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Find 3,190 clinical trials for rheumatoid arthritis near Los Angeles, California. Connect with research centers in your area.
Showing 561-580 of 3,190 trials
NCT07339085
This clinical trial studies whether advanced magnetic resonance imaging (MRI) techniques, including diffusion-relaxation correlation spectrum imaging (DR-CSI) and sodium imaging, can be used to identify the difference between brain tumors that come back after a period of improvement (recurrent) and treatment-related tissue damage (radiation necrosis \[RN\]). Radiation therapy is often used in the treatment of brain tumors. Radiation treatment response can be difficult to assess and is usually done using conventional MRI, which uses radio waves and a powerful magnet linked to a computer to create detailed pictures of areas inside the body. Current imaging techniques have a limited ability to identify the difference between recurrent brain tumor and RN due to their similar appearance on conventional MRI and overlapping clinical presentation. This makes it hard for doctors to plan the best way to treat these tumors. DR-CSI is a new MRI technique with the potential to detect microscopic tissue components with different characteristics. Sodium imaging is an MRI technique that estimates the total sodium concentration in the obtained images. It may be able to identify the small structures within the tissue of brain tumors. Advanced MRI techniques like DR-CSI and sodium imaging may be effective in identifying the difference between recurrent brain tumors and RN.
NCT06257706
Transmural healing (TMH) is recognized as a potentially important measure of Crohn's disease (CD) activity but not a formal target. Observational studies suggest that TMH may be associated with better long-term outcomes. The study will evaluate TMH using noninvasive intestinal ultrasound (IUS), a patient-friendly technique that can be performed routinely in clinical practice. The aim of the study is to determine if treating to a target of corticosteroid-free (CS-free) IUS outcomes + clinical symptoms + biomarkers is superior to a target of clinical symptoms + biomarkers alone in achieving CS-free endoscopic remission measured by the Simple Endoscopic Score for Crohn's Disease (SES-CD). Qualified participants will be randomly assigned in a 1:1 ratio to one of 2 different target treatment groups. Group 1: Participants will be treated over 48 weeks to achieve a target of corticosteroid-free IUS-based outcomes + clinical remission + biomarker remission. At Week 22 and 30, the IUS-based component of the target will be IUS response and at Week 38, the final treatment target will be TMH. Group 2: Participants will be treated over 48 weeks to achieve a target of corticosteroid-free clinical remission + biomarker remission.