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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 1-10 of 132 for Radiology

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  • Study status: Open/Status Unknown
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  1. A Study to Analyze Biopsy of Vascular Malformations

    Rochester, MN

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

    Jacksonville, FL

  3. A Study to Evaluate 177Lu-PSMA-R2 in Patients with PSMA Positive Progressive, Metastatic, Castration Resistant Prostate Cancer

    Rochester, MN

  4. DSC-MRI in Measuring Relative Cerebral Blood Volume for Early Response to Bevacizumab in Patients With Recurrent Glioblastoma

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

  5. Evaluation of NSR 7T Magnetic Resonance Imaging Hardware and Software

    Rochester, MN

  6. A Study of the Mayo Clinic College of Medicine Ultrasound System

    Rochester, MN

  7. A Study to Develop and Validate Hybrid Molecular Imaging to Transform the Care of Hepatocellular Carcinoma Patients

    Rochester, MN

  8. A Study to Evaluate the Safety and Effectiveness of NX9 for CT Imaging in Patients with Cancer or GI Disease

    Rochester, MN

  9. A Long Term Study of Molecular and Structural Imaging in Atypical Alzheimer's Disease

    Rochester, MN

  10. MR-Guided Cryoablation of Prostate Bed Recurrences

    Rochester, MN

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