There are several types of imaging clinical trials:
Screening imaging clinical trials generally ask questions that will help researchers learn what type of imaging test will best detect disease early, possibly before symptoms of the disease are noticed.
Diagnostic imaging clinical trials address questions about what type of imaging test will best detect disease when it is suspected or will help monitor known disease or monitor a therapy to evaluate whether it is working.
Image-guided interventional clinical trials evaluate the role of therapies that are directed by imaging techniques.