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Zieliński M, Rybak M, Solarczyk-Bombik K, Wilkojc M, Czajkowski W, Kosinski S, Fryzlewicz E, Nabialek T, Pankowski J. Uniportal transcervical video-assisted thoracoscopic surgery (VATS) approach for pulmonary lobectomy combined with transcervical extended mediastinal lymphadenectomy (TEMLA). J Thorac Dis 2017; 9:878-884. [PMID: 28523132 DOI: 10.21037/jtd.2016.12.01] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND To present the technique of uniportal transcervical video-assisted thoracoscopic surgery (VATS) approach for pulmonary lobectomy combined with transcervical extended mediastinal lymphadenectomy (TEMLA). METHODS Transcervical extended approach utilizes a typical a 5-8 centimeters collar incision in the neck. The critical technical point enabling a wide access to the chest is an elevation of the sternal manubrium with a special retractor (modified Rochard frame, Asculap-Chifa Company). A bilateral visualization of the laryngeal recurrent and vagus nerves is usually performed to avoid injury of these structures. The uniportal transcervical VATS lobectomy for NSCLC is preceded by TEMLA to enable optimal intraoperative staging of the mediastinal nodes and perform extensive bilateral lymphadenectomy, which theoretically might affect survival. VATS lobectomy is the next step after obtaining results of intraoperative examination of the nodes. Ventilation of the operated lung is disconnected and the mediastinal pleura is opened. Pleural adhesions are divided. The branches of the pulmonary artery and vein and the lobar bronchus are sequentially dissected and managed with endo staplers. The fissure is divided with endo stapler and the resected lobe is removed in endobag. RESULTS There were 9 patients operated on in the period 1.2.2016-30.7.2016. In one patient with left lower lobe tumor we had to convert to uniportal VATS left lower lobectomy due to extensive adhesions. There was no mortality and complications occurred in 2 patients. The mean operative time was 258.1 min (200-385 min) for the whole TEMLA procedure with imprint cytology and lobectomy and 168.1 min (110-295 min) for a lobectomy solely. CONCLUSIONS A uniportal transcervical video-assisted thoracoscopic surgery (VATS) approach for pulmonary lobectomy combined with TEMLA provides an opportunity for radical pulmonary resection and super radical extensive mediastinal lymphadenectomy.
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Kosiński S, Fryźlewicz E, Wiłkojć M, Ćmiel A, Zieliński M. Comparison of continuous epidural block and continuous paravertebral block in postoperative analgaesia after video-assisted thoracoscopic surgery lobectomy: a randomised, non-inferiority trial. Anaesthesiol Intensive Ther 2017; 48:280-287. [PMID: 28000203 DOI: 10.5603/ait.2016.0059] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Revised: 10/10/2016] [Accepted: 10/19/2016] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Video-assisted (VATS) lung lobectomy can be associated with stronger postoperative pain than is commonly believed. It is generally accepted to introduce multimodal analgaesic strategies based on regional blockade, opioids and non-steroidal anti-inflammatory drugs. However, there is still no consensus regarding the optimal regional technique. The aim of this study was to compare the analgaesic efficacy of continuous thoracic epidural block (TEA) and percutaneous continuous paravertebral block (PVB) in patients undergoing video-assisted lung lobectomy. METHODS Fifty-one patients undergoing VATS lobectomy were enrolled in the present prospective, randomised clinical trial. The same analgaesic regimen in both groups included continuous infusion of 0.25% bupivacaine with epinephrine, intravenous ketoprofen and paracetamol. The doses of local anaesthetics were determined to achieve the spread of at least 4 segments in both groups. Postoperative static and dynamic visual analogue pain scores, as well as patient-controlled morphine usage, were used to compare the efficacy of analgaesia. Side effects and failure rates of both blocks were analysed. RESULTS Static and dynamic pain scores at 24 postoperative hours were significantly lower in the paravertebral group, as were the static pain score at 36 and 48 postoperative hours (P < 0.05). No difference between the treatment groups was identified regarding postoperative morphine usage. The failure rate was higher in the epidural group than in the paravertebral group. No complications were noted in either group, but side effects (urinary retention, hypotension) were more frequent in the epidural group (P < 0.05). CONCLUSIONS Postoperative pain following VATS lung resection procedures is significant and requires the application of complex analgaesic techniques. Percutaneous paravertebral block is equally effective as thoracic epidural block in providing analgaesia in patients undergoing VATS lobectomy. Paravertebral block has a better safety profile than thoracic epidural block.
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Zieliński M, Rybak M, Solarczyk-Bombik K, Wilkojc M, Czajkowski W, Kosinski S, Fryzlewicz E, Nabialek T, Pankowski J. Subxiphoid thymectomy—technical variants. VIDEO-ASSISTED THORACIC SURGERY 2017. [DOI: 10.21037/vats.2017.02.05] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Puślecki M, Ligowski M, Stefaniak S, Zieliński M, Pawlak A, Dąbrowski M, Kłosiewicz T, Sip M, Karczewski M, Małkiewicz T, Gąsiorowski Ł, Telec W, Ładzińska M, Ładziński P, Perek B, Misterski M, Mrówczyński W, Sobczyński P, Panieński P, Łukasik-Głębocka M, Artyńska A, Gezela M, Buczkowski P, Czekajlo M, Jemielity M. Using simulation to create a unique regional ECMO program for the Greater Poland region. Qatar Med J 2017. [PMCID: PMC5474647 DOI: 10.5339/qmj.2017.swacelso.79] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Zieliński M, Dębowski M. The Possibility of Hybrid-Bioreactor Heating by the Microwave Radiation. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2017. [DOI: 10.1515/ijcre-2016-0115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The hybrid bioreactor heated by microwave or conventional by hot water jacket is presented. The reactor consisted of two functional sections. The upper section was constituted by an unsinkable anaerobic biological bed, whereas the bottom section – by suspended anaerobic activated sludge. Both sections were closed in one casing. The study was conducted in mesophilic (35 °C) and thermophilic (55 °C) conditions. Depending on the method of heating, the homogeneity of the temperature field in both functional parts of the reactor was determined. In mesophilic conditions only at measurement points located directly under the wave-guide the temperatures were significantly higher than in the other zones inside the reactor. This implies that it is possible to homogenous heat of the bioreactor in semi-technical scale by microwave irradiation. Under thermophilic conditions a homogenous field of temperature was obtained in the upper and in the bottom section of the bioreactor, however, significant differences were found in values of the temperature between the particular sections of the bioreactor.
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Zieliński M, Rybak M, Solarczyk-Bombik K, Wilkojc M, Czajkowski W, Kosinski S, Fryzlewicz E, Nabialek T, Pankowski J. Subxiphoid VATS approach for the mediastinum. VIDEO-ASSISTED THORACIC SURGERY 2017. [DOI: 10.21037/vats.2016.12.02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Gwóźdź P, Pasieka-Lis M, Kołodziej K, Pankowski J, Zieliński M. OA07.03 Prognostic Significance of Micrometastases in Mediastinal Lymph Nodes of Patients With Radically Resected Non-Small Cell Lung Cancer. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2016.11.264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Zieliński M, Cydzik-Kwiatkowska A, Zielińska M, Dębowski M, Rusanowska P, Kopańska J. Nitrification in Activated Sludge Exposed to Static Magnetic Field. WATER, AIR, AND SOIL POLLUTION 2017; 228:126. [PMID: 28316352 PMCID: PMC5339327 DOI: 10.1007/s11270-017-3316-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 02/24/2017] [Indexed: 05/13/2023]
Abstract
The study investigated wastewater treatment in an aerobic reactor with activated sludge exposed to static magnetic field (SMF) with mean induction of 8.1 mT. The efficiency of chemical oxygen demand removal was about 90% in a control reactor and an SMF-exposed reactor. Although the nitrification efficiency was higher than 95% in both reactors, the activity of ammonia-oxidizing bacteria was higher in the SMF-exposed reactor. This resulted in shortening of nitrification time to 4 h compared to 8 h in the control reactor. Higher number of ammonia-oxidizing bacteria in the SMF-exposed reactor might result from increased oxygen penetration into the liquid exposed to SMF, which favored growth of these bacteria. The results indicate that SMF enhanced nitrification, the most sensitive process from the biological nitrogen transformations. SMF influenced the overall biomass content that was 14% higher in the SMF-exposed reactor than in the control reactor.
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Kłosiewicz T, Skitek-Adamczak I, Zieliński M. Emergency medical system response time does not affect incidence of return of spontaneous circulation after prehospital resuscitation in one million central European agglomeration residents. Kardiol Pol 2016; 75:240-246. [PMID: 27995600 DOI: 10.5603/kp.a2016.0181] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 09/07/2016] [Accepted: 11/08/2016] [Indexed: 11/25/2022]
Abstract
BACKGROUND The survival of out-of-hospital sudden cardiac arrest (OHSCA) in Europe still remains low. The State Medical Rescue System is composed of several elements. The efficacy of each of these elements may have an influence on the victim's survival. Until now, the incidence of return of spontaneous circulation (ROSC) and its correlation with rescue services time in the city of Poznan has not been determined. AIM The main purpose of this study was to assess incidents of OHSCA and prehospital frequency of ROSC after OHSCA in Poznan city and district. We also wanted to analyse whether ROSC depends on Emergency Medical System (EMS) reaction time. METHODS Retrospective analysis based on medical documentation conducted in 2015 in Poznan EMS. RESULTS Return of spontaneous circulation was achieved in 68.88% of cases. It was most frequent when OHSCA occurred in public places (p = 0.000, contingency factor = 0.233) and victims were younger (p = 0.042, contingency factor = 0.129). 63.17% of patients were male, but sex did not affect the incidence of ROSC. The median time of system response was 8.53 min, while time from ambulance departure to arrival was 5.42 min. We did not find any statistically significant difference between the number of deaths and those parameters (p = 0.723, p = 0.891). However, longer team response time correlated with the highest mortality (p = 0.042, contingency factor = 0.126). In the group where ROSC was achieved the median time of EMS response was 8.18 min, while among the group of deceased the median was 8.63 min. CONCLUSIONS The incidence of OHSCA in our region is similar to other Polish and European cities. EMS response time does not affect the frequency of ROSC. ROSC was achieved more often if OHSCA occurred in public and the victim was younger.
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Schätti-Ozerianska I, Moskal P, Zieliński M. Determination of the analysing power for the $\bar{p}p$ → ppηreaction using the WASA-at-COSY detector system. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201613003010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Głowacz B, Alfs D, Bednarski T, Białas P, Czerwiński E, Gajos A, Gorgol M, Jasińska B, Kamińska D, Korcyl G, Kowalski P, Kozik T, Krzemień W, Kubicz E, Mohammed M, Pawlik-Niedźwiecka M, Niedźwiecki S, Pałka M, Raczyński L, Rudy Z, Rundel O, Sharma N, Silarski M, Strzelecki A, Wieczorek A, Wiślicki W, Zieliński M, Zgardzińska B, Moskal P. Hybrid TOF-PET/MRI local transceiver coil. Phys Med 2016. [DOI: 10.1016/j.ejmp.2016.07.479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Kubicz E, Alfs D, Bednarski T, Białas P, Czerwiński E, Gajos A, Głowacz B, Gorgol M, Jasińska B, Kamińska D, Korcyl G, Kowalski P, Kozik T, Krzemień W, Mohammed M, Pawlik-Niedźwiecka M, Niedźwiecki S, Pałka M, Raczyński L, Rudy Z, Rundel O, Sharma N, Silarski M, Strzelecki A, Wieczorek A, Wiślicki W, Zieliński M, Zgardzińska B, Moskal P. Novel J-PET scanner combined with positron annihilation lifetime spectroscopy technique as a tool for morphometric imaging. Phys Med 2016. [DOI: 10.1016/j.ejmp.2016.07.478] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Zielinski M, Alfs D, Bednarski T, Białas P, Czerwiński E, Gajos A, Głowacz B, Gorgol M, Jasińska B, Kamińska D, Korcyl G, Kowalski P, Kozik T, Krzemień W, Kubicz E, Mohammed M, Pawlik-Niedźwiecka M, Niedźwiecki S, Pałka M, Raczyński L, Rudy Z, Rundel O, Sharma N, Silarski M, Strzelecki A, Wieczorek A, Wiślicki W, Zieliński M, Zgardzińska B, Moskal P. Mobile PET insert for simultaneous PET/MRI imaging. Phys Med 2016. [DOI: 10.1016/j.ejmp.2016.07.477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Wieczorek A, Alfs D, Bednarski T, Białas P, Czerwiński E, Gajos A, Głowacz B, Gorgol M, Jasińska B, Kamińska D, Korcyl G, Kowalski P, Kozik T, Krzemień W, Kubicz E, Mohammed M, Pawlik-Niedźwiecka M, Niedźwiecki S, Pałka M, Raczyński L, Rudy Z, Rundel O, Sharma N, Silarski M, Strzelecki A, Wiślicki W, Zieliński M, Zgardzińska B, Moskal P. Novel plastic scinitllators for the fully digital and MRI compatible J-PET scanner. Phys Med 2016. [DOI: 10.1016/j.ejmp.2016.07.480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Zielińska M, Zieliński M, Dębowski M. Abundance of methanogenic Archaea during fermentation of Virginia mallow (Sida hermaphrodita) ensilage. N Biotechnol 2016. [DOI: 10.1016/j.nbt.2016.06.1053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kozłowski W, Piwoński I, Szmaja W, Zieliński M. Quantitative study of the effect of current density on the morphological and magnetic domain structures of electrodeposited nanocrystalline cobalt films. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.03.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Moskal P, Rundel O, Alfs D, Bednarski T, Białas P, Czerwiński E, Gajos A, Giergiel K, Gorgol M, Jasińska B, Kamińska D, Kapłon Ł, Korcyl G, Kowalski P, Kozik T, Krzemień W, Kubicz E, Niedźwiecki S, Pałka M, Raczyński L, Rudy Z, Sharma NG, Słomski A, Silarski M, Strzelecki A, Wieczorek A, Wiślicki W, Witkowski P, Zieliński M, Zoń N. Time resolution of the plastic scintillator strips with matrix photomultiplier readout for J-PET tomograph. Phys Med Biol 2016; 61:2025-47. [PMID: 26895187 DOI: 10.1088/0031-9155/61/5/2025] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Recent tests of a single module of the Jagiellonian Positron Emission Tomography system (J-PET) consisting of 30 cm long plastic scintillator strips have proven its applicability for the detection of annihilation quanta (0.511 MeV) with a coincidence resolving time (CRT) of 0.266 ns. The achieved resolution is almost by a factor of two better with respect to the current TOF-PET detectors and it can still be improved since, as it is shown in this article, the intrinsic limit of time resolution for the determination of time of the interaction of 0.511 MeV gamma quanta in plastic scintillators is much lower. As the major point of the article, a method allowing to record timestamps of several photons, at two ends of the scintillator strip, by means of matrix of silicon photomultipliers (SiPM) is introduced. As a result of simulations, conducted with the number of SiPM varying from 4 to 42, it is shown that the improvement of timing resolution saturates with the growing number of photomultipliers, and that the [Formula: see text] configuration at two ends allowing to read twenty timestamps, constitutes an optimal solution. The conducted simulations accounted for the emission time distribution, photon transport and absorption inside the scintillator, as well as quantum efficiency and transit time spread of photosensors, and were checked based on the experimental results. Application of the [Formula: see text] matrix of SiPM allows for achieving the coincidence resolving time in positron emission tomography of [Formula: see text]0.170 ns for 15 cm axial field-of-view (AFOV) and [Formula: see text]0.365 ns for 100 cm AFOV. The results open perspectives for construction of a cost-effective TOF-PET scanner with significantly better TOF resolution and larger AFOV with respect to the current TOF-PET modalities.
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Głowacz B, Zieliński M, Alfs D, Bednarski T, Białas P, Czerwiński E, Gajos A, Gorgol M, Jasińska B, Kamińska D, Kapłon Ł, Korcyl G, Kowalski P, Kozik T, Krzemień W, Kubicz E, Mohammed M, Pawlik-Niedźwiecka M, Niedźwiecki S, Pałka M, Raczyński L, Rudy Z, Rundel O, Sharma N, Silarski M, Słomski A, Strzelecki A, Wieczorek A, Wiślicki W, Zgardzińska B, Moskal P. Hybrid TOF-PET/MRI local transceiver coil. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)30097-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Zieliński M, Głowacz B, Alfs D, Bednarski T, Białas P, Czerwiński E, Gajos A, Gorgol M, Jasińska B, Kamińska D, Kapłon Ł, Korcyl G, Kowalski P, Kozik T, Krzemień W, Kubicz E, Mohammed M, Pawlik-Niedźwiecka M, Niedźwiecki S, Pałka M, Raczyński L, Rudy Z, Rundel O, Sharma N, Silarski M, Słomski A, Strzelecki A, Wieczorek A, Wiślicki W, Zgardzińska B, Moskal P. The mobile PET insert for simultaneous PET/MRI imaging. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)30242-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Krzemień W, Alfs D, Bednarski T, Białas P, Czerwiński E, Gajos A, Głowacz B, Gorgol M, Jasińska B, Kamińska D, Kapłon Ł, Korcyl G, Kowalski P, Kozik T, Kubicz E, Mohammed M, Niedźwiecki S, Pałka M, Raczyński L, Rudy Z, Rundel O, Sharma N, Silarski M, Słomski A, Strzelecki A, Wieczorek A, Wiślicki W, Zgardzińska B, Zieliński M, Moskal P. Front-end electronics and hit position reconstruction methods for the J-PET scanner. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)30129-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Dębowski M, Zieliński M, Kisielewska M, Hajduk A. Effect of constant magnetic field on anaerobic digestion of algal biomass. ENVIRONMENTAL TECHNOLOGY 2016; 37:1656-1663. [PMID: 26672642 DOI: 10.1080/09593330.2015.1126362] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 11/24/2015] [Indexed: 06/05/2023]
Abstract
The aim of the study was to determine the impact of the constant magnetic field (CMF) application on the effectiveness of anaerobic digestion of algal biomass. The highest yield of biogas in the range of 448.9 L/kg volatile solids (VS) to 456.6 L/kg VS was observed in the variants, in which the retention time in the CMF-exposed area ranged from 144 to 216 min/d. Under these conditions, the concentration of methane in the biogas was nearly 65.0%. The increase in the contact time of the fermentation medium with the CMF-exposed area had a significant impact of reducing the effectiveness of anaerobic digestion. The lowest biodegradation was observed when the retention time was 432 min/d. Under such condition, 281.1 L of biogas/kg VS with methane content of 41.8% was obtained. A correlation between the time of exposure to CMF and the values of parameters characterizing the methane production was found.
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Alfs D, Asaturyan A, Carmignotto M, Diermaier M, Eyrich W, Głowacz B, Grzonka D, Hauenstein F, Horn T, Kilian K, Malbrunot-Ettenauer S, Mkrtchyan A, Mkrtchyan H, Moskal P, Nadel-Turonski P, Oelert W, Ritman J, Sefzick T, Tadevosyan V, Widmann E, Wolke M, Zhamkochyan S, Zieliński M, Zink A, Zmeskal J. Status of the analysis for the search of polarization in the antiproton production process. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201613007002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Moskal P, Alfs D, Bednarski T, Białas P, Curceanu C, Czerwiński E, Dulski K, Gajos A, Głowacz B, Gupta-Sharma N, Gorgol M, Hiesmayr BC, Jasińska B, Kamińska D, Khreptak O, Korcyl G, Kowalski P, Krzemień W, Krawczyk N, Kubicz E, Mohammed M, Niedźwiecki S, Pawlik-Niedńwiecka M, Raczyński L, Rudy Z, Silarski M, Smyrski J, Wieczorek A, Wiślicki W, Zgardzińska B, Zieliński M. Studies of discrete symmetries in a purely leptonic system using the Jagiellonian Positron Emission Tomograph. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201613007015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Pawlik-Niedźwiecka M, Khreptak O, Gajos A, Wieczorek A, Alfs D, Bednarski T, Białas P, Curceanu C, Czerwiński E, Dulski K, Głowacz B, Gupta-Sharma N, Gorgol M, Hiesmayr BC, Jasińska B, Kamińska D, Korcyl G, Kowalski P, Krzmień W, Krawczyk N, Kubicz E, Mohammed M, Niedźwiecki S, Raczyński L, Rudy Z, Silarski M, Wiślicki W, Zgardzińska B, Zieliński M, Moskal P. J-PET detector system for studies of the electron-positron annihilations. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201613007020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kamińska D, Gajos A, Czerwiński E, Alfs D, Bednarski T, Białas P, Curceanu C, Dulski K, Głowacz B, Gupta-Sharma N, Gorgol M, Hiesmayr BC, Jasińska B, Korcyl G, Kowalski P, Krzemień W, Krawczyk N, Kubicz E, Mohammed M, Niedźwiecki S, Pawlik-Niedźwiecka M, Raczyński L, Rudy Z, Silarski M, Wieczorek A, Wiślicki W, Zgardzińska B, Zieliński M, Moskal P. A feasibility study of ortho-positronium decays measurement with the J-PET scanner based on plastic scintillators. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS 2016; 76:445. [PMID: 27547122 PMCID: PMC4978780 DOI: 10.1140/epjc/s10052-016-4294-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Accepted: 08/01/2016] [Indexed: 05/13/2023]
Abstract
We present a study of the application of the Jagiellonian positron emission tomograph (J-PET) for the registration of gamma quanta from decays of ortho-positronium (o-Ps). The J-PET is the first positron emission tomography scanner based on organic scintillators in contrast to all current PET scanners based on inorganic crystals. Monte Carlo simulations show that the J-PET as an axially symmetric and high acceptance scanner can be used as a multi-purpose detector well suited to pursue research including e.g. tests of discrete symmetries in decays of ortho-positronium in addition to the medical imaging. The gamma quanta originating from o-Ps decay interact in the plastic scintillators predominantly via the Compton effect, making the direct measurement of their energy impossible. Nevertheless, it is shown in this paper that the J-PET scanner will enable studies of the [Formula: see text] decays with angular and energy resolution equal to [Formula: see text] and [Formula: see text], respectively. An order of magnitude shorter decay time of signals from plastic scintillators with respect to the inorganic crystals results not only in better timing properties crucial for the reduction of physical and instrumental background, but also suppresses significantly the pile-ups, thus enabling compensation of the lower efficiency of the plastic scintillators by performing measurements with higher positron source activities.
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