Patient Management

DICOM patient management, study management, and visit management were defined as a mirror of the HL7 protocol. They have been sparsely implemented, and parts of them are being replaced with other DICOM services such as the Modality Worklist and the Modality Performed Procedure Step.

Hospital Information Systems (HIS) typically interconnect with a variety of other clinical systems, such as laboratory systems and Radiology Information Systems (RIS), using the HL7 interface.

The HL7 standard is a transaction based protocol. That means a message is generated as a result of a certain real-life occurrence or triggered event, such as the admission of a patient, the changing/transferring of a patient from one location to another or a patient discharge. Generally these occurrences generate unsolicited events which are sent to various points on the point-to-point connection or network.

The DICOM patient management services are not widely implemented because the transaction-based protocol does not fit the architecture and workflow of the modalities very well. A major improvement to the patient and study management services was the Modality Worklist Service, which implemented the Client Server protocol of DICOM.

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