Picture archiving and communication system (PACS) enables healthcare organizations to store, retrieve, distribute, and display medical images like X-ray, CT, MRI, ultrasound, and PET. It replaces physical film archives and lightbox viewing with centralized digital storage, giving radiologists and clinicians immediate access to imaging studies from anywhere across a care network.
PACS is used primarily by radiologists, referring clinicians, and imaging technologists working across hospitals, radiology centers, and specialty practices in fields such as cardiology, oncology, and orthopedics. The system enables users to access studies, retrieve prior imaging on demand, and share images across sites without any delay. Many platforms now incorporate AI to assist radiologists in analyzing images and flagging anomalies, making diagnostic workflows faster and more precise.
PACS typically integrates with radiology information systems software, electronic health records (EHR) software, and hospital information systems (HIS), giving clinicians a single point of access to both imaging data and patient records. Depending on the organization's needs, PACS can be deployed on-premises or via cloud-native architectures that support multi-site access and teleradiology. Unlike vendor-neutral archives (VNA) software, which is a long-term storage layer designed to retain images independently of any specific vendor, PACS is purpose-built for active clinical use and optimized for radiologist workflows, fast image retrieval, and diagnostic reading.
To qualify for inclusion in the Picture Archiving and Communication System (PACS) software category, a product must:
- Store and retrieve medical images in Digital Imaging and Communications in Medicine (DICOM) format from multiple imaging modalities like X-ray, CT, MRI, and ultrasound
- Provide a diagnostic image viewer with tools for 2D, 3D, or 4D image visualization, zooming, annotation, measurement, and prior study comparison
- Offer worklist management so radiologists can track, prioritize, and manage studies
- Support radiology reporting workflows, including report generation and distribution to referring clinicians
- Integrate with radiology information systems (RIS) and electronic health records (EHR)
- Support secure image sharing across departments and facilities, with role-based access controls and compliance with HIPAA
