CPAS System Integration & Interoperability 3

Question 1

An HL7 ORU message in a PACS/RIS integration workflow is used to:

Accepted Answer

Transmit radiology results and report text back to the ordering system

Answer

HL7 ORU (Observation Result Unsolicited) messages carry completed radiology reports from the RIS back to the ordering EHR or HIS system.

Question 2

In IHE integration, the Patient Identifier Cross-Referencing (PIX) profile is used to:

Accepted Answer

Match and link patient identifiers across multiple systems using different IDs

Answer

PIX enables a PIX Manager to cross-reference patient IDs from different domains so that a single patient is correctly identified across disparate systems.

Question 3

Which DICOM service allows a PACS to push images to a remote workstation or archive without the destination explicitly requesting them?

Accepted Answer

C-STORE

Answer

C-STORE is the DICOM service used to push (send) image objects from a Storage SCU to a remote Storage SCP without a prior retrieval request.

Question 4

A PACS administrator must ensure that a DICOM association can be established between a new CT scanner and the PACS archive. Which configuration step is ESSENTIAL?

Accepted Answer

Adding the scanner's AE Title, IP address, and port to the PACS allowed-device list

Answer

PACS systems maintain an authorized AE list; the CT scanner's AE Title, IP, and port must be registered on the PACS to allow association negotiation.

Question 5

The DICOMweb STOW-RS service is used to:

Accepted Answer

Store DICOM instances to a server using HTTP POST

Answer

STOW-RS (Store Over the Web via RESTful Services) allows DICOM objects to be stored on a server using an HTTP POST request, enabling web-native PACS integrations.

CPAS - Certified PACS Associate Practice Test

CPAS - Certified PACS Associate Practice Test

CPAS System Integration & Interoperability 3