View clinical trials related to Magnetic Resonance Imaging.
Filter by:Background: - People with motor neuron disorders have changes in the parts of the brain that control movement. Some tests that are currently used to study these changes are magnetic resonance imaging (MRI) and transcranial magnetic stimulation (TMS). We don t know if MRI scans and TMS give the same results if done at different times in the same person. Researchers want to see if these tests produce different results if given to healthy adults on two separate occasions. Objectives: - To test the reliability of different tests of the brain used to study motor neuron disorders. Eligibility: - <TAB>Healthy individuals at least 35 years of age who have no history of neurological disorders and take no medications. - <TAB>Pregnant women may not participate. Design: - Participants will be screened with a medical history and physical exam. - Participants will have two testing visits 1 to 6 months apart. - The first visit will have three parts. The first part is a neurological exam to test strength, sensation, reflexes, and coordination of movement. The second part will be TMS tests. The third part will involve an MRI scan to study the parts of the brain that control movement. - At the second visit, participants will have MRI scanning only.
The object of this study is to compare four different dosages of Gadavist 1.0 in cardiac Magnetic Resonance Tomography (MRT) imaging with the imaging results of a cardiac SPECT examination in terms of diagnostic quality. For this purpose Gadavist dosages of 0.01 mmol/kg, 0.025 mmol/kg, 0.05 mmol/kg or 0.1mmol/kg body weight are administered. A study participant receives the respective dose twice i.e. at rest and at stress using Adenosine (which puts circulation into a state of stress similar to that of physical exercise). The time between both injections is 10-15 min. The total imaging time is about 45 min.
Many disorders where attentional problems are a hallmark, such as Alzheimer's disease and schizophrenia, display abnormal regulation of the so-called default network of resting brain function that maintains internally directed thought when the mind is free to wander. There is indication that nicotine may improve attention by aiding the deactivation of the default network, and this mechanism may be of therapeutic benefit for the above disease states. The current project aims at providing a proof of concept by demonstrating that nicotinic drugs modulate default network function. The nicotinic agonist nicotine is hypothesized to improve attention by facilitating the down-regulation of default network activity, and the nicotinic antagonist mecamylamine is hypothesized to impair attention by impeding the down-regulation of default network activity during attentional task performance.
The purpose of the Advisa MRI System clinical study is to confirm safety and effectiveness in the clinical MRI (Magnetic Resonance Imaging) environment when subjects receive MRI scans up to 2W/kg Specific Absorption Rate (SAR) without positioning restrictions (MRI scans may occur anywhere on the body including the chest).
Prospective, non-interventional, multi-center study. The observation period for each subject covers the treatment period with Gadovist®. For each patient, the treating physician or nurse documents demographics, medical data, safety parameters and treatment signs and symptoms at the visit. Patients with severe renal impairment will be followed-up after 3 month by phone call from the investigator if in line with routine practice. Data audit/monitoring by source data verification will be done in a subset of sites and patients
The purpose of the study is to look at the safety (what are the side effects) and efficacy (how well does it work) of gadobutrol when used for taking MR images of the body/extremities regions. The results of the MRI with gadobutrol injection will be compared to the results of MR images taken without contrast and with the results of the MR images taken with Magnevist.
Background and aims: Magnetic resonance imaging (MRI) has proved beneficial for presenting anatomy for regional anaesthesia and to demonstrate spread of local anaesthetic. A new axillary plexus block with a triple injection (1), combining a short axillary catheter method with a transarterial axillary block, is now being evaluated with a 3 Tesla MRI. In this study, the investigators are investigating MR visualisation of three different block techniques and compare the clinical efficacy of the techniques, with the MR findings. Patients & Methods: After obtaining approval of the protocol from the regional ethical committee, 3 x 15 adult patients, scheduled for hand surgery, were included in a randomised, blinded prospective study.
The purpose of this study is to determine pharmacokinetics, safety and efficacy of Magnevist in children 2 months to < 2 years of age
Patients will be recruited from those who will undergo contrast enhanced MRI. Safety and tolerability will be assessed.
The goal of this study is to determine if there is a significant difference in the quality of care between the investigators' two standard anesthesia techniques for children undergoing a MRI of the body and/or extremity MRI. Quality of care will be measured by time spent in the MRI room as well as parental satisfaction, frequency of interruptions of the MRI scan, incidence-severity of respiratory complications, post anesthesia agitation, and time spent in the induction room, MRI room, and Post-Anesthesia Care Unit (PACU).