Przeglądanie według Temat "magnetic resonance imaging"
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Pozycja 19F MRI As a tool for imaging drug delivery to tissue and individual cells(Wydawnictwo Uniwersytetu Rzeszowskiego, 2017) Bober, Zuzanna; Aebisher, David; Ożóg, Łukasz; Tabarkiewicz, Jacek; Tutka, Piotr; Bartusik-Aebisher, DorotaOver the past few decades, magnetic resonance imaging (MRI) has proven to be extremely successful in medical applications. More recently, the biomedical applications of MRI have been gaining more use in the field of clinical pharmacy. In 1977, perfluorocarbon compounds (PFC), which form emulsions that can carry drugs, were analyzed by 19F MRI and emulsified PFC compounds have been investigated as potential blood substitutes since the early 1960s and now a wide variety of PFC compounds are currently available as 19F MRI biomarkers. Molecules with 19F substituents are particularly attractive for use in drug tracking by 19F MRI due to 100% 19F abundance, high 19F MRI sensitivity (0.83 relative to 1H MRI) and an impressively large chemical shift range (400 ppm). Another benefit in the use of 19F MRI is a zero background signal in biological samples due to lack of endogenous fluorine. Therefore, drugs containing fluorine atom have potential for 19F MRI imaging drug delivery to tissue. This article will review recent developments in the use of 19F MRI in imaging drug delivery to tissue and individual cells.Pozycja A benign entity – cerebral multinodular and vacuolating neuronal tumor(Wydawnictwo Uniwersytetu Rzeszowskiego, 2022) Kış, Naciye; Erok, Berrin; Kılıç, Harun; Önder, HakanIntroduction and aim. Multinodular and vacuolating neuronal tumor (MVNT) of the cerebrum is a rare benign, mixed glial/ neuronal lesion which has been included in the recent (2016) World Health Organization (WHO) Classification of the central nervous system tumors.Most of the reported cases are remarkable with adult onset seizure in the literature.They can also be found incidentally in nonepilepsy patients with or without headache We aimed to present this unique entity with its typical magnetic resonance imaging (MRI) features. Description of the case. A 21-year old man presented with complaint of headache that increased in frequency within the last few months.No relevant seizure or any other signs of note.He was diagnosed with MVNT by imaging andstarted to be followed- up.The repeat MRI 6 months later showed no interval changes. Conclusion. Clinicians should be aware of that it is a do not touch lesion in asymptomatic patients with no need for biopsy or surgery and follow up imaging is sufficient when presented with the typical MRI manifestations. Surgical resection may be required for seizure control and was reported in few cases with no tumoral regrowth in the literature.Pozycja Cytisine parameters measured in the 1.5 Tesla magnetic field(Wydawnictwo Uniwersytetu Rzeszowskiego, 2020) Bober, Zuzanna; Galiniak, Sabina; Leksa, Dawid; Dynarowicz, Klaudia; Aebisher, David; Ostańska, Elżbieta; Czmil, Anna; Bar, Piotr; Bartusik-Aebisher, Dorota; Tutka, PiotrIntroduction. Cytisine, Cytisinum (C11H14N2O), is an organic chemical compound. Cytisine is heterotricyclic compound that is the toxic principle in Laburnum seeds and is found in many members of the Fabaceae (legume, pea or bean) family. Aim. The aim of the study is to measure the influence of water on the form of drug in the magnetic field 1.5 Tesla. Material and methods. For this purpose, magnetic resonance imaging tests were performed to check the solubility of pure cytisine, Desmoxan tablets and Tabex capsules. Results. From a pharmacological point of view, both Desmoxan tablets and Tabex capsules should exert the same effect on the human body, this is due to the identical content of the active substance, in this case cytisine (1.5 mg). Conclusion. The differences in the results obtained may be related to additional excipients that contain medications, but it is believed that they should not have a negative impact on the action of the active substance.Pozycja Glycosaminoglycan concentration in cancer tissue(Wydawnictwo Uniwersytetu Rzeszowskiego, 2019) Bar, Piotr; Galiniak, Sabina; Bartusik-Aebisher, Dorota; Filip, Rafał; Aebisher, DavidIntroduction. Glycosaminoglycans (GAGs) play a widespread role in tissue modelling. GAG polymers may affect several receptor pathways in parallel. Aim. To present difference in concentration of GAG in healthy and cancer tissues. Material and methods. The literature search was performed nd reviewed using selected keywords. Results. We revieved the methods of detection various types of glycans measured by Magnetic Resonance Imaging. Conclusion. MRI methodology provides an efficient tool forstudy of cellular composition. The use T1 aof T2 measurements to study cancer tissue is a promising assay.Pozycja Infliximab MRI relaxation time in solution(Wydawnictwo Uniwersytetu Rzeszowskiego, 2019) Bober, Zuzanna; Bar, Piotr; Pasternak, Grzegorz; Galiniak, Sabina; Bartusik-Aebisher, Dorota; Filip, Rafał; Aebisher, DavidIntroduction. The use of Quantitative Magnetic Resonance Imaging to drug monitoring in vitro or in vivo can provides a powerful means to map the effects of drugs on tissue activity. Aim. The purpose of this study was to measure relaxation time of antibody phantom. For this purpose, infliximab sample was used. Material and methods. The selected methods to detect relaxation time of antibody was Magnetic Resonance Imaging technique. We detected spin-lattice (T1) relaxation time and discuss differences where compare to water. Results. The measurements of spin-lattice (T1) relaxation time showed significant differences. The results obtained in phantom indicate that we can use this result for measurements of relaxation time in vitro. Conclusion. Infliximab is approved for severe cases of rheumatoid arthritis, together with methotrexate, for pronounced psoriasis and psoriasis-arthritis, ankylosing spondylitis as well as for chronic inflammatory bowel disease. We conclude, that Quantitative Magnetic Resonance Imaging can be used to monitor drug effects.Pozycja Investigation of pharmaceuticals by nuclear magnetic resonance imaging and spectroscopy(Wydawnictwo Uniwersytetu Rzeszowskiego, 2017) Bober, Zuzanna; Aebisher, David; Tabarkiewicz, Jacek; Guz, Wiesław; Tutka, Piotr; Bartusik-Aebisher, DorotaCurrently, new and easier ways of analyzing pharmaceutical drug forms and drug delivery mechanisms are being sought. Magnetic resonance imaging (MRI) is a non-invasive imaging technique that images drug forms such as tablets, liquids and topicals and drug form behavior in living organisms on both the tissue and cellular scale. The advantages of MRI include noninvasiveness, variable sample capacity and ease of transfer of phantom results to in vitro and in vivo studies. This review concerns the usefulness of clinical MRI that cannot be understated as this technique provides non-invasive and non-destructive insight into the properties of drug delivery systems. The research discussed here concerns the use of magnetic resonance, spectroscopy and chromatography to investigate selected pharmaceuticals and covers work of selecting drugs and antibodies for modification by synthesis for evaluation by MRI. Modifications have been aimed at improving therapeutic efficacy, delivery, and MRI. Modification conditions such as (pH, concentration, temperature, and the influence of other components present in the solutions) will be discussed to understand drug delivery system improvements and the reliability and repeatability of the results obtained. We hope to explore and expand the scope of pharmaceutical imaging with MRI for application in clinical medicine.Pozycja Lycopene activity on lung and kidney cancer cells by T2 relaxation time 1H Magnetic Resonance Imaging in vitro(Wydawnictwo Uniwersytetu Rzeszowskiego, 2020) Pogoda, Katarzyna; Pucka, Maria; Tabarkiewicz, Jacek; Bober, Zuzanna; Aebisher, David; Galiniak, Sabina; Bartusik-Aebisher, DorotaIntroduction. The paper presents the results of a study of cell cultures of lung cancer and kidney cancer using lycopene performed using clinical magnetic resonance imaging. Aim. The aim of the study was to evaluate lycopene activity on tumor cell cultures. Material and methods. For this purpose, MR tests were performed using the technique of determining transverse relaxation. Results. Described here studies demonstrated that lycopene may inhibit the growth of A549 and ACHN cell lines. Conclusion. We determine changes in spin lattice relaxavity T2 to monitor treatment of lung cancer cell line A549 and kidney cancer cell line ACHN cells treatment with lycopene.Pozycja Magnetic Resonance Elastography – noninvasive method to assess liver disease(Wydawnictwo Uniwersytetu Rzeszowskiego, 2017) Ożóg, Łukasz; Aebisher, David; Bober, Zuzanna; Bartusik-Aebisher, Dorota; Guz, Wiesław; Cholewa, MarianCurrently, liver disease is widespread and the awareness of these diseases is low. Early symptoms of liver disease do not necessarily indicate problems with this organ and patients are usually informed of their problems when the stage of the disease is already advanced. Invasive biopsies are the clinical diagnostic method most commonly used in the evaluation of liver disease. A biopsy is associated with a high risk of false results and additional complications. Finding new non-invasive imaging methods has led to the discovery of a new method called Magnetic Resonance Elastography (MRE). This technique allows one to evaluate the mechanical properties of tissues and to distinguish between pathological states. Testing using this technique can be performed on a conventional magnetic resonance system by using few additional components and properly prepared software. Studies have shown that there is a strong correlation between MRE-measured liver stiffness and the degree of fibrosis. MRE is also useful in characterizing liver tumors. Studies show that this technique is highly credible in both health volunteers and patients with liver fibrosis. MRE has tremendous diagnostic potential. The described technique is not currently widely used and has the potential to serve as a safe and accurate alternative in clinical diagnostics in the future.Pozycja Radio Frequency MRI coils(Wydawnictwo Uniwersytetu Rzeszowskiego, 2020) Truszkiewicz, Adrian; Aebisher, David; Bober, Zuzanna; Ożóg, Łukasz; Bartusik-Aebisher, DorotaIntroduction. Magnetic Resonance Imaging (MRI) coils technology is a powerful improvement for clinical diagnostics. This includes opportunities for mathematical and physical research into coil design. Aim. Here we present the method applied to MRI coil array designs. Material and methods. Analysis of literature and self-research. Results. The coils that emit the radiofrequency pulses are designed similarly. As much as possible, they deliver the same strength of radiofrequency to all voxels within their imaging volume. Surface coils on the other hand are usually not embedded in cylindrical surfaces relatively close to the surface of the body. Conclusion. The presented here results relates to the art of magnetic resonance imaging (MRI) and RF coils design. It finds particular application of RF coils in conjunction with bore type MRI scanners.Pozycja The larynx cancer in vitro study by MRI relaxtion time of water(Wydawnictwo Uniwersytetu Rzeszowskiego, 2020) Domka, Wojciech; Ożóg, Łukasz; Bartusik-Aebisher, Dorota; Aebisher, DavidIntroduction. Squamous cell carcinoma (SCC) of the larynx accounts for a significant percentage of all head and neck cancers. Aim. In this paper we determine the differences in magnetic resonance relaxation time (MRI) of water in cancerous and healthy larynx tissues. Material and methods. This study is aimed on T2 MRI modalities for monitoring morphology of larynx tissue. Results. Our results showed that T2 MRI relaxation time measured in larynx tissue can be used to assess early cancer condition of larynx tissues. The changes of T2 MRI correspond to tumor growth within normal tissue. Conclusion. The study showed potential of MRI for the non-invasive monitoring of larynx condition.Pozycja Zastosowanie czasów relaksacji rezonansu magnetycznego do oceny efektów terapii fotodynamicznej raka prostaty(Uniwersytet Rzeszowski, 2023-05-14) Osuchowski, MichałRak prostaty to drugi pod względem częstości występowania nowotwór złośliwy u mężczyzn. Zachorowalność na raka prostaty stale wzrasta. W Polsce stanowi on ok. 20% wszystkich rozpoznanych nowotworów złośliwych. Ze względu na skalę problemu oraz ilość opcji terapeutycznych wdrażane są nowe, innowacyjne metody leczenia dające szanse na pełne lub częściowe wyleczenie choroby. W niniejszej pracy, próbki tkankowe prostaty pobrane podczas radykalnej prostatektomii poddano terapii fotodynamicznej z wykorzystaniem różnych fotouczulaczy. Do oceny efektów terapii wykorzystano badanie histopatologiczne oraz rezonans magnetyczny o indukcji pola 1.5 Tesli. W badaniu histopatologicznym prowadzonym po terapii zaobserwowano kondensację większości komórek nowotworowych, obrzęk zrębu, zaburzenia architektoniczne w kształcie jąder, martwicę zakrzepową oraz obecność białka w zrębie. Po terapii fotodynamicznej liczba komórek nowotworowych zmniejszyła się w porównaniu z liczbą komórek nowotworowych przed terapią. Z kolei w badaniu klinicznym rezonansem magnetycznym tkanki leczone PDT miały niższe wartości czasów relaksacji T1 i T2 w porównaniu z wartościami T1 i T2 tkanek przed leczeniem. Zaobserwowane różnice były istotne statystycznie. Skrócenie wartości obu czasów mogło być spowodowane utratą wody z tkanki na skutek PDT. Obie zastosowane metody (badanie histopatologiczne oraz rezonans magnetyczny) umożliwiają ocenę efektów leczenia. Przeprowadzone eksperymenty potwierdziły skuteczność leczenia PDT, co daje szanse i nadzieje na zastosowanie tej metody również w badaniach in vivo pacjentów z rakiem prostaty.