Diagnostic trials can be broadly classified into several categories: - Imaging Trials: These trials evaluate new imaging technologies like advanced MRI, PET scans, and CT scans to detect cancer more accurately. - Biomarker Trials: These investigate the effectiveness of biomarkers, which are substances that may indicate the presence of cancer in the body. - Genomic Trials: These focus on identifying genetic mutations and alterations associated with cancer, which can help in diagnosing specific cancer types. - Non-Invasive Procedures: Trials in this category aim to develop less invasive diagnostic methods, such as blood tests or urine tests, to detect cancer.