نتایج جستجو برای: 18ffdg petct
تعداد نتایج: 100 فیلتر نتایج به سال:
The contribution of 18F-FDG uptake by endothelial cells to uptake values measured by PET in various tissues is as yet unclear. We therefore sought to characterize 18F-FDG uptake in an in vitro model of human endothelial cells. Methods: Commercially obtained human umbilical vein endothelial cells (HUVECs) were seeded in 6-multiwell plates 48–96 h before incubation with 1–2 MBq 18F-FDG per well. ...
A 44-year-old female patient presented symptoms and laboratory data consistent with a Cushing’s syndrome. Endocrine investigations and negative pituitary imaging were suggestive of ectopic ACTH secretion. Therefore, the patient underwent fluorine18-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) and somatostatin receptor scintigraphy (SRS) searching for the ...
Purpose: To determine the value of diffusion-weighted MRI (DWI-MRI) for pretherapeutic imaging of fluorodeoxyglucose (FDG)-avid lymphoma and lymphoma with variable FDG avidity. Experimental Design: Treatment-na€ ve patients with lymphoma who were referred for whole-body staging were included in this prospective study. Group A included patients with FDG-avid lymphoma (e.g., Hodgkin, diffuse larg...
PURPOSE To retrospectively evaluate the utility of positron emission tomography-computed tomography (PETCT) in the diagnosis of percutaneous endoscopic gastroscopy (PEG) site metastases in head and neck cancer. MATERIALS AND METHODS From the database of 250 patients of head and neck cancer who were referred for PET-CT over 2 years (from January 2005 to January 2007), 6 patients who had PEG tu...
The reconstruction of PET brain data in a PET/MR hybrid scanner is challenging in the absence of transmission sources, where MR images are used for MR-based attenuation correction (MR-AC). The main challenge of MR-AC is to separate bone and air, as neither have a signal in traditional MR images, and to assign the correct linear attenuation coefficient to bone. The ultra-short echo time (UTE) MR...
A critical step in radiotherapy treatment planning process is to accurately locate the tumor and determine its extent. Variability in gross tumor volume (GTV) delineation is a major source of systematic error in conformal radiotherapy. CT scan is the principle source of imaging data used for defining GTV for planning conformal therapy. CT is widely available less costly and compatible with radi...
The present thesis is focused on the development and application of narrow scanned high energy photon beams for radiation therapy. The introduction of physically and biologically optimized intensity modulated radiation therapy (IMRT) requires a flexible and accurate dose delivery method to maximize the treatment outcome. Narrow scanned photon beams is a fast option for IMRT since it is not depe...
To the Editor: Advanced renal cell carcinoma (RCC) has a poor prognosis when surgically untreatable. Medical treatment remains unsatisfactory. Target therapies may provide alternative options and, among them, sorafenibmay improve the progression-free survival compared with standard treatment1,2. We report a complete clinical response following sorafenib treatment in a 74year-old man with thyroi...
Lymphoma presenting with enlarged adrenal glands is not common. According to the literature, most adrenal lymphomas do not have extra-adrenal sites. We examined a 47-year-old male patient because of abdominal pain-an unusual presentation of adrenal lymphoma. Following ultrasonographic examination that showed bilateral massively enlarged adrenal glands, the patient underwent F-18 FDG PETCT. Writ...
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