Which statement best describes the role of DICOM in radiographic imaging?

• A. DICOM governs privacy policies for hospital networks.
• B. DICOM is used for film development.
• C. DICOM stores the image as raw pixel data only.
• D. DICOM defines data structure and exchange of imaging data; privacy and secure transfer are achieved with additional network security protocols.

Answer: (D)

DICOM provides a universal format and communication framework for radiology imaging. It defines how an image and all its accompanying information are packaged together—the pixel data plus a header with patient demographics, study and series details, modality, acquisition parameters, and other metadata. It also specifies how devices exchange this information through standardized services, enabling seamless transfer and retrieval between modalities, workstations, and PACS.

Because the standard focuses on structure and interchange, privacy and secure transfer aren’t built into DICOM alone. Protecting patient privacy and ensuring secure transmission are achieved by using additional security measures, such as transport encryption (TLS), secure networks (VPNs), access controls, and data de-identification as needed.

Other options don’t fit: privacy policies for hospital networks aren’t dictated by DICOM itself; film development is a traditional analog process unrelated to the digital standard; and DICOM is not limited to raw pixel data—the header and metadata are essential components, and the encoding of pixel data may vary (including compressed formats).