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    Wyświetlanie 1-9 z 9
    Tytuł:
    Automatic volume measurement of lung nodules : optimal threshold density
    Automatyczny pomiar objętości guzów płuc : optymalna densyjność progowa
    Autorzy:
    Krzyżanowski, Konrad
    Pasławski, Marek
    Kurys, Ewa
    Opis:
    Background: The aim of the study was to assess the influence of threshold density on automatic volume measurement of lung nodules, and to determine the range of optimal threshold density for automatic volume measurement. Material/Methods: The clinical material consisted of 28 patients with lung nodule. A chest CT examination was performed in each patient. After the examination, the nodule volume was assessed using Volume CT software, enabling both manual and automatic volume measurement. The volume of each lesion was measured both automatically and manually. The automatic measurement was performed with four different threshold densities: -250, -200, -150 and -100 HU. The results from automatic measurement were compared with those from manual measurement. Results: We found an obvious relation of the results of automatic volume measurement to threshold density. The higher the threshold density, the lower the value of automatic volume measurement. The agreement of manual and automatic measurements was significantly more common in the density range from -200 to -150 HU (57%), than for the range -250 to -200HU and for range -150 to -100HU (29% and 14% respectively). Conclusions: The results of automatic volume measurement depend directly on the chosen threshold density. The value of automatic volume measurement is lower for higher threshold density. The optimal threshold density range according to our study is from -200 to -150HU.
    Dostawca treści:
    Repozytorium Uniwersytetu Jagiellońskiego
    Artykuł
    Tytuł:
    The awareness of caregivers about their children’s exposure to ionizing radiation accompanying medical procedures: the assessment study
    Autorzy:
    Jończyk-Potoczna, Katarzyna
    Pucher, Beata
    Strzelczuk-Judka, Lidia
    Buraczyńska-Andrzejewska, Beata
    Więckowska, Barbara
    Krauss, Hanna
    Biliński, Przemysław
    Wojtyła-Buciora, Paulina
    Tematy:
    children
    CT examination
    parents
    radiation protection
    ionizing radiation
    radiation dose
    Pokaż więcej
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Powiązania:
    https://bibliotekanauki.pl/articles/2161993.pdf  Link otwiera się w nowym oknie
    Opis:
    Objectives The aim of the study was a survey-based assessment concerning parents of children undergoing CT examinations and their knowledge of detailed information about procedures involved in imaging diagnostics. Material and Methods A statistical analysis of 108 surveys of parents of children undergoing CT studies in the Department of Pediatric Radiology in Poznań, Poland was done, with the use of Statistica software. Results In result of the evaluation of all subsections of the substantive question number, the majority of answers were incorrect (68–98%). No correlation between the number of CT examinations conducted for a child and the number of correct answers to substantive questions was observed. No correlation between the number of CT examinations conducted for a child and the fact of noting the examination with the use of ionizing radiation down in a child’s health certificate was stated. The statistical analysis showed that children of parents who declared that the aim of the CT examination had been explained to them better underwent more of them. Conclusions Parents are poorly informed about a radiation dose and risk related to a CT examination procedure. Int J Occup Med Environ Health. 2019;32(1):65–73
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Head computed tomography examination as a factor of radiation exposure in children treated for hydrocephalus
    Autorzy:
    Biegała, Michał
    Skoczylas, Krystian
    Matera, Katarzyna
    Grzelak, Piotr
    Staniszewska, Maria Anna
    Tematy:
    radiation protection
    effective dose
    CT examination
    hydrocephalus
    probability of induction of leukemia
    dose in CT
    Pokaż więcej
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Powiązania:
    https://bibliotekanauki.pl/articles/60182370.pdf  Link otwiera się w nowym oknie
    Opis:
    Objectives Computed tomography (CT) in children with hydrocephalus is a procedure often performed from the first days of the child’s life. It is important in diagnosing and monitoring treatment progress. Material and Methods Based on a retrospective analysis of CT scans, the level of exposure to ionizing radiation in children with hydrocephalus subjected to this study was calculated. The probability of induction and death from leukemia or other cancers as a result of CT scans was also calculated. Results The highest exposure is observed in children <1 year of age: M±SD 4.2±0.9 mSv/year. In the following years, this exposure decreases, reaching the level of 0.7±0.1 mSv/year at the age ≥11 years. This is correlated with the probability of induction of leukemia and other cancers, which is highest in the first year of life. In subsequent years, the probability decreases. The probability of dying from these cancers remains at a similar level all the time. By the age of 17 years, a patient with hydrocephalus diagnosed in infancy may receive a total effective dose of almost 21 mSv. Conclusions After analyzing exposure over the years, a significant reduction in the number of CT examinations performed and a reduction in the radiation dose received by children was found through the introduction of pediatric CT examination protocols.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Czy badanie ginekologiczne zapewnia prawidłowe ustalenie stopnia klinicznego zaawansowania w raku szyjki macicy bez badań obrazowych? Na podstawie opisu przypadku
    Does a non-imaging gynecologic examination ensure a correct determination of the clinical stage in uterine cervical cancer? Based on a case study
    Autorzy:
    Krynicki, Ryszard
    Nalewczyńska, Agnieszka
    Lindner, Bogusław
    Pałucki, Jakub
    Śpiewankiewicz, Beata
    Tematy:
    rak szyjki macicy
    figo
    badanie ginekologiczne
    mri
    badania obrazowe
    ct
    cervical cancer
    gynecologic examination
    imaging examination
    Pokaż więcej
    Wydawca:
    Medical Communications
    Powiązania:
    https://bibliotekanauki.pl/articles/1031606.pdf  Link otwiera się w nowym oknie
    Opis:
    The most common classification for uterine cervical cancer staging is based on the guidelines of the International Federation of Gynecology and Obstetrics (FIGO). A bimanual examination is performed in order to evaluate the clinical stage of uterine cervical cancer, and thus to select a treatment method. In the case of difficulties in performing the examination, such as increased tenderness, general anesthesia should be used. Imaging studies such as, for example, computed tomography (CT), ultrasound, magnetic resonance imaging (MRI) or PET-CT have not been incorporated into FIGO staging. One advantage of this classification is its applicability in any health center, although it is characterized by a rather high inconsistency with the actual state. The paper presents a case study of a patient diagnosed with uterine cervical cancer as well as the difficulty in assessing disease progression when based on FIGO classification. The patient was initially excluded from surgical treatment due to a palpable parametrial infiltration, which was later found to be imitated by a cyst containing some elements, most likely of bone origin, as revealed by a CT scan. Therefore, the patient received surgical treatment and subsequent chemoradiation. An incorrect FIGO-based assignment of the clinical stage in patients with uterine cervical cancer may lead to inappropriate therapeutic decisions, even in the setting of a multidisciplinary team with extensive experience. Therefore, it is necessary to perform imaging procedures, depending on the capabilities of a healthcare facility (abdominal and small pelvis MRI or CT), before reaching a final decision. When there are other accompanying pathological lesions present within the pelvis, the bimanual examination may fail to correctly assess cervical cancer progression.
    Najbardziej rozpowszechniona klasyfikacja oceniająca zaawansowanie raka szyjki macicy jest oparta na wytycznych International Federation of Gynecology and Obstetrics (FIGO). W celu oceny klinicznego zaawansowania raka szyjki macicy, a tym samym podjęcia decyzji o sposobie leczenia pacjentki, wykonuje się badanie dwuręczne zestawione. W przypadku trudności w jego przeprowadzeniu, np. z powodu znacznej bolesności dla pacjentki, należy je wykonać w krótkim znieczuleniu ogólnym. Protokół FIGO nie obejmuje wyników badań, m.in. tomografii komputerowej (CT), badania ultrasonograficznego, rezonansu magnetycznego (MRI) czy PET-CT. Jedną z zalet tej klasyfikacji jest możliwość zastosowania we wszystkich ośrodkach leczących, mimo iż charakteryzuje się ona dość dużą niezgodnością ze stanem faktycznym. W pracy przedstawiono opis przypadku pacjentki ze zdiagnozowanym rakiem szyjki macicy oraz trudności w ocenie zaawansowania choroby według FIGO. U pacjentki pierwotnie wykluczono możliwość przeprowadzenia leczenia operacyjnego z powodu badalnego nacieku w przymaciczu – po wykonaniu CT do planowania leczenia okazało się, iż jest on imitowany przez torbiel z elementami najprawdopodobniej kostnymi. Z tego powodu u pacjentki podjęto się leczenia operacyjnego z następową radiochemioterapią. Nieprawidłowe ustalenie stopnia zaawansowania klinicznego u chorych na raka szyjki macicy w oparciu o klasyfikację FIGO nawet w zespołach multidyscyplinarnych z dużym doświadczeniem może prowadzić do błędnych decyzji terapeutycznych. Przed podjęciem ostatecznej decyzji konieczne jest wykonanie badań obrazowych w zależności od możliwości danego ośrodka (MRI lub CT jamy brzusznej i miednicy mniejszej). Przy towarzyszących innych zmianach patologicznych w obszarze miednicy badanie ginekologiczne zestawione nie zawsze trafnie ocenia zaawansowanie raka szyjki macicy.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    COVID-19 integrated imaging: our experience and literature review
    Autorzy:
    Trovato, Piero
    De Rosa, Ferdinando
    Grimaldi, Dario
    Simonetti, Igino
    Codella, Umberto
    Verde, Francesco
    Lomoro, Pascal
    Rinaldo, Chiara
    Corvino, Antonio
    Giovine, Sabrina
    Opis:
    Purpose: To investigate the imaging features of emerging COVID-19 pneumonia on chest ultrasound, radiographs and computed tomography examinations performed at admission. In addition, we provide a review of the literature and compare our results with recent evidence regarding the imaging characteristics of this novel disease. Material and methods: From March 17, 2020 to April 25, 2020, 23 patients with real-time polymerase chain reaction (RT-PCR) assay confirmed COVID-19 were identified. All 23 patients were evaluated and admitted at San Giuseppe Moscati Hospital in Aversa, Italy. Multi-modality imaging findings were evaluated and compared. Literature research was conducted through a methodical search on PubMed. Results: Twenty-three patients were included in the study. Chest transthoracic ultrasound (US), chest X-ray (CXR), and computed tomography (CT) were performed respectively in 11, 16 and 21 patients. Chest US findings were consistent with diffuse B lines (91%), subpleural consolidations (45%), and thickened pleural line (18%). CXR showed prevalent manifestations of consolidations (50%) and hazy increased opacities (37%). Typical CT features are bilateral and multilobar ground-glass opacities (GGO). Indeed GGO were present in 100% of our patients. Consolidations were visible in 76% of our study population. Notably both GGO and consolidations had a peripheral distribution in all our patients. Other CT imaging features included crazy-paving pattern, fibrous stripes, subpleural lines, architectural distortion, air bronchogram sign, vascular thickening and nodules. Our literature review identified thirty original studies supporting our imaging chest findings. Conclusions: At admission, COVID-19 pneumonia can manifest in chest imaging as B-lines and consolidations on US, hazy opacities and consolidations on CXR, multiple GGO and consolidations on CT scan.
    Dostawca treści:
    Repozytorium Uniwersytetu Jagiellońskiego
    Artykuł
      Wyświetlanie 1-9 z 9

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