Dental imaging and diagnostics is where clinical findings become measurable. This section of the Rebrief Dental Glossary defines the imaging modalities, diagnostic tests, and assessment frameworks that drive treatment decisions. Imaging entries cover the full spectrum: bitewing, periapical, panoramic, and cephalometric x-rays; CBCT (cone-beam computed tomography) for 3D volumes; intraoral scanning for digital impressions; and the DICOM standards that move images between systems. Diagnostic entries cover the clinical examination itself (periodontal exam, cold sensitivity test, percussion testing, tooth vitality assessment), risk-assessment tools (caries risk evaluation, bite force analysis), and the AI-assisted diagnostic tools increasingly built into modern practices. We also cover the radiation-safety vocabulary (ALARA, scatter radiation) that every operator working with x-rays needs to know. Each entry explains what the test or modality measures, when it’s indicated, what findings it produces, and how those findings feed into the diagnoses defined in the conditions section and the treatments defined in the procedures section. Whether you’re studying for boards, training a new assistant on imaging protocols, or explaining a finding to a patient, this is a fast reference for the diagnostic terminology in modern dental practice.