3796, DOI: 10.1016/j.fusengdes.2020.111755, Vol.158, pp.111755-1-6, 2020
Abstract:

After the problem of high-temperature plasma confinement, construction of diagnostics that is able to identify plasma contamination with impurities and to determine impurity distribution is another critically important issue. Solution of this problem would enable progress towards the success in controlled thermonuclear fusion. A new diagnostics, based on Gas Electron Multiplier (GEM) technology, has been recently developed for poloidal tomography focused on radiation of the metal impurities by monitoring in Soft X-Ray (SXR) region. GEM based detectors would undergo much less damage by neutrons than standard semiconductor diodes which results in better operational stability. This paper emphasizes the results of the latest examination of this type of detectors, showing influence of the charging-up effect on the detector performance and its physical properties for expected plasma radiation intensity. In addition, an undesired influence of aging of the detector window's material on the performance of the GEM detector is also shown: regular (moderate or active) usage could lead to changes of material's morphology as well as its composition. This study confirms the importance of further research into material’s optimization of GEM detectors used as a base for SXR tomographic diagnostics aimed to work under different plasma radiation conditions.

Keywords:

nuclear instruments for hot plasma diagnostics, X-ray detectors, electron multipliers (gas), micropattern gaseous detectors, charging-up effect, detector window's material

Affiliations:
Chernyshova M.-Institute of Plasma Physics and Laser Microfusion (PL)
Malinowski K.-Institute of Plasma Physics and Laser Microfusion (PL)
Czarski T.-Institute of Plasma Physics and Laser Microfusion (PL)
Demchenko I.N.-Institute of Physics, Polish Academy of Sciences (PL)
Melikhov Y.-other affiliation
Kowalska-Strzęciwilk E.-Institute of Plasma Physics and Laser Microfusion (PL)
Wojeński A.-Warsaw University of Technology (PL)
Krawczyk R.D.-Warsaw University of Technology (PL)
5.Chernyshova M., Malinowski K., Czarski T., Kowalska-Strzęciwilk E., Linczuk P., Wojeński A., Krawczyk R.D., Melikhov Y., Advantages of Al based GEM detector aimed at plasma soft−semi hard X-ray radiation imaging, Fusion Engineering and Design, ISSN: 0920-3796, DOI: 10.1016/j.fusengdes.2019.01.153, Vol.146, pp.1039-1042, 2019
Abstract:

Development of gaseous detectors, more specifically Gas Electron Multiplier (GEM) based detectors, for application at tokamak plasma radiation monitoring/imaging in Soft−Semi Hard X-ray (S−SH) region is an ongoing research activity aiming to deliver valuable information on plasma shape, magnetic configuration, non-axisymmetry phenomena of the plasma, etc. Wide radiation range and brightness of plasma radiation impose some restrictions on choice of materials in the detecting chamber, as their interaction with the incident radiation may disrupt original signals. This work proposes usage of aluminum as GEM foils electrodes for the first time. The detector based on these foils was constructed and examined. The operational characteristics and spectral capabilities of such detector were compared with the ones based on the standard (commonly used) copper GEM foils. The laboratory tests were performed using X-ray tube and 55Fe sources to examine detectors' capabilities in energy-resolved imaging. Additionally, simulations of origin and number of the generated electrons, which determine the detector signal, were performed for Al and Cu GEM foils for a wide energy range of incident photons. The experimental and modelling data demonstrated that Cu based GEM detector produces higher parasitic signal than Al one necessitating total elimination of copper from detector's chamber.

Keywords:

nuclear instruments for hot plasma diagnostics, X-ray detectors, SXR imaging, electron multipliers (gas), micropattern gaseous detectors, aluminum GEM foils

Affiliations:
Chernyshova M.-Institute of Plasma Physics and Laser Microfusion (PL)
Malinowski K.-Institute of Plasma Physics and Laser Microfusion (PL)
Czarski T.-Institute of Plasma Physics and Laser Microfusion (PL)
Kowalska-Strzęciwilk E.-Institute of Plasma Physics and Laser Microfusion (PL)
Linczuk P.-Institute of Plasma Physics and Laser Microfusion (PL)
Wojeński A.-Warsaw University of Technology (PL)
Krawczyk R.D.-Warsaw University of Technology (PL)
Melikhov Y.-IPPT PAN
6.Chernyshova M., Malinowski K., Melikhov Y., Kowalska-Strzęciwilk E., Czarski T., Wojeński A., Linczuk P., Krawczyk R.D., Study of the optimal configuration for a Gas Electron Multiplier aimed at plasma impurity radiation monitoring, Fusion Engineering and Design, ISSN: 0920-3796, DOI: 10.1016/j.fusengdes.2018.03.031, Vol.136, pp.592-596, 2018
Abstract:

For the purpose of monitoring the level of plasma impurity (especially tungsten) and its distribution reconstruction at tokamaks (ITER in particular), a Soft X-Ray (SXR) tomographic diagnostics based on Gas Electron Multiplier (GEM) detectors with energy discrimination has been extensively considered for a while. Coupled with advanced electronics, GEM detectors offer excellent time and space resolution, as well as a charge spectrum from which the SXR photon spectrum can be deconvolved. In addition, they are less subjected to a neutron damage as compared to standard semiconductor diodes. This contribution highlights the latest studies supporting the development of such diagnostics focusing on laboratory tests to examine: (a) the impact of GEM holes geometry on the properties and distribution of the electron avalanche; (b) the effect of the high rate photon flux on GEM foil performance; and (c) the optimal electric field distribution.

Keywords:

Nuclear instruments for hot plasma diagnostics, X-ray detectors, Electron multipliers (gas), Micropattern gaseous detectors (MSGC; GEM; THGEM; RETHGEM; MHSP; MICROPIC; MICROMEGAS; InGrid; etc.)

Affiliations:
Chernyshova M.-Institute of Plasma Physics and Laser Microfusion (PL)
Malinowski K.-Institute of Plasma Physics and Laser Microfusion (PL)
Melikhov Y.-IPPT PAN
Kowalska-Strzęciwilk E.-Institute of Plasma Physics and Laser Microfusion (PL)
Czarski T.-Institute of Plasma Physics and Laser Microfusion (PL)
Wojeński A.-Warsaw University of Technology (PL)
Linczuk P.-Institute of Plasma Physics and Laser Microfusion (PL)
Krawczyk R.D.-Warsaw University of Technology (PL)
7.Chernyshova M., Czarski T., Malinowski K., Melikhov Y., Kasprowicz G., Kowalska-Strzęciwilk E., Linczuk P., Wojeński A., Krawczyk R.D., 2D GEM based imaging detector readout capabilities from perspective of intense soft x-ray plasma radiation, REVIEW OF SCIENTIFIC INSTRUMENTS, ISSN: 0034-6748, DOI: 10.1063/1.5039278, Vol.89, No.10, pp.10G106-1-5, 2018
Abstract:

A detecting system based on the Gas Electron Multiplier (GEM) technology is considered for tokamak plasma radiation monitoring. In order to estimate its capabilities in processing and recording intense photon flux (up to similar to 0.1 MHz/mm(2)), the imaging effectiveness of GEM detectors was tested with different patterned anode planes (i. e., different signal readouts): a simple hexagonal readout structure and three structures with interconnected electrodes (XY square, XY rectangular, and UXV). It was found that under intense photon flux, all the readouts fail to account for a considerable amount of the incoming signals due to mostly photon position determination ambiguity and overlapped signals. Analysis of the signals that can be used to determine photon position and energy unambiguously showed that the UXV readout structure is more effective among the readouts with interconnected electrodes. Along with similar spatial resolution and accuracy, the UXV based layout could be considered as a quite promising base of the interconnected anode electrodes configuration, keeping in mind that the photon rate capability has to be improved for the final application.

Affiliations:
Chernyshova M.-Institute of Plasma Physics and Laser Microfusion (PL)
Czarski T.-Institute of Plasma Physics and Laser Microfusion (PL)
Malinowski K.-Institute of Plasma Physics and Laser Microfusion (PL)
Melikhov Y.-IPPT PAN
Kasprowicz G.-Warsaw University of Technology (PL)
Kowalska-Strzęciwilk E.-Institute of Plasma Physics and Laser Microfusion (PL)
Linczuk P.-Institute of Plasma Physics and Laser Microfusion (PL)
Wojeński A.-Warsaw University of Technology (PL)
Krawczyk R.D.-Warsaw University of Technology (PL)
8.Proniewska K., Pręgowska A., Malinowski K.P., Sleep-related breathing biomarkers as a predictor of vital functions, Bio-Algorithms and Med-Systems, ISSN: 1895-9091, DOI: 10.1515/bams-2017-0003, Vol.13, No.1, pp.43-49, 2017
Abstract:

Because an average human spends one third of his life asleep, it is apparent that the quality of sleep has an important impact on the overall quality of life. To properly understand the influence of sleep, it is important to know how to detect its disorders such as snoring, wheezing, or sleep apnea. The aim of this study is to investigate the predictive capability of a dual-modality analysis scheme for methods of sleep-related breathing disorders (SRBDs) using biosignals captured during sleep. Two logistic regressions constructed using backward stepwise regression to minimize the Akaike information criterion were extensively considered. To evaluate classification correctness, receiver operating characteristic (ROC) curves were used. The proposed classification methodology was validated with constructed Random Forests methodology. Breathing sounds and electrocardiograms of 15 study subjects with different degrees of SRBD were captured and analyzed. Our results show that the proposed classification model based on selected parameters for both logistic regressions determine the different types of acoustic events during sleep. The ROC curve indicates that selected parameters can distinguish normal versus abnormal events during sleep with high sensitivity and specificity. The percentage of prediction for defined SRBDs is very high. The initial assumption was that the quality of result is growing with the number of parameters included in the model. The best recognition reached is more than 89% of good predictions. Thus, sleep monitoring of breath leads to the diagnosis of vital function disorders. The proposed methodology helps find a way of snoring rehabilitation, makes decisions concerning future treatment, and has an influence on the sleep quality.

Keywords:

patient monitoring, sleep-related breathing disorders, vital functions

Affiliations:
Proniewska K.-Jagiellonian University (PL)
Pręgowska A.-IPPT PAN
Malinowski K.P.-Institute of Plasma Physics and Laser Microfusion (PL)