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Página 1 a partir de 104 resultados
18-Fluorine-labelled 2-deoxy-2-fluoro-D-glucose positron emission tomography/computed tomography standardised uptake values: a non-invasive biomarker for the risk of metastasis from choroidal melanoma.
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OBJECTIVE
To correlate the clinical, ultrasound and pathological features of the eyes first evaluated by 18-fluorine-labelled 2-deoxy-2-fluoro-d-glucose (FDG) positron emission tomography (PET)/computed tomography and then enucleated for choroidal melanoma.
METHODS
14 consecutive patients enucleated
Prediction of chemotherapy response by PET-CT in osteosarcoma: correlation with histologic necrosis.
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BACKGROUND
The current standard for neoadjuvant chemotherapy (NACT) response evaluation in osteosarcoma is histopathologic necrosis (HN). However, it is accessible only after NACT completion and may get affected by confounding factors. Thus, noninvasive surrogate such as
Does tumour necrosis factor-alpha inhibitor infliximab induce histological resolution of pulmonary sarcoid granulomas?
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BACKGROUND
Sarcoid granuloma formation involves the orchestration of cytokines and chemokines, which modulate the host's immune response to the antigen stimulus. The release of cytokines enhances expression of the pro-inflammatory cytokine tumour necrosis factor-alpha (TNF), which plays a crucial
Tumor necrosis in osteosarcoma: inclusion of the point of greatest metabolic activity from F-18 FDG PET/CT in the histopathologic analysis.
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OBJECTIVE
To determine if the location of the point of maximum standardized uptake value (SUVmax) being included in or not included in the histopathologic slab section corresponded to tumor necrosis or survival.
METHODS
Twenty-nine osteosarcoma patients underwent post-chemotherapy
In vivo determination of tumor oxygenation during growth and in response to carbogen breathing using 15C5-loaded alginate capsules as fluorine-19 magnetic resonance imaging oxygen sensors.
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OBJECTIVE
The objective was to present a method for the repeated noninvasive measurement of tumor oxygenation (Po(2)) over the whole period of tumor growth.
METHODS
A mixture of tumor homogenate (GH3 prolactinoma) and alginate capsules loaded with perfluoro-15-crown-5-ether (15C5) was injected into
Chronic contained rupture of abdominal aortic aneurysm (CCR-AAA) with massive vertebral bone erosion: computed tomography (CT), magnetic resonance imaging (MRI) and fluorine-18-fluorodeoxyglucose positron emission tomography (FDG-PET) findings.
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A 62-year-old male presented with sudden onset of low back and right leg pain. Contrast-enhanced computed tomography demonstrated an abdominal aortic aneurysm (AAA), along with a large mass lesion causing vertebral body erosion. Magnetic resonance imaging (MRI) suggested that the mass lesion
Fluorine 18 fluorodeoxyglucose PET/CT volume-based indices in locally advanced non-small cell lung cancer: prediction of residual viable tumor after induction chemotherapy.
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OBJECTIVE
To study whether volume-based indices of fluorine 18 fluorodeoxyglucose positron emission tomographic (PET)/computed tomographic (CT) imaging is an accurate tool to predict the amount of residual viable tumor after induction chemotherapy in patients with locally advanced non-small cell
[Protective effect of a zeolite enterosorbent in fluorine intoxication].
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OBJECTIVE
To reveal the structural basis of protective influence of the natural ceolite enterosorbents in fluorine intoxication.
METHODS
Fluorine effect was realized by exposure of 15 rats of Vistar's line in electrolysis shops of an aluminium plant. 15 animals were in normal ecological conditions
Imaging modalities in high-grade gliomas: pseudoprogression, recurrence, or necrosis?
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High grade gliomas (HGG) frequently recur regardless of treatment. Radiological detection of progressive disease (PD) is challenging due to the possibility of therapy-related MRI changes including: pseudoprogression (PP) and radiation necrosis (RN). Both may mimic PD. We undertook a literature
In situ assessment of tumor vascularity using fluorine NMR imaging.
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In situ fluorine NMR imaging has been used to measure vascularity in subcutaneously implanted mammary tumors. Oxyferol, a perfluorinated blood substitute comprised of an emulsion of 25% w/v perfluorotributylamine, was used as a tracer. Following iv administration, this perfluorocarbon emulsion
Liver Metastasis of Lung Cancer Detected with Similar Uptake Pattern on Bone Scintigraphy and Fluorine-18 Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography: What's the Pathophysiologic Mechanism?
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Bone scintigraphy with 99mTc diphosphonates may exhibit extraosseous lesions in addition to metastatic lesions. Multiple factors can affect extraosseous 99mTc methylene diphosphonate (MDP) uptake. Similar uptake pattern of 99mTc MDP and fluorine-18 fluorodeoxyglucose (18F FDG) in hepatic metastasis
Intense PET signal in the degenerative necrosis superimposed on chronic pancreatitis.
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Although fluorine-18 deoxyglucose-positron emission tomography (FDG-PET) is a sensitive diagnostic modality in detecting malignant tumors, differential diagnosis of malignant tumors from inflammatory lesion is challenging. We experienced a case of acute degenerative necrosis superimposed on chronic
Phenylphthalimides with tumor necrosis factor alpha production-enhancing activity.
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Phenylphthalimides (2-phenyl-1H-isoindole-1,3-diones) were prepared and their effects on tumor necrosis factor alpha (TNF-alpha) production by human leukemia cell line HL-60 stimulated with 12-O-tetradecanoylphorbol-13-acetate (TPA) were examined. An analysis of the structure-activity relationships
Quantification of vascular damage in acute kidney injury with fluorine magnetic resonance imaging and spectroscopy.
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OBJECTIVE
To design a fluorine MRI/MR spectroscopy approach to quantify renal vascular damage after ischemia-reperfusion injury, and the therapeutic response to antithrombin nanoparticles (NPs) to protect kidney function.
METHODS
A total of 53 rats underwent 45 min of bilateral renal artery
Studies on the toxicology of fluorine compounds. I. Histological and histochemical investigations on the liver, heart, lungs, and stomach of rats exposed to hydrogen fluoride.
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The liver, heart, lungs, and stomach of rats exposed to hydrogen fluoride were studied. Histological examination showed partial liver necrosis and emphysema. Using histochemical methods the effect of fluorine ions was found in: a reduction of the activity of succinic and beta-hydroxybutyric
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