View clinical trials related to MRI.
Filter by:To date except for the larger striato-pallidal complex, there are no reliable imaging markers of small deep nuclei. Major improvement of the spatial resolution resulting from the use of ultra-high field MRI systems offers new perspectives of imaging of these deep structures. We will use the new contrast mechanisms available in data acquired with ultra-high field MR systems (7T) as well as the most recent high angular diffusion imaging techniques in order to characterize the cytoarchitectonics of the deep brain structures and brainstem lesions in parkinsonian syndromes (with special interest in substantia nigra (SN) pathology and nigro-striatal fiber pathways; subthalamic nucleus (STN), red nucleus (RN), oculomotor structures (involved in PSP); pedonculo-pontine nucleus (involved in gait and posture control disorders) and the locus sub-coeruleus area (implicated in sleep disorders) The optimized MR sequences at 7T will be adapted and validated at 3T (on a more clinically oriented MRI approach). The clinical goal of the project (via the characterization of deep brain structures) is the detection of new neuroimaging markers of neuronal lesions in PD. These biomarkers will be used to create a diagnostic tool at early stage of the disease that could be correlated to clinical signs such as gait disorders and help to identify predictive factors. In addition, this could contribute to establish an adequate therapeutic strategy (as for example with deep brain stimulation).
The goal of this research is to find out possible susceptible gene(s) in schizophrenic patients with family history and 5-year period functional changes of brain among the members of family, in order to further analysis factors and their interactions.
Comparison of two regimens (Sevorane/LMA ctr. Propofol/Remifentanil) for children undergoing MRI in general anesthesia.
Cytomegalovirus (CMV) is the largest member of the virus family Herpesviridae that infects almost all humans at some point in their lives (Ross, 2004). Congenital CMV infection is most likely to occur when the mother experiences a primary infection during pregnancy, and it is much less common in cases of reactivation of the disease or infection by a different CMV strain (Boppana 1999, Endres 2001). The prevalence of congenital CMV infection varies between 0.15-2.2% (Ross 2004, Ross 2006, Malm 2007). While most infants born with congenital CMV infection are asymptomatic, 10 to 15% show clinical findings at birth (Ross 2004). It is generally agreed that congenital CMV infection, whether it is symptomatic or not, is a major risk factor for perceptual deficits. However, its influence on children's future neuropsychological functioning is less well established. Symptomatic congenital CMV infection is a major risk factor for poor developmental outcome (Williamson 1982, Kylat 2006, Dollard 2007), but the available data regarding neuropsychological outcome for asymptomatic children is extremely diverse (Conboy 1986, Ivarson 1997, Kashdan 1998, Temple 2000, Zhang 2007). We evaluated the neuropsychological outcome of children with congenital cytomegalovirus (CMV) infection and normal consecutive fetal neurosonographic examinations and determined whether Magnetic Resonance Imaging (MRI) provided additional information in these cases.
The purpose of this study is to determine the benefits of Magnetic Resonance Imaging (MRI) combined with Magnetic Resonance Spectroscopic Imaging (MRSI), on an instrument called a 3.0 Tesla (T) MR scanner.
Investigation of how the patients experience whole body MRA. After the WB-MRA the patients will fill in a questionnaire, that contains questions about the WB-MRA procedure and how the patient felt during the examination. We expect that the patients will report a high degree of satisfaction with the WB-MRA procedure, with little discomfort.
To investigate the diagnostic performance of whole body magnetic resonance angiography (WB-MRA) using two different magnetic resonance scanners at a field strength of 1.5 and 3T. The hypothesis is that use of the 3T system gives superior signals from the investigated arteries, when compared with 1.5T.
Iron overload is well study in Thalassemia patients and it's not only related to blood transfusions, since intestinal iron absorption is also increased in those patients. Sickle cell patients didn't develope significant clinical symptoms and signs of iron overload in spite frequent transfusions. The purpouse of this study is to assess the iron overload in Sickle cell anemia and Sickle cell Thalassemia patients using clinical parameters and cardiac T2*MRI in order to determine the cardiac and liver iron.