View clinical trials related to MRI Scans.
Filter by:The purpose of this study is to investigate insula structural connectivity in temporal epilepsy patients. Insula being at the interface of frontal, parietal, occipital and temporal lobes, its structural organization reflects the brain function. We hypothetize that insular structural organization will be different according to the different subtypes of temporal epilepsy.
This study's main specific aims are; 1. To develop robust acquisition and reconstruction methods specifically for the study of microvascular cardiac remodeling with MRI which will include very innovative quantitative perfusion methods, as well as fibrosis quantification, longitudinal strain, and phase contrast imaging for flow. 2. Test the new methods for identifying the clinical task of characterizing HFpEF.
Bone conduction implants (BCI) are widely used in cases of conductive/ mixed hearing loss or single side deafness when surgical treatment or air hearing aids are not feasible. There are two types of BCI, abutments (which pass through the skin) and magnets (where a subcutaneous magnet is coupled to an external magnet). Pathologies (such as cholesteatoma) leading to the insertion of this hearing implant often require prolonged MRI follow-up. However, both the abutment and the magnet are responsible for imaging artifacts that limit its interpretation. Frequency and extent of these artifacts remain unclear in the literature. In our experience, the magnet, due to its size and composition, produces larger artifacts than the abutment. The main objective of our study is to compare MRI artifacts for each of these device types (abutment and magnet).
The overall goal of this research is to help develop a new magnetic resonance (MR) method, Quantitative Susceptibility Mapping (QSM), to improve the measurement of liver iron concentrations without the need for a liver biopsy. Measurement of liver iron is important to diagnose and treat patients who have too much iron in their bodies (iron overload). Liver iron measurements by current MRI methods (R2 and R2*) can be inaccurate because of the effects of fat, fibrosis and other abnormalities. QSM should not be affected by these factors and should be free of these errors. In this study, MRI measurements (QSM, R2 and R2*) of iron in patients before liver transplant will be compared with chemical analysis of iron in liver explants (livers removed from patients undergoing liver transplant). The liver explants would otherwise be discarded. Investigators expect that this study will show that the new MRI method, QSM, is superior to the current MRI methods, R2 and R2*.
Objective: The aims of this study will be to detect the fibrocartilage layer (FC) of the human temporomandibular joint (TMJ) using 3D SPGR (Spoiled GRASS sequence) (T1 WATS) sequence and to compare these results with those of conventional magnetic resonance imaging (DP, T2 MRI) sequences in patients with temporomandibular disorders (TMD).
This work seeks to develop, evaluate and use new MRI methods for non-invasive quantitative assessment of myocardial perfusion and perfusion reserve (MPR), and to compare with quantitative PET imaging.
The purpose of the registry is to accumulate pre-and post-scan device interrogation data for the purpose of determining the risk of MRI for patients with implantable devices.