CPAS System Integration & Interoperability

Question 1

Which interface standard is most commonly used to communicate patient demographic and order information between a Hospital Information System (HIS) and a PACS?

Accepted Answer

HL7

Answer

HL7 (Health Level 7) messaging is the primary standard used to exchange administrative and clinical data such as ADT, ORM, and ORU messages between HIS/RIS and PACS.

Question 2

In a PACS integration workflow, an HL7 ORM message is used to:

Accepted Answer

Send radiology orders from RIS to the modality worklist

Answer

The HL7 ORM (Order Message) is sent from the RIS to populate the Modality Worklist (MWL), allowing technologists to select patient exams directly on the imaging device.

Question 3

The IHE Scheduled Workflow (SWF) integration profile defines the interaction between which of the following systems?

Accepted Answer

HIS, RIS, Modality, and PACS

Answer

IHE SWF coordinates the end-to-end radiology workflow among HIS, RIS, imaging modalities, and PACS, standardizing how orders, images, and results flow.

Question 4

A DICOM Modality Worklist (MWL) server reduces errors by:

Accepted Answer

Allowing technologists to retrieve pre-populated patient demographics at the scanner

Answer

MWL pushes scheduled exam data to modalities so technologists do not need to manually type patient information, reducing transcription errors and misidentification.

Question 5

Which IHE transaction is responsible for sending a completed study notification back to the RIS after images are stored in PACS?

Accepted Answer

RAD-13 (Modality Images Stored)

Answer

RAD-13 (Modality Images Stored) notifies the image manager/PACS that a modality has completed storing images, triggering downstream RIS status updates.

CPAS - Certified PACS Associate Practice Test

CPAS - Certified PACS Associate Practice Test

CPAS System Integration & Interoperability