Unit 7 - QC and Artifacts in CT Flashcards
What is the purpose of QC testing in CT?
To ensure scanner produces high quality images, at lowest possible dose to both patients and staff.
What are the 3 types of QC testing in CT?
- Acceptance Testing
- Routine Performance Testing
- Error Correction Testing
Who preforms Acceptance Testing in CT?
Performed by independent 3rd party
What is the purpose of Acceptance Testing in CT?
Establishing that scanner meets the vendor’s specifications
How often is Routine Performance Testing preformed?
Performed on a peroidic basis
What is the purpose of Routine Performance Testing?
Monitors the technical components of the scanner (Focuses on image quality parameters and dose) and examines whether the scanner meets acceptance limits
What is the purpose of Error Correction Testing?
Test to evaluate correction of equipment that has malfunctioned.
What 3 indications/values should be located on the gantry?
- Table Height Indicator
- Table Position Indicator
- Angulation Indicator Functioning
Read over the following requirements of the visual checklist in CT:
- Laser localization functioning (laser lights in gantry)
- High voltage cables (not frayed)
- Acceptable smoothness of table motion
- X-ray ON indicator
- Exposure Switch functioning
- Display WW/WL (on monitor)
- Control Panel lights working
- Warning labels present: Intercom system functioning (used to communicate instructions to patient from the control room)
- CT machine service records present
What are the names of the 2 types of Phantoms used for QC Testing in CT?
- ACR (American College of Radiology) CT accreditation phantom aka Gammex 464 phantom
- Catphan 700 phantom
Vendor specific