Tag: "tracer" at medical news
More exhaust inhaled by kids inside school buses than by others in the area, says new UC study
...es tested for sulfur hexafluoride, a gas used as a tracer
because it can be picked up at levels as low as 10...y the emissions of other vehicles on the road, our tracer
gas measurements revealed that a significant amount of the pollutants found inside the buses origina...
Patients may want to skip that cup of coffee before undergoing PET/CT scans
...take and myocardial uptake, which is the amount of tracer
used during PET/CT that can be detected by the who...most commonly FDG (Fluorodeoxyglucose), which is a tracer
that goes into the heart to provide a picture of the organ's function on PET scans. If a person exer...
4D proton therapy, radiation-resistant tumors, interpreting medical images
... tracers work as intended. They compare how a PET tracer
distributes itself in a tumor to the distribution of a proven marker of hypoxia, such as the chemical pimonidazole. In animal studies of prostate tumors, they found that two specific PET tracers were reliable and one was not. By validating PET tra...
Scans may help pin down tricky diagnosis
...this study. Detectors showed that the radioactive tracer
was taken up by the heart muscle tissue of the tra...r cause, in addition to type of organ involved and tracer
type, of scintigraphic variability in cardiac amyloidosis: this is a highly relevant consideration f...
Study shows new imaging tracer clarifies cause of chest pain up to 30 hours after pain stops
...ons in the heart and other organs. The radioactive tracer
evaluated for this study, known by the brand name ...oton Emission Computed Tomography) to evaluate the tracer
in this study. The heart normally uses fatty acid as its primary fuel source for energy. Decreased...
How the neuron sprouts its branches
...e the longest dendrite." The researchers also used tracer
molecules to track the molecular cargo secreted by the Golgi, said Ehlers. "We saw very clearly that this cargo that originates in the Golgi gets directed towards the one longest dendrite in a highly preferential way," he said. "As cargo comes out of...
New study demonstrates combined techniques to detect, monitor Alzheimer's disease
...ool of Medicine and used a newly developed imaging tracer
for beta-amyloid from investigators at the ADRC at the University of Pittsburgh. Both ADRCs are funded by the NIA. The study included 24 people ages 48 to 83 years who were cognitively normal or had very mild, mild, or moderate dementia. The research...
New insight into machinery of immune cells' 'tentacles'
...ymerization in other cells, said Pendergast. Using tracer
molecules to tag the proteins in T cells, the researchers found that both Abi and Wave homed in on sites of actin filament formation. What's more, when the scientists activated T cells with a "superantigen," they detected Abi at the contacts between ...
Increased role for PET imaging could improve cancer care
...ique that uses radioactivity emitted from injected tracer
chemicals to measure and image biological activity. The most commonly used PET radiotracer is fluorodeoxyglucose (FDG), a radiolabeled form of glucose, which is consumed more avidly by tumors than by normal tissue. In fact, Juweid's work already has ...
Mental stress effects on heart more common than previously known
...ssure. But a minute into the speech, a radioactive tracer
was injected into the patients. On the images then produced of blood flow in the heart muscle, six of the 29 patients showed signs of ischemia. "If we didn't have the radionuclide imaging procedure, we would not have been able to tell whether the pat...
Dangerous glucose-hungry cervical tumors can be detected using PET scans
... scans monitor the amount of a radioactive glucose tracer
absorbed by cells, so the brightness of the image reveals how much glucose a tumor takes up. The results of the research team's analysis indicate that PET scans can be used to better determine prognosis in cervical cancer patients. "Cervical tumors v...
Depressed monkeys may help scientists understand human depression
...e brain, was used to scan 11 areas of the brain. A tracer
that binds to this serotonin receptor was injected...to a vein of each subject. The areas in which the tracer
binds in the brain light up bright yellow during the PET scan. The depressed monkeys had lower serot...
Study reveals biochemical signature of cocaine craving in humans
...ignal from any bound radiotracer so that levels of tracer
bound to receptors can be compared with levels in ...rise, this "endogenous" dopamine competes with the tracer
for binding sites, so less radiotracer can bind to the receptors. Therefore, the lower the bound tra...
Warm blanket lessens chances of false-positives in cancer scans
...arm in cold temperatures. But accumulations of the tracer
that is used to identify malignancies during PET/CT scans that appear in brown fat can mimic cancer or even mask the appearance of cancer in areas such as the lymph nodes. New research presented by Osman, co-author Scott Huston and other Saint Louis...
New objective criteria improve PET scan reliability in detecting breast cancer metastasis
...than normal cells, FDG accumulates in them and the tracer
makes them visible on the PET scan. The key to ...gnosis, according to the article, is the amount of tracer
uptake a "standardized uptake value" (SUV). At Cedars-Sinai, axillary nodes with SUVs of 2.3 or gre...
Studies highlight advances in diagnosis, medical therapy
...ned in a 2:1 ratio to regadenoson plus radioactive tracer
(in preparation for nuclear scanning) or to matching placebos. All patients performed mild exercise. In the end, the randomization scheme resulted in 39 patients in the regadenoson-exercise-nuclear scanning group and 21 patients in the double placebo...
New perspective on brain function now possible
...m. This is because there has not been any suitable tracer
that can bind specifically to the receptors in the glutamate system. In collaboration with Karolinska Institutet, AstraZeneca has now developed such a tracer, which makes it possible for the first time to study the glutamate system in the brains of...