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Discover 19,983 clinical trials near Maryland. Find research studies in your area.
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NCT01793532
Background: \- Some people with epilepsy have an epileptic focus, a small part of the brain that is the starting point of the seizure. This focus is like an irritant or an inflammation, and helps cause the seizure. People with epilepsy that affects the temporal lobe of the brain often have an epileptic focus. Researchers want to look at the epileptic focus by using a drug that attaches to a protein associated with inflammation. An imaging study with the drug will show how much inflammation is in the area of the brain where the seizures start. The drug, called \[11C\]DPA-713, will be tested for its effectiveness in people with temporal lobe epilepsy. Its effects will be compared with imaging studies given to healthy volunteers. Objectives: \- To see if \[11C\]DPA-713 can show the inflammation in the epileptic focus of seizures. Eligibility: * Individuals at least 18 years of age who have temporal lobe epilepsy. * Healthy volunteers at least 18 years of age. Design: * Participants will have three outpatient visits to the National Institutes of Health Clinical Center. The visits will last from 2 to 5 hours. * Participants will be screened with a physical exam, neurological exam, and medical history. Blood samples will be collected before the start of the study. * Participants will have a positron emission tomography (PET) scan. This scan will be used to look at brain chemistry and function. The study drug will be given during the scan to see how well it shows points of inflammation in the brain. Some participants will provide additional blood samples during the PET scan. * Participants will also have a magnetic resonance imaging (MRI) scan. This scan will look at the structure of the brain.
NCT00720460
This study will test new techniques to image the heart, blood vessels, and legs using magnetic resonance imaging (MRI). The techniques will be used to plan and guide treatments using minimally invasive methods. Healthy normal volunteers 18 years of age and older may be eligible for this study. For MRI, the subject lies flat on a table that can slide in and out of the scanner, a metal cyclinder. Special antennas, covered in pads, are placed against the subject s body. The scan time can vary from 20 minutes to 2 hours, with most scans lasting between 45 and 90 minutes. The subject may be asked to wear adhesive patches on the chest for monitoring the heart and a belt or finger pad for monitoring breathing. During the test, a contrast agent called gadolinium may be injected. This substance brightens the heart and arteries during the scan, providing a better picture of blood flow. During the procedure, subjects may be asked to exercise their legs on a machine to evaluate the effects of motion and exercise on the MRI exam. Large blood pressures cuffs may be placed on either or both thighs or calves to try to measure arterial flow to the legs. The cuffs are inflated to a pressure as high as at least 50 mmHg higher than thesubject s systolic blood pressure (up to 250 mmHg) for up to 10 minutes. Subjects may be asked to return for repeated scans.