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A volunteer subject with no known significant health problems who participates in research to test a new drug, device or intervention. These volunteers are recruited to serve as controls for patient groups. Healthy volunteers receive the same test, procedure, or drug the patient group receives.

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During the early phases (phases 1 and 2), researchers assess safety, side effects, optimal dosages and risks/benefits. In the later phase (phase 3), researchers study whether the treatment works better than the current standard therapy. They also compare the safety of the new treatment with that of current treatments. Phase 3 trials include large numbers of people to make sure that the result is valid. There are also less common very early (phase 0) and later (phase 4) phases. Phase 0 trials are small trials that help researchers decide if a new agent should be tested in a phase 1 trial. Phase 4 trials look at long-term safety and effectiveness, after a new treatment has been approved and is on the market.

Search Results 21-30 of 77 for MRI

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  1. A Study to Assess Multiparametric MRI in Evaluating Cancer Stage and Helping Treatment Planning in Patients with Prostate Cancer

    Scottsdale/Phoenix, AZ, Jacksonville, FL, Rochester, MN

  2. A Study to Evaluate fMRI of Active DBS Stimulation in Epilepsy

    Rochester, MN

  3. A Study to Determine Serum and Urine Reference Ranges in Patients with Normal Renal Function Being Administered Gadobutrol for an Enhanced Magnetic Resonance Imaging (MRI)

    Rochester, MN

  4. A Study Comparing the Effective Use of a Compact MRI Scanner to Other Similar Scanners

    Rochester, MN

  5. A Study to Assess Gastric Functions

    Rochester, MN

  6. A Study to Explore MRI to Stage Bladder Cancer

    Jacksonville, FL

  7. Evaluation of Advanced Methods for Improved Imaging in Musculoskeletal MRI

    Rochester, MN

  8. Mayo Clinic Cardiac Implantable Electronic Device MRI Registry

    Rochester, MN

  9. A Study of Gadolinium in Serum and Urine Samples in Patients with No Prior History of MRI Exams

    Rochester, MN

  10. A Study to Compare Compact 3T, Conventional 3T, and 7T Scanners Using Task Based and Resting State fMRI

    Rochester, MN

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