What is the abbreviation for a computerized network that stores, retrieves, communicates, and displays digital images?

The abbreviation for a computerized network that stores, retrieves, communicates, and displays digital images is PACS, which stands for Picture Archiving and Communication System. PACS is essential in the field of medical imaging as it allows for the efficient management of images produced by various modalities such as CT, MRI, and X-rays. By using a PACS, healthcare providers can easily access patient images from different locations, ensuring that images are readily available for review, diagnosis, and treatment planning without the need for physical films.

While other options such as DICOM relate to image formatting and communication protocols within the medical imaging environment, they do not encompass the broad functionality of storage and retrieval that PACS offers. DICOM (Digital Imaging and Communications in Medicine) specifically deals with the standards for transmitting, storing, and sharing images but does not represent a network system itself. RIS (Radiology Information System) is focused on managing radiological data and not primarily on the storage and display of images like PACS. EMR (Electronic Medical Record) refers to a patient's medical history and records but is not specialized for handling images in the same way PACS is.

Thus, PACS is uniquely suited to the functions described in the question, making it the correct answer.