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    Wyświetlanie 1-8 z 8
    Tytuł:
    Carotid Body Tumor – radiological imaging and genetic assessment
    Autorzy:
    Berger, Greta
    Łukasiewicz, Adam
    Grinevych, Vitalii
    Tarasów, Eugeniusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1391815.pdf
    Data publikacji:
    2020
    Wydawca:
    Index Copernicus International
    Tematy:
    angiography
    Carotid Body Tumor
    computed tomography
    germline mutations
    magnetic resonance
    paraganglioma
    Opis:
    Carotid Body Tumor i.e. Paraganglioma is a challenging entity from the point of view of multidisciplinary diagnosis. The main treatment option, i.e. surgery, yields intraoperative risk related to cranial nerve palsy and vascular morbidity. Bifurcation of the common carotid artery, especially at the carotid body, is the place were head and neck paraganglioma is most frequently seen, i.e. in 60% of cases [15]. Indeed, the knowledge of genetic germline SDH mutations, which cause deregulation of hypoxiainduced factors, allows for better understanding of the tumor nature. It is recommended to conduct selective neck dissection in regions IIA, IIB, III to exclude malignant transformation and metastasis, due to malignant potential of carotid body tumors, especially in case of SDHB mutation. SDHD mutation is the main cause of hereditary HNPGLs. Computed tomography (CT), magnetic resonance imaging (MRI) and angiography allow for thorough assessment of paraganglioma extension. In large tumors embolization of the supplying artery under guidance of angiography may be considered. In case of carotid body tumor, differential diagnosis should include: carotid artery aneurysm, lymphadenopathy, Schwannoma of the hypoglossal nerve or accessory thyroid gland.
    Źródło:
    Polish Journal of Surgery; 2020, 92, 6; 39-44
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Factors determining the best surgical exposure and safe clip positioning in surgical treatment of anterior communicating artery (AComA) aneurysms – particular significance of AComA complex rotation in the axial plane
    Autorzy:
    Świątnicki, Wojciech
    Radomiak-Załuska, Anna
    Heleniak, Mariusz
    Komuński, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/1392107.pdf
    Data publikacji:
    2019
    Wydawca:
    Index Copernicus International
    Tematy:
    computed tomography angiography
    intracranial aneurysms
    subarachnoid hemorrhage
    vascular spatial orientation
    Opis:
    Introduction: The aim of this study was to evaluate whether Anterior Communicating Artery (AComA) complex rotation in axial plane may influence the ease of surgical exploration in this region and safety of clip positioning when left vs right-sided approach is compared. Materials and methods: This is a retrospective study based on analysis of patients operated due to AComA aneurysm, both ruptured and unruptured. AComA complex position in relation to coronal plane was evaluated using 3D-CTA VR reconstructions. Next, comparison between surgical approach from the side where A1-A2 junction (angle) was located anterior and posterior to coronal plane was performed in relation to surgical difficulties and intra- and postoperative complications. Results: Subgroup statistical analysis revealed that there is a strong and statistically significant correlation between AComA complex rotation and surgical difficulties expressed by the need of repeated temporary clip application and brain transgression. When anterior vs posterior angle side approach was compared in relation to surgical difficulties and complications, there was a statistically significant difference with strong correlation (p < 0.05) in favour of posterior angle side approach. Interestingly, in 72.7% and 45.5% of patients that were operated from the side where A1-A2 junction was located posterior to coronal plane, the approach was performed form the side of a non-dominant A1 and aneurysm dome projection side, respectively. Conclusions: Despite its limitations, our results suggest that microsurgical clipping strategy of AComA aneurysms should at least include AComA complex rotation in axial plane, besides well acknowledged factors, when deciding from which side these lesions will be approached.
    Źródło:
    Polish Journal of Surgery; 2019, 91, 6; 6-10
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Level-set based segmentation of carotid arteries in computed tomography angiography images
    Autorzy:
    Pięciak, T.
    Baran, M.
    Urbańczyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/333312.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
    Tematy:
    segmentacja obrazu
    zbiór poziomu progowego
    angiografia tomografii komputerowej
    tętnice szyjne
    image segmentation
    threshold level set
    fast marching method
    computed tomography angiography
    carotid arterie
    Opis:
    In this paper a segmentation algorithm of carotid arteries on computed tomography angiography (CTA) images is proposed. The algorithm is based on the threshold level set approach. In the basic version, the algorithm analyzes CTA slices beginning at the brachiocephalic trunk and going towards carotid arteries. Second variant of the algorithm performs segmentation in the opposite direction, which implies that the algorithm can follow branches e.g. subclavian arteries. The localization process of the initial contour, for threshold level set method, on the first slice is based on curvature anisotropic diffusion filter, the Gaussian filter and fast marching method. The article contains segmentation results for tested sets of method parameters. Experimental results show that optimal set of parameters ensuring that the threshold level set method performs segmentation of the entire subclavian arteries, does not exist.
    Źródło:
    Journal of Medical Informatics & Technologies; 2011, 17; 281-286
    1642-6037
    Pojawia się w:
    Journal of Medical Informatics & Technologies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphometric study of the bilateral middle cerebral arteries in patients with a unilateral aneurysm
    Autorzy:
    Siedlecki, Zygmunt
    Nowak, Karol
    Śniegocki, Maciej
    Grzonkowska, Magdalena
    Baumgart, Mariusz
    Wiśniewski, Marcin
    Szpinda, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/1197577.pdf
    Data publikacji:
    2021-05-25
    Wydawca:
    Gdański Uniwersytet Medyczny
    Tematy:
    computed tomography angiography
    intracranial aneurysm
    middle cerebral artery
    morphometry
    Opis:
    Background: The middle cerebral artery (MCA) supplies a major part of the brain and is of considerable clinical importance as a common location of intracranial aneurysms. The aim of the present study was to analyze the bilateral MCAs in patients with unilateral aneurysms. Material and methods: Images of computed tomography angiography of 45 patients were analyzed. The morphometric parameters of MCA were measured. The measured parameters of the normal MCAs were compared with MCAs containing aneurysms located in the main trunk division. Results: No significant differences in the length of trunk and angles between the middle and anterior cerebral arteries were found between the non-affected and aneurysmatic MCAs. Concerning arteries with aneurysms, more branches originating from the main trunk division were found more frequently. The coexistence of the more frequent trifurcation of the MCA and an aneurysm constitutes evidence of greater anatomical variability of this arterial area in cases with a concomitant vascular malformation. Conclusions: This finding is consistent with literature data, showing the relationship between aneurysms and arterial variability and the fact that aneurysms are most often located at arterial divisions.
    Źródło:
    European Journal of Translational and Clinical Medicine; 2021, 4, 1; 29-34
    2657-3148
    2657-3156
    Pojawia się w:
    European Journal of Translational and Clinical Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Predicting heart attack in a patient post-radiation therapy using plaque CCTA analysis and serum biomarker test. Case report
    Autorzy:
    Tariq, Hassan
    Amin, Shetal
    Singh, Millee
    Morales-Pabon, Cesar Alberto
    Cahill, Kristina Vanessa
    Harrison, Eric Edward
    Powiązania:
    https://bibliotekanauki.pl/articles/1065794.pdf
    Data publikacji:
    2014
    Wydawca:
    Medical Education
    Tematy:
    cardiac biomarkers
    chest irradiation
    coronary artery disease
    coronary computed tomography angiography
    myocardial infarction risk assessment
    plaque characterization
    Opis:
    Accelerated coronary artery disease (CAD) is a long term manifestation of chest irradiation that may progress to acute myocardial infarction (MI). We report the use of an algorithm-based biomarker test and coronary computed tomography angiography (CCTA) to identify accelerated CAD in a patient treated with chest irradiation and combination chemotherapy for non-Hodgkin’s lymphoma (NHL). Using a seven protein biomarker test with four incorporated clinical factors, we identified the patient had a 6 fold higher risk for future MI than expected for individuals at his age. Using CCTA, we characterized his plaques based on the following parameters: percent diameter stenosis (ranging from 30–70), percent area stenosis, percent necrotic core (NC), percent fibrotic core (FC), percent calcium core (CC), FC thickness, percent vessel wall to lumen, and NC to FC ratio. We identified a plaque in his left circumflex (LCX) with moderate percent diameter stenosis, high percent NC, low percent FC, absent FC thickness, high percent vessel wall to lumen ratio, and high NC to FC ratio as the most vulnerable to rupture and cause MI. The patient was educated about his risk of a future MI and started on maximum medical therapy. Nevertheless, he experienced a ST elevation MI (STEMI) in 185 days with occlusion at the vulnerable plaque site of his LCX. The recognition of a vulnerable plaque in a vulnerable patient may necessitate prophylactic stenting in vessels without severe obstruction. The serum biomarker test and CCTA plaque analysis may detect these patients in need of aggressive therapy.
    Źródło:
    OncoReview; 2014, 4, 2; A54-61
    2450-6125
    Pojawia się w:
    OncoReview
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preoperative assessment of the risk of cavernous ICA injury in endoscopic transsphenoidal surgery
    Autorzy:
    Berger, Greta
    Łukasiewicz, Adam
    Grinevych, Vitalii
    Milewska, Anna Justyna
    Tarasów, Eugeniusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1391789.pdf
    Data publikacji:
    2020
    Wydawca:
    Index Copernicus International
    Tematy:
    adenoma
    cavernous segment (C4) of internal carotid artery (ICA)
    computed tomography angiography (CTA)
    endoscopic endonasal transsphenoidal surgery
    magnetic resonance angiography (MRA)
    pituitary gland
    Opis:
    In endoscopic endonasal transsphenoidal procedures, ICA injury occurs in up to 3.8% [1]. The highest hazard of injury is in case of contact between the ICA and pituitary gland, during opening of the dura. Preoperative imaging, i.e. CTA, MRA, supports objectively intraoperative techniques of imaging. CTA as well as MRA are essential to access anatomic details in variability of cavernous segments of the ICA (C4 ICA). The aim of the study was to measure the space between Internal Carotid Arteries and distances between the pituitary gland and ICA on both sides. Anatomic relations between left and right ICAs were accessed on CTA (coronal scans) at levels: A – The most concave point of the C4–C5 bend; B – The most convex point of the C4 bend; C – The C4 posterior ascending portion. Distances between pituitary gland and ICAs were measured on both sides on MRA (axial scans): A’ – The most concave point of C4–C5 bend; B’ – The most convex point of the C4 bend. The Statistica 13 (StatSoft) software was used for the statistical analysis. The Mann-Whitney U test was applied to determine differences between the groups. To analyze the strength of correlations between the quantitative variables, Spearman’s rank correlation coefficients were calculated. The results were considered statistically significant at the level of P < 0.05. Distance reduction was shown between pituitary glands and cavernous segment (C4) of ICAs on both sides, which is related to age. This has impact on surgical planning and highlights the risk of intraoperative injury of ICAs.
    Źródło:
    Polish Journal of Surgery; 2020, 92, 2; 1-7
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rozwarstwienie tętnicy kręgowej – etiologia, objawy i leczenie
    Vertebral artery dissection – aetiology, clinical features and treatment
    Autorzy:
    Chojdak-Łukasiewicz, Justyna
    Dziadkowiak, Edyta
    Bladowska, Joanna
    Paradowski, Bogusław
    Powiązania:
    https://bibliotekanauki.pl/articles/1053045.pdf
    Data publikacji:
    2014
    Wydawca:
    Medical Communications
    Tematy:
    rozwarstwienie tętnicy kręgowej
    udar niedokrwienny mózgu
    uraz szyi
    ból głowy
    angiografia tomografii
    komputerowej
    vertebral artery dissection
    ischaemic stroke
    neck trauma
    headache
    computed tomography angiography
    Opis:
    Dissection of the extracranial carotid and vertebral arteries is responsible for 2–3% of all strokes and for 20% of ischaemic events in the population of young people under the age of 45. Vertebral artery dissection is a very rare yet serious condition. The annual overall incidence of vertebral artery dissection is estimated at 1 to 1.5 per 100 000 persons. Its clinical manifestation is very nonspecific and diverse. The most typical clinical sign is sudden unilateral headache accompanied by neck pain. Other symptoms include systemic and non-systemic headaches as well as infarction or transient ischaemic attack in posterior circulation territorial area inn case where the intracranial vertebral artery dissection is associated with subarachnoid haemorrhage. The aetiology of dissection remains unclear and connected with multiple risk factors. Vertebral artery dissection can be caused by blunt force trauma of the head or neck or it can be spontaneous. The aetiology of spontaneous vertebral artery dissection includes vascular and genetic factors as well as structural defects of the arterial wall associated with connective tissue disorders. The diagnosis of vertebral artery dissection has to be established based on anamnesis, clinical features and imaging examination. Catheter cerebral angiography is the gold standard of diagnosis of arterial dissection, but also computed tomography angiography has been proven to have a very high sensitivity and specificity. In most cases extracranial vertebral artery dissection carries a good prognosis. The treatment of vertebral artery dissection is conservative and includes the use of anticoagulation and antiplatelet drugs. Surgical or endovascular treatment can be applied only for selected and small group of patients. Authors emphasize that clinical features can be very unspecific and vertebral dissection may be misdiagnosed especially in the first hours following the manifestation of symptoms. Vertebral artery dissection should be taken into consideration in the diagnosis of stroke in young persons despite unspecified symptoms and without traumatic history.
    Rozwarstwienie tętnic dogłowowych w odcinku zewnątrzczaszkowym odpowiada za 2–3% wszystkich udarów niedokrwiennych i 20% incydentów niedokrwiennych w populacji osób poniżej 45. roku życia. Rozwarstwienie tętnicy kręgowej występuje stosunkowo rzadko, z roczną częstością 1–1,5 na 100 tys. osób, ale wiąże się z poważnymi konsekwencjami. Obraz kliniczny jest bardzo niespecyficzny i zróżnicowany. Najczęstszy objaw to nagły, jednostronny ból głowy, któremu może towarzyszyć ból szyi. Wymienia się także zawroty głowy o charakterze układowym i nieukładowym oraz objawy wynikające z udaru bądź przejściowego niedokrwienia w tylnym obszarze unaczynienia mózgu, gdy rozwarstwienie dotyczy odcinka zewnątrzczaszkowego naczynia, lub krwotoku podpajęczynówkowego – w przypadku rozwarstwienia wewnątrzczaszkowego odcinka tętnicy kręgowej. Etiologia rozwarstwienia jest różnoraka, związana z wieloma czynnikami. Wyodrębnia się rozwarstwienie urazowe, spowodowane najczęściej tępym urazem głowy i/lub szyi, oraz rozwarstwienia spontaniczne (samoistne). W przypadku rozwarstwienia samoistnego bierze się pod uwagę czynniki naczyniowe i genetyczne oraz zaburzenia w budowie ściany naczynia związane z chorobami tkanki łącznej. W przypadku podejrzenia rozwarstwienia tętnicy kręgowej rozpoznanie ustala się na podstawie wywiadu, objawów klinicznych i badań obrazowych. Złotym standardem diagnostycznym pozostaje klasyczna angiografia naczyń dogłowowych, a wśród badań nieinwazyjnych angiografia tomografii komputerowej wykazuje 100-procentową swoistość i czułość. W większości przypadków rozwarstwienie tętnicy kręgowej w odcinku zewnątrzczaszkowym wiąże się z dobrym rokowaniem. Leczenie ma charakter zachowawczy i obejmuje terapię lekami przeciwzakrzepowymi lub przeciwpłytkowymi. Leczenie chirurgiczne i wewnątrznaczyniowe stosuje się w określonych grupach pacjentów. Co ważne, nietypowe objawy kliniczne w początkowym okresie rozwarstwienia naczynia utrudniają diagnozę. Rozwarstwienie tętnicy kręgowej powinno być brane pod uwagę w przypadku udaru mózgu u osoby młodej, mimo niecharakterystycznych objawów i braku urazowego wywiadu.
    Źródło:
    Aktualności Neurologiczne; 2014, 14, 4; 250-256
    1641-9227
    2451-0696
    Pojawia się w:
    Aktualności Neurologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Use of Duplex Ultrasound Arterial Mapping (DUAM) and Preoperative Diagnostics in Patients with Atherosclerotic Ischaemia of Lower Extremities
    Autorzy:
    Gabriel, Marcin
    Pawlaczyk, Katarzyna
    Szajkowski, Rafał
    Stefaniak, Karolina
    Dzieciuchowicz, Łukasz
    Krasiński, Zbigniew
    Powiązania:
    https://bibliotekanauki.pl/articles/1396692.pdf
    Data publikacji:
    2012-06-01
    Wydawca:
    Index Copernicus International
    Tematy:
    atherosclerotic ischemia of the lower extremities
    preoperative diagnostic
    duplex scan
    angiography
    computed tomography
    Opis:
    In spite of the fact duplex Doppler ultrasonography is recognized as an scanning technique equivalent to other imaging methods for preoperative diagnostics of the lower extremity arteries, in many centres its use is limited to screening.The aim of the study was to the determine usefulness of arterial duplex mapping for preoperative diagnostics in patients with peripheral artery occlusive disease (PAOD)Material and methods. In 2008-2009, 103 patients with PAOD symptoms (129 limbs) were examined in a prospective, non-randomized study. DUAM was performed in all limbs, DSA in 90, CT-angio in 29, and revascularisation procedures in 116 limbs.Results. Problems with completing DUAM occurred in 10,1% of cases, including 1.5% of examinations of no diagnostic value. Consistency of DUAM and DSA results was found in 94.6% of cases, and consistency of DUAM results and the range of actually performed ranges was found in 97.8% of cases. Consistency of DUAM and CT-angio results was recorded in 68.0% of cases. The comparison between individual examinations and the actually performed procedures showed consistency of 96.5% for DUAM and 72.4% for CT-angio.Conclusions. DUAM usefulness for detecting and defining lesions in lower extremity arteries is similar to that of DSA and CT-angio. This examination may be successfully used in preoperative diagnostics, particularly for intravascular procedures, which makes possible to reduce exposition to radiation and minimalize diagnostics costs.
    Źródło:
    Polish Journal of Surgery; 2012, 84, 6; 276-284
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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