نتایج جستجو برای: pet expression system
تعداد نتایج: 3032677 فیلتر نتایج به سال:
In vivo Positron Emission Tomography (PET) imaging of the cystine-glutamate antiporter (system xc(-)) activity with [(18)F]FSPG is meant to be an attractive tool for the diagnosis and therapy evaluation of brain diseases. However, the role of system xc(-) in cerebral ischemia and its involvement in inflammatory reaction has been scarcely explored. In this work, we report the longitudinal invest...
UNLABELLED The assessment of myocardial radiotracer kinetics, including cardiac extraction fraction and washout, requires the study of isolated perfused hearts to avoid analytic error due to tracer recirculation and systemic metabolites. Analysis of the isolated perfused rat heart by a high-resolution small-animal PET system may offer both reliable evaluation of cardiac tracer kinetics and tomo...
GE Healthcare, Waukesha, USA A new ToF-PET/MR scanner has recently been deployed at the University Hospital of Zurich for clinical evaluation purposes. The goal of the present work was to compare the image quality obtained on this system with that of equivalent state-of-the-art standalone scanners. The GE Signa PET/MR is a whole-body scanner combining a 3T wide-bore MR system with a 25 cm PET d...
Estrogen receptor (ER) expression in breast cancer is associated with a more favorable prognosis and is necessary for a response to endocrine therapies. Traditionally, ER expression is assessed by in vitro assays on biopsied tumor tissue. However, recent advances have allowed in vivo evaluation of ER expression with (18)F-fluoroestradiol ((18)F-FES) PET. Clinical studies have demonstrated the u...
Coxiella burnetiiis an obligate and gram-negative bacteria causing query fever (Q fever) disease, despite the importance of Q fever, there is no universal vaccine against this disease. Therefore, application of the recombinant subunit vaccines which use Com1 and OmpH as immunogenic proteins can be useful in this regard. To perform the current project, Com1 an...
INTRODUCTION The gastrin-releasing peptide receptor (GRPR) is overexpressed in breast cancer. The present study evaluates GRPR imaging as a novel imaging modality in breast cancer by employing positron emission tomography (PET) and the GRPR antagonist (68)Ga-RM2. METHODS Fifteen female patients with biopsy confirmed primary breast carcinoma (3 bilateral tumors; median clinical stage IIB) unde...
Objective(s): L-4-borono-2-18F-fluoro-phenylalanine (L-[18F]FBPA), a substrate of L-type amino acid transporter 1 (LAT1), is a tumor-specific probe used in positron emission tomography (PET). On the other hand, it has not been examined whether another isomer D-[18F]FBPA accumulates specifically in the tumor. He...
The study aimed at comparing PET/MR to PET/CT for imaging the carotid arteries in patients with known increased risk of atherosclerosis. Six HIV-positive men underwent sequential PET/MR and PET/CT of the carotid arteries after injection of 400 MBq of (18)F-FDG. PET/MR was performed a median of 131 min after injection. Subsequently,PET/CT was performed. Regions of interest (ROI) were drawn slice...
AIMS Nodal expression of the carcinoembryonic antigen (CEA), cytokeratin 20 (CK20), and guanylyl cyclase C (GCC) genes was measured in tandem in patients with colorectal cancer (CRC) to assess whether there would be sufficient agreement between these markers in their ability to detect micrometastasis to qualify one of them as a universal marker, and whether frozen and paraffin wax embedded tiss...
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