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Tytuł:
PET and SPECT imaging as a solid guide to detect and discriminate atypical phenotypes of neurodegenerative disorders
Autorzy:
Ruffini, Livia
Zilioli, Alessandro
Cervati, Veronica
Lauretani, Fulvio
Misirocchi, Francesco
Maggio, Marcello
Migliari, Silvia
Graziani, Tiziano
Cidda, Carla
Baldari, Giorgio
Spallazzi, Marco
Scarlattei, Maura
Powiązania:
https://bibliotekanauki.pl/articles/40521373.pdf
Data publikacji:
2024-03-30
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
atypical phenotypes
neurodegenerative diseases
positron emission tomography
single photon emission computed tomography
Opis:
Introduction and aim. Atypical or mixed presentations of neurodegenerative disorders may postpone or confound the final diagnosis. Molecular imaging with positron emission tomography (PET) and single photon emission computed tomography (SPECT) radioligands provide target-specific information and may anticipate the diagnosis by “in vivo” detection of the neuropathological substrate, as Aβ deposition, nigrostriatal dopaminergic depletion or tau inclusions. This concise review will discuss the potential of PET and SPECT imaging as a solid guide to better characterize atypical phenotypes of neurodegeneration in the clinical routine, with the potential to drive personalized interventions, improve cohort uniformity for clinical trials, and serve as biomarkers for targeted molecular therapies. Material and methods. Literature search was performed focusing on the role of PET and SPECT imaging in assessing atypical phenotypes of neurodegeneration, using the electronic source of database PubMed/MEDLINE and the web-based search engines Google, Google Scholar. Analysis of the literature. New disease-modifying drugs may increase their effect with early initiation, which is especially important in working persons and younger subjects presenting atypical symptoms. In older individuals, the coexistence of neurodegeneration, age-related changes, cerebrovascular lesions, or depression makes challenging a definitive diagnosis. Quantitative tools able to measure tracer distribution increase the accuracy of molecular neuroimaging creating topographic maps that compare subject’s data with healthy controls databases. Conclusion. Atypical phenotypes may be associated with quantitative key-pattern allowing a more precise and early diagnosis of the neurodegenerative disorder. Finally, quantitative assessment of the pathological substrates allows us to track the disease process and measure treatment response.
Źródło:
European Journal of Clinical and Experimental Medicine; 2024, 22, 1; 201-221
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Common path optical coherence tomography with electronic feedback for improved sensitivity
Autorzy:
Alsnaie, Khalid
Powiązania:
https://bibliotekanauki.pl/articles/27310102.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
optical coherence tomography
frequency domain
OCT
medical imaging
partially coherent interferometers
B-scan
Opis:
Optical coherence tomography (OCT) imaging has become a useful tool in medical diagnosis over the past 25 years, because of its ability to visualize intracellular structures at high resolution. The main objective of this work is to add electronic feedback to the optical coherence tomography setup to increase its sensitivity. Noise added to the measured interferogram obscures some details of examined tissue layered structure. Adjusting signal power level in such a way to improve signal-to-noise ratio can help to enhance image quality. Electronic feedback is added to enhance system sensitivity. A logarithmic amplifier is included in the OCT setup to automatically adapt signal level. Moreover, the resolution of the optical spectrum analyzer is controlled according to the farthest layer detected in the A-scan. These techniques are tested showing an improvement in obtained image of a human nail.
Źródło:
Optica Applicata; 2023, 53, 3; 495--504
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Current techniques of 3D reconstruction in computed tomography and magnetic resonance in diagnostic imaging of the spine
Aktualne techniki rekonstrukcji 3D w tomografii komputerowej i rezonansie magnetycznym w diagnostyce obrazowej kręgosłupa
Autorzy:
Nowak, Piotr
Dąbrowski, Mikołaj
Kubaszewski, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/12667285.pdf
Data publikacji:
2023-09-20
Wydawca:
Wydawnictwo Exemplum
Tematy:
3D reconstruction
computed tomography
magnetic resonance imaging
fusion imaging of MRI/CT
rekonstrukcja 3D
tomografia komputerowa
rezonans magnetyczny
obrazy fuzyjne MRI/CT
Opis:
This review article presents an analysis of 36 scientific papers focusing on modern three-dimensional (3D) reconstruction techniques in computed tomography (CT) and magnetic resonance imaging (MRI) for their applications in medical diagnostics. The objective of this review is to present the current state of knowledge regarding the development and utilization of 3D reconstruction techniques, as well as to identify key trends and challenges in this field. The first part of the study focuses on the advancements in MRI and CT. The analysis reveals the major trends in the evolution of these diagnostic methods, such as increased accessibility of CT and MRI examinations for patients, reduced scan duration, greater utilization of artificial intelligence, and expanded applications in interventional radiology. The second part of the article highlights the potential and effectiveness of 3D modelling in diagnostic imaging. Creating 3D models of anatomical structures is a complex and multi-step process. Through the review, it was determined that 3D models derived from MRI can be equally accurate and diagnostically valuable compared to the more commonly used CT-based reconstructions. In the future, fusion imaging of MRI/CT is expected to play an increasingly significant role in orthopaedic imaging. The review demonstrates the significant potential of 3D modelling in diagnostic imaging. However, further research is still required to better understand the capabilities of 3D modelling in diagnosing complex anatomical structures. The integration of information technology in medicine will be crucial in advancing this field.
Przedstawiono analizę 36 artykułów naukowych dotyczących nowoczesnych technik rekonstrukcji trójwymiarowych (3D) w tomografii komputerowej (CT) oraz rezonansie magnetycznym (MRI) w kontekście zastosowania tych technik w diagnostyce medycznej. Celem przeglądu jest zaprezentowanie aktualnego stanu wiedzy na temat rozwoju i zastosowania rekonstrukcji 3D oraz identyfikacja najważniejszych trendów i wyzwań w tej dziedzinie. W pierwszej części pracy skoncentrowano się na kierunkach rozwoju MRI i CT. Analiza wskazała główne trendy w ewolucji obu tych metod diagnostycznych, takie jak zwiększenie dostępności badań CT i MRI dla pacjentów, skrócenie czasu trwania badania, zwiększenie roli sztucznej inteligencji oraz szersze wykorzystanie tych modalności w radiologii interwencyjnej. Druga część pracy skupia się na możliwościach użycia modelowania 3D w diagnostyce obrazowej i jego skuteczności. Tworzenie trójwymiarowych modeli struktur anatomicznych to złożony i wieloetapowy proces. W toku przeglądu ustaliliśmy, że modele 3D uzyskane na podstawie MRI mogą być równie dokładne i posiadać podobną wartość diagnostyczną co wykorzystywane do tej pory rekonstrukcje oparte o obrazy CT. W przyszłości coraz większą rolę w diagnostyce obrazowej w ortopedii będą odgrywać obrazy fuzyjne MRI/CT. Przegląd pokazuje, że modelowanie 3D ma duży potencjał w diagnostyce obrazowej. Wciąż są jednak potrzebne dalsze badania, aby lepiej zrozumieć możliwości modelowania 3D w diagnostyce złożonych struktur anatomicznych. Wykorzystanie technologii informatycznych w medycynie będzie miało kluczowe znaczenie w tym procesie.
Źródło:
Chirurgia Narządów Ruchu i Ortopedia Polska; 2023, 88, 3; 103-108
0009-479X
2956-4719
Pojawia się w:
Chirurgia Narządów Ruchu i Ortopedia Polska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of age by mental foramen using CBCT in central India
Autorzy:
Bose, Sourav
Sur, Jaideep
Khan, Fatima
Dewangan, Deeplaxmi
Paul, Sushmita
Sawriya, Ekta
Roul, Ayesha
Powiązania:
https://bibliotekanauki.pl/articles/27317669.pdf
Data publikacji:
2023-09-30
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
cone-beam computed tomography
forensic science
mental foramina
Opis:
Introduction and aim. This study aims to estimate the age of a population in Central India by analyzing the mental foramen using cone beam computed tomography (CBCT). The objectives of the study are to determine the parameters for age determination and study bilateral variations in mental foramen dimensions using CBCT. Material and methods. One hundred and twenty CBCT scans, HD LED monitor, GALAXIS GALLIEOS viewer. Results. Results from the study show significant values for various parameters such as the upper and lower borders of the mandible and mental foramen. Bilateral variations were also observed. The age regression model indicates a significant correlation between estimated and original ages for individuals aged between 31 to 50 years. While the study only analyzed five parameters of the mental foramen, it suggests that a more comprehensive assessment of mental foramen parameters with a larger sample size can yield more definitive results for age determination. Conclusion. As only five parameters of mental foramen had been assessed in this retrospective study, so a comprehensive assessment of various other parameters of mental foramen with an increased sample size may be done for more definitive results for gender and age determination.
Źródło:
European Journal of Clinical and Experimental Medicine; 2023, 3; 500-505
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methodological add-ons to a non-destructive, micro-CT-based taxonomic/morphometric analysis of characean remains
Autorzy:
Benyó-Korcsmáros, Réka
Gulyás, Sándor
Sebők, Dániel
Benyó, Dániel
Cseh, Péter
Sümegi, Pál
Powiązania:
https://bibliotekanauki.pl/articles/24201075.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
characeae
computer tomography
gyrogonite
tomografia komputerowa
gyrogonit
Opis:
Ever since its introduction, computed tomography has come a long way. No longer is it merely a method that is used in clinical diagnostics, but it is becoming more and more popular among palaeontologists because it can be used to analyse both external and internal structures of fossil remains, such as small insects, snail shells and plant remains. The present study describes non-destructive analyses of Late Cretaceous and early Holocene charophyte gyrogonites by using the micro-CT technique, from sample preparation (embedding, fixing) to visualisation and assessment of images obtained. In addition to this non-destructive examination, we wished to test whether or not computed tomography could be used to examine the gyrogonites. Our preliminary results have made it clear that the micro-CT technique is worth employing for further research. It has proved possible to visualise the samples in 3D, rotate them, and observe them from different directions. By using the appropriate parameters, we have also been able to observe density differences between parts of characean remains and to study several important defining features of these.
Źródło:
Geologos; 2023, 29, 2; 69--75
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multimodalność wtórna i widzialność tomograficzna na przykładzie Nakarmić kamień Bronki Nowickiej
Secondary Multimodality and Tomographic Visibility – The Example of Bronka Nowicka’s Nakarmić Kamień (To Feed a Stone)
Autorzy:
Mazur, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/32062483.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
multimodality
Bronka Nowicka
word and image
tomography art
ekphrasis
multimodalność
słowo i obraz
sztuka tomograficzna
ekfraza
Opis:
The research paper presents the concept of secondarily multimodal work, which problematizes the status of e.g.: visual elements added to further editions of an initially monomodal text in the context of its interpretation. This issue is discussed using the example of Bronka Nowicka’s volume To Feed a Stone (2015; 2017), which was expanded in the second edition with photographs and tomographs of the objects described. The analysis shows that some added graphic elements break up the coherence of the narrative and both reinforce and undermine the mimesis in the work. They function based on the principle of a Derridean supplement: they complement and condition the content of the verbal passages. The article concludes with a study of art volumes that are part of Nowicka’s intermedia project focusing on exploring the relationship between image and memory.
Źródło:
Przestrzenie Teorii; 2023, 39; 77-99
2450-5765
Pojawia się w:
Przestrzenie Teorii
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Novel hybrid algorithm using convolutional autoencoder with SVM for electrical impedance tomography and ultrasound computed tomography
Nowy algorytm hybrydowy wykorzystujący autoenkoder konwolucyjny z SVM dla elektrycznej tomografii impedancyjnej i tomografii ultradźwiękowej
Autorzy:
Maciura, Łukasz
Wójcik, Dariusz
Rymarczyk, Tomasz
Król, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/27315418.pdf
Data publikacji:
2023
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
convolutional autoencoder
SVM
electrical impedance tomography
ultrasound transmission tomography
autoencoder konwolucyjny
elektryczna tomografia impedancyjna
ultradźwiękowa tomografia transmisyjna
Opis:
This paper presents a new hybrid algorithm using multiple support vector machines models with a convolutional autoencoder forelectrical impedance tomography, and ultrasound computed tomography image reconstruction. The ultimate hybrid solution uses multiple SVM models to convert input measurements to individual autoencoder codes representing a given scene then the decoder part of the autoencoder can reconstruct the scene.
Artykuł przedstawia nowy hybrydowy algorytm który używa modeli maszyn wektorów nośnych wraz z autoenkoderem konwolucyjnym do rekonstrukcji obrazu z elektrycznej tomografii impedancyjnej oraz ultrasonograficznej tomografii transmisyjnej. Ostateczne rozwiązanie hybrydowe używa wielu modeli SVM do konwersji pomiarów wejściowych do pojedynczych kodów autoenkodera reprezentujących daną scenę a wtedy dekoder wyciętyz autoenkodera może zrekonstruować daną scenę.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2023, 13, 2; 4--9
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical Simulation of Breast Cancer in the Early Diagnosis with Actual Dimension and Characteristics Using Photoacoustic Tomography
Autorzy:
Ahangar Darband, Maryam
Najafi Aghdam, Esmaeil
Gharibi, Arash
Powiązania:
https://bibliotekanauki.pl/articles/31339923.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
photoacoustic
PA
photoacoustic imaging
PAI
photoacoustic tomography
breast cancer
early diagnosis
Opis:
A numerical study and simulation of breast imaging in the early detection of tumors using the photoacoustic (PA) phenomenon are presented. There have been various reports on the simulation of the PA phenomenon in the breast, which are not in the real dimensions of the tissue. Furthermore, the different layers of the breast have not been considered. Therefore, it has not been possible to rely on the values and characteristics of the resulting data and to compare it with the actual state. Here, the real dimensions of the breast at three-dimensional and different constituent layers have been considered. After reviewing simulation methods and software for different stages of the PA phenomenon, a single suitable platform, which is commercially available finite element software (COMSOL), has been selected for simulating. The optical, thermal, elastic, and acoustic characteristics of different layers of breast and tumor at radiated laser wavelength (800 nm) were accurately calculated or obtained from a reliable source. Finally, by defining an array of 32 ultrasonic sensors on the breast cup at the defined arcs of the 2D slices, the PA waves can be collected and transmitted to MATLAB software to reconstruct the images. We can study the resulting PA wave and its changes in more detail using our scenarios.
Źródło:
Archives of Acoustics; 2023, 48, 1; 25-38
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recognition of the flysch substrate using the electrical resistivity tomography (ERT) method to assess the effectiveness of the injection process
Autorzy:
Ćwiklik, Michał
Pasierb, Bernadetta
Porzucek, Slawomir
Powiązania:
https://bibliotekanauki.pl/articles/27310120.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
electrical resistivity tomography ERT
monitoring
Carpathian flysch
injection
Opis:
During the construction of a section of the S-7 Lubień – Rabka-Zdrój dual expressway, located in the area of the Carpathian flysch (Carpathian Flysch Belt, South Poland), damage to the embankment was observed, as well as cracks and depressions in the new pavement. An analysis of the geological and engineering conditions in the area of the road section under construction showed the existence of a complex tectonic structure of the flysch formations, a shallow groundwater table, and numerous landslides. In order to stabilize the road substrate, it was decided to carry out injections, and the locations of these injections were initially geotechnically tested. However, due to the high variability of the geological structure, the target method employed was electrical resistivity tomography (ERT), which performed the survey in two stages. In Stage I, the geoelectrical/geochemical structure of the near-surface zone was identified, and the probable causes of road damage were indicated. This stage was completed by performing the stabilization and sealing process of the ground with an injection mixture. In Stage II, studies were carried out to evaluate the effectiveness of the injection process. The ERT method effectively identified the shallow geological structure and, in particular, delineated the zone of strong fractures in the flysch and areas associated with faults. Using the electrical resistivity tomography method, it was also possible to determine the injection mixture’s approximate penetration depth and the loosening zone’s degree of filling.
Źródło:
Geology, Geophysics and Environment; 2023, 49, 2; 197--202
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Roadmap for daily practice of CBCT in cleft lip palate paediatric patients: a pictorial review.
Autorzy:
Olszewski, Raphael
De Muylder, Antoine
Siciliano, Sergio
Powiązania:
https://bibliotekanauki.pl/articles/48519884.pdf
Data publikacji:
2023
Wydawca:
Presses Universitaires de Louvain
Tematy:
cone beam computed tomography
CBCT
cleft lip palate
paediatric
reporting
Opis:
Objective: to present and to illustrate a new methodology for daily practice in cone beam computed tomography (CBCT) interpretation and reporting in cleft lip palate (CLP) non syndromic paediatric patients. The proposed protocol is based on clinical experience and on systematic search of the literature. Material and methods: We performed two types of systematic search of articles: 1) articles related to the use of CBCT in CLP patients, and 2) articles related to the reporting and interpretation of the CBCT images by radiologists. We used two databases PubMed and Google scholar. Results: For indications of CBCT in CLP patients we found in PubMed 378 articles and 48 articles were selected for the review; in Google scholar we found 463 articles, and 9 articles were selected for the review. 2) For reporting in CBCT we found 956 articles in PubMed, and 9 articles were selected for the review. Conclusions: We presented the 6-steps system for interpretation and reporting information from CBCT of CLP paediatric patients: 1) Step 1 (axial view): presence or absence of bone bridge remnants of alveolar bone graft; Step 2 (3D dental tissue reconstruction): description of dental arch tooth by tooth, search for agenesis and supernumerary teeth, description of variation in the position of the tooth explaining the type of existing translation and rotation; Step 3 (coronal view): cleft palate pathway and its extension; anomaly in maxillary, ethmoid and sphenoid sinuses if existing; Step 4 (sagittal and coronal view): checking of the opening (calcification sites) of the sphenooccipital synchondrosis, and checking of anomalies of the occipital bone; Step 5 (3D bone tissue reconstruction): C1-C2 vertebra anomalies; Step 6 (3D soft tissue reconstruction): external ear anomalies. We illustrated our methodology with 46 figures from 5 CBCT of CLP patients.
Źródło:
Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery; 2023, 30, 1; 1-50
2593-3604
Pojawia się w:
Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensor platform of industrial tomography for diagnosticsand control of technological processes
Platforma sensorowa tomografii przemysłowej do diagnostyki i sterowania procesami technologicznymi
Autorzy:
Król, Krzysztof
Rymarczyk, Tomasz
Niderla, Konrad
Kozłowski, Edward
Powiązania:
https://bibliotekanauki.pl/articles/27315361.pdf
Data publikacji:
2023
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
electrical capacitance tomography
cyber-physical systems
sensors
electrical impedance tomography
tomografia pojemnościowa
systemy cyber-fizyczne
sensory
tomografia impedancyjna
Opis:
This article presents an industrial tomography platform for diagnosing and controlling technological processes. The system has been prepared in such a way that it is possible to add individual sensors that cooperate with the system of an intelligent cyber-physical platform with an open architecture. In addition, it is possible to configure and cooperate with external systems freely. As part of the experimental work, a platform has been developed that allows individual subsystems and external customer systems to work together. The cyber-physical system, a new generation of digital systems, focuses mainly on the complex interaction and integration between cyberspace and the physical world. A cyber-physical system consists of highly integrated computing, communication, control and physical elements. It focuses mainly on the complex interaction and integration between cyberspace and the physical world.
W artykule przedstawiono przemysłową platformę tomograficzną wykorzystywaną do diagnostyki i sterowania procesami technologicznymi. Aplikacja pozwala na dodawanie poszczególnych czujników współpracujących z systemem inteligentnej platformy cyber-fizycznej o otwartej architekturze, a dodatkowo możliwa była dowolna konfiguracja i współpraca z systemami zewnętrznymi. W ramach prac eksperymentalnych opracowano platformę, która umożliwia współpracę poszczególnych podsystemów i zewnętrznych systemów klienta. System cyberfizyczny, koncentruje się głównie na złożonej interakcji i integracji między cyberprzestrzenią a światem fizycznym. System cyberfizyczny składa się z wysoce zintegrowanych elementów obliczeniowych, komunikacyjnych, kontrolnych i fizycznych. Rozwiązanie koncentruje się głównie na złożonej interakcji i integracji między cyberprzestrzenią a światem fizycznym.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2023, 13, 1; 33--37
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Taurodontic teeth in cone beam computed tomography: pictorial review
Autorzy:
Fourneau, Eléonore
Olszewski, Raphael
Powiązania:
https://bibliotekanauki.pl/articles/48518226.pdf
Data publikacji:
2023
Wydawca:
Presses Universitaires de Louvain
Tematy:
taurodontism
CBCT
cone beam computed tomography
taurodontic teeth
Opis:
Objective: Taurodontism is a developmental disorder with enlargement of the body of the tooth and lack of cervical constriction, which results in a large pulp chamber and small roots with the apical displacement of furcation. Taurodontism exists in deciduous, and definitive unilateral, and bilateral teeth. We found that taurodontism was also described in 67 syndromes. We proposed a review of the open access literature on taurodontism, a new clinical classification of taurodontic teeth with illustrations from free open access literature, and from our case serie of 15 patients. Material and methods: We performed a systematic search for articles with free full text about taurodontism. The search was performed by one observer in PubMed database. We found 168 articles, and after application of inclusion/exclusion criteria we finally selected 136 articles for the review. Results: we provided 34 figures of taurodontic teeth related to: 1) Unilateral mandibular first premolar, 2) Unilateral mandibular second premolar, 3) Bilateral mandibular first and second premolar, 4) Bilateral upper maxillary first premolars, 5) Bilateral mandibular second molars, 6) Bilateral upper maxillary second premolar and left first molar, 7) Bilateral upper maxillary third molars, 8) Bilateral upper maxillary first and second molars, 9) Bilateral upper maxillary first, second, and third molars, 10) Bilateral upper maxillary molars (third molars, second, and first left upper molars), and mandibular molars (first right, and left mandibular molars, right third molar), 11) Bilateral upper maxillary molars (first, second, third right, and left upper molars), and mandibular molars, 12) Unilateral first mandibular premolar with cleft, 13) Bilateral molars of the mandible and the upper maxilla (adolescent patient who received chemotherapy at the age of 3-years-old to treat retinoblastoma), 14) Unilateral first maxillary molar (Treacher-Collins syndrome). Conclusions: We proposed a new clinical classification of taurodontic teeth based on hypo-, meso-, and hypertaurodontism, and on different types of deciduous, and definitive teeth (42 boxes). We were first to provide free reference images for: 1) upper maxillary second premolar hypertaurodontism, 2) mandibular second premolar mesotaurodontism, 3) upper maxillary third molar meso-and hypertaurodontism, 4) mandibular first molar hypotaurodontism, 5) mandibular third molar mesotaurodontism. We were also first to freely illustrate taurodontism related with chemotherapy, cleft palate patients, and Treacher-Collins syndrome.
Źródło:
Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery; 2023, 33, 1; 1-44
2593-3604
Pojawia się w:
Nemesis. Negative Effects in Medical Sciences Oral and Maxillofacial Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The relationship of biochemical parameters and radiological parameters in the evaluation of the clinical severity of acute pancreatitis in the emergency department – a retrospective analysis
Autorzy:
Tortum, Fatma
Tekin, Erdal
Aydın, Fahri
Özdal, Emine
Tatlısu, Kübra
Powiązania:
https://bibliotekanauki.pl/articles/25102374.pdf
Data publikacji:
2023-06-30
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
acute pancreatitis
amylase
computed tomography severity index
emergency department
lipase
Opis:
Introduction and aim. Computed tomography severity index (CTSI) and Balthazar score are among the most frequently used scorings in the determination of severe acute pancreatitis. The primary purpose of this study is evaluation of the effects of biochemical parameters, Balthazar score and CTSI on mortality in acute pancreatitis. At the same time, correlations with biochemical parameters, CTSI and Balthazar score were evaluated in patients with AP. Material and methods. In this study, the amylase, lipase, CRP, and procalcitonin values of patients diagnosed with acute pancreatitis were retrospectively recorded. Contrast-enhanced computed tomography (CECT) images obtained at the time of presentation to the emergency department or within seven days of admission were re-evaluated by two radiologists. The CTSI scores and Balthazar scores of the patients were calculated. Results. The study included 240 patients. The amylase level of the patients was positively correlated with the Balthazar score at a statistically significant level (R=0.189, p=0.003). In addition, the relationship between pancreatic scoring systems and mortality, the AUC value for CTSI was 0.9 (95% CI: 0.826-0.973) and was higher than other scoring systems. Conclusion. CTSI had better performance in the prediction of mortality in patients with acute pancreatitis.
Źródło:
European Journal of Clinical and Experimental Medicine; 2023, 2; 277-282
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using an LSTM network to monitor industrial reactors using electrical capacitance and impedance tomography - a hybrid approach
Autorzy:
Kłosowski, Grzegorz
Rymarczyk, Tomasz
Niderla, Konrad
Kulisz, Monika
Skowron, Łukasz
Soleimani, Manuchehr
Powiązania:
https://bibliotekanauki.pl/articles/24200815.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
electrical tomography
industrial system
process control
LSTM networks
machine learning
Opis:
The article presents a new concept for monitoring industrial tank reactors. The presented concept allows for faster and more reliable monitoring of industrial processes, which increases their reliability and reduces operating costs. The innovative method is based on electrical tomography. At the same time, it is non-invasive and enables the imaging of phase changes inside tanks filled with liquid. In particular, the hybrid tomograph can detect gas bubbles and crystals formed during industrial processes. The main novelty of the described solution is the simultaneous use of two types of electrical tomography: impedance and capacitance. Another novelty is the use of the LSTM network to solve the tomographic inverse problem. It was made possible by taking the measurement vector as a data sequence. Research has shown that the proposed hybrid solution and the LSTM algorithm work better than separate systems based on impedance or capacitance tomography.
Źródło:
Eksploatacja i Niezawodność; 2023, 25, 1; art. no. 11
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Validation of a three-dimensional head phantom for imaging data
Walidacja trójwymiarowego fantomu głowy dla danych obrazowych
Autorzy:
Podolszańska, Jolanta
Powiązania:
https://bibliotekanauki.pl/articles/27315433.pdf
Data publikacji:
2023
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
computed tomography
FDK reconstruction
3D mathematical phantom
Shepp-Logan phantom
tomografia komputerowa
rekonstrukcja FDK
trójwymiarowy matematyczny model fantomu
fantom Shepp-Logan
Opis:
This paper presents the research results on the design of a three-dimensional head phantom for cone beam projection. The head model is based on a Shepp-Logan mathematical head model, which is used to simulate the operation of the CT scanner. The model is then compared with the reference data for structural similarity, reasoning, and shape. The geometric parameters of the obtained images are investigated. The reconstructed image is analyzed using the FDK method. The results show that the geometric parameters directly correlate with the number of projections. A mathematical framework of cone beam 3d reconstruction via the first derivative of the radon transform is presented.
W artykule przedstawiono wyniki badań nad projektem trójwymiarowego fantomu głowy do projekcji wiązki stożkowej. Model głowy jest oparty na matematycznym modelu głowy Shepp-Logan, który jest używany do symulacji działania skanera CT. Model jest następnie porównywany z danymi referencyjnymi pod kątem podobieństwa strukturalnego, rozumowania i kształtu. Badane są parametry geometryczne uzyskanych obrazów. Zrekonstruowany obraz jest analizowany przy użyciu metody FDK. Wyniki pokazują, że parametry geometryczne mają bezpośredni związek z liczbą projekcji. Przedstawiono matematyczne ramy rekonstrukcji 3D wiązki stożkowej za pomocą pierwszej pochodnej transformaty radonowej.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2023, 13, 3; 29--32
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 503

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