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Page 1 from 634 results
16 beta-([18F]fluoro)estrogens: systematic investigation of a new series of fluorine-18-labeled estrogens as potential imaging agents for estrogen-receptor-positive breast tumors.
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In order to understand the structural features that might lead to an estrogen receptor (ER) based breast tumor imaging agent with improved uptake characteristics, we have synthesized several new analogs of 16 beta-fluoroestradiol (beta FES) and studied their tissue distribution in immature rats. The
Fluorine-18-labeled progestin ketals: synthesis and target tissue uptake selectivity of potential imaging agents for receptor-positive breast tumors.
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We have studied two new fluorine-substituted progestins as potential imaging agents for progesterone-receptor-positive human breast tumors. The steroids are 16 alpha, 17 alpha-fluoroacetophenone ketals of 16 alpha, 17 alpha-dihydroxyprogesterone and 16 alpha, 17 alpha,
PET imaging of breast cancer with fluorine-18 radiolabeled estrogens and progestins.
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Through the use of fluorine-18 radiolabeled estrogen receptor ligands and Positron Emission Tomography (PET), imaging of estrogen receptor-positive (ER+) breast lesions has been accomplished. Targeting the estrogen and progesterone receptors found in receptor-positive breast cancer provides a means
Target tissue uptake selectivity of three fluorine-substituted progestins: potential imaging agents for receptor-positive breast tumors.
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We have studied three new fluorine-substituted progestins (1-3) as potential imaging agents for progesterone receptor (PgR)-positive human breast tumors. Two of these are fluorine-substituted analogs of the potent progestin R5020 (promegestone), derived from (21S)-hydroxy R 5020 (RU 27987) and
Fluorine-18-fluorodeoxyglucose assessment of glucose metabolism in bone tumors.
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In our study, we investigate the glucose metabolism of various types of bone lesions with 18F-fluorodeoxyglucose (FDG) PET.
METHODS
Twenty-six patients showing clinical and radiographic symptoms of a malignant bone tumor were included. Histological examination after the PET study revealed 19
Integrated fluorine-18 fluorodeoxyglucose (18F-FDG) PET/CT compared to standard contrast-enhanced CT for characterization and staging of pulmonary tumors eligible for surgical resection.
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BACKGROUND
Accurate staging is necessary to determine the appropriate therapy in patients with lung cancer. Few studies have compared integrated fluorine-18 fluorodeoxyglucose (18F-FDG) positron emission tomography/computed tomography (PET/CT) and contrast-enhanced CT in the characterization and
[19F-MR imaging of transplanted tumor: perfluorochemicals as a fluorine tumor imaging agent].
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OBJECTIVE
The purpose of our study was to detect tumor selectively using 19F-magnetic resonance imaging (MRI) and to assess Fluosol-DA, a perfluorochemical emulsion, as a tumor imaging agent for 19F-MRI.
METHODS
SCC VII cells were transplanted in the right leg of mice. After 6 days, Fluosol-DA was
A fluorine-18 labeled progestin as an imaging agent for progestin receptor positive tumors with positron emission tomography.
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The potential of the fluorine-18 labeled progestin 21-[18F]fluoro- 16 alpha-ethyl-19-norpregn-4-ene-3,20-dione [( 18F]FENP) as an imaging agent for the in vivo assessment of progestin receptor (PR) positive neoplasms with positron emission tomography has been investigated. Tissue distribution
Fluorine-18 fluoromisonidazole tumour to muscle retention ratio for the detection of hypoxia in nasopharyngeal carcinoma.
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In vivo demonstration of hypoxia is of significance for tumour patient management. Fluorine-18 fluoromisonidazole ([18F]FMISO) is a proven hypoxic imaging agent. We developed an [18F]FMISO tumour to muscle retention ratio (TMRR) for the detection of tumour hypoxia in nasopharyngeal carcinoma (NPC).
Effect of carbogen on tumor oxygenation: combined fluorine-19 and proton MRI measurements.
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OBJECTIVE
Blood oxygen level dependent (BOLD) contrast in magnetic resonance imaging (MRI) has been widely used for noninvasive evaluation of the effects of tumor-oxygenating agents. However, there have been few tests of the validity of this method. The goal of the present work was to use the T(1)
Use of fluorine-19 nuclear magnetic resonance spectroscopy and hydralazine for measuring dynamic changes in blood perfusion volume in tumors in mice.
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BACKGROUND
One method of evaluating the mechanism of action of agents which alter tumor oxygenation is to determine their effects on tumor blood flow.
OBJECTIVE
This study tests applicability of a new approach using an emulsion of the inert fluorocarbon perfluorooctylbromide (PFOB) at nontoxic doses
Radiosynthesis and biological evaluation of fluorine-18 labeled N-acetylgalactosamine derivative [ 18 F]FPGalNAc for PET imaging of asialoglycoprotein receptor-positive tumors
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Introduction: The asialoglycoprotein receptor(ASGPR) is abundantly expressed on the surface of hepatocytes where it recognizes and endocytoses glycoproteins with galactosyl and N-acetylgalactosamine groups. ASGPR not only express on the
Preoperative fluorine 18 fluorodeoxyglucose tumoral uptake ratio between upper and lower abdomen in primary advanced-stage ovarian cancer.
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OBJECTIVE
The objective of this study was to assess whether the ratio of upper abdomen (UA) to lower abdomen (LA) (relative to the umbilicus) standardized fluorine 18 fluorodeoxyglucose uptake, as measured by preoperative positron emission tomography and computed tomography, is predictive of
Synthesis and biological evaluation of new fluorine substituted derivatives as angiotensin II receptor antagonists with anti-hypertension and anti-tumor effects.
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The synthesis and pharmaceutical activity of new potent non-tetrazole angiotensin II (Ang II) receptor antagonists were described. These compounds were fluorine substituted derivatives of Losartan, Valsartan and Irbesartan with carboxylic acid group as replacements to the known potent tetrazole
Antitumor activity of ME2303, a fluorine-containing anthracycline, against human tumors implanted in nude mice.
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A fluorine-containing anthracycline, ME2303, given intravenously once a week for 4 weeks at the maximum tolerated doses showed better therapeutic effects against 2 gastric, 3 lung and 2 human breast tumor xenografts than did adriamycin (ADM) at the maximum tolerated dose. Among the tumors, ME2303
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