A PACS (Picture Archiving and Communication System) in radiology is a medical imaging technology used to store, retrieve, manage, and share digital images such as X-rays, CT scans, and MRIs. It eliminates the need for physical film by providing secure electronic access to images and reports. PACS improves workflow efficiency, enables faster diagnosis, and allows remote access for healthcare professionals. It integrates with hospital information systems, ensuring better patient data management and streamlined communication across departments.