Radiography: Quality Assurance Flashcards
What is the term for the systematic collection and evaluation of data to ensure that high-quality images are consistently being produced using as little radiation as possible?
**Quality assurance **
What is the term for any necessary actions that control and verify the performance of imaging equipment?
Quality control
What are the main differences between quality assurance and quality control?
Quality control focuses on the imaging equipment and instrumentation; quality assurance focuses on the actions of staff and employees.
Any imaging facility that uses a digital image data management system must have _________________ for monitoring and evaluating the effective management, safety, and proper performance of acquisition, digitization, processing, compression, transmission, display, archiving, and retrieval functions of the system.
documented policies and procedures
What are the 3 main steps of performing quality control testing in radiography?
Acceptance testing, equipment maintenance and documentation, and routine monitoring
Which imaging facility or radiology department staff member is responsible for coordinating with the medical physicist regarding next steps for remedying any quality control testing failures?
**The quality control manager **
What daily quality assurance check should RTs perform on any digital radiography system prior to beginning any imaging study?
**Inspect the imaging system to verify it is operating safely **
Collimator tests and alignment must be accurate within __________% of the _____________________ .
2% of the source-to-image receptor distance (SID)
The quality assurance test for radiographic systems that measures the accuracy and consistency of milliamperage delivery and exposure time is known as?
**exposure linearity **
When quality control testing is performed to determine the penetrating ability of an X-ray tube (kVp), the result must be within what amount of the exposure settings?
10%
What are the 2 types of photometers that are used to measure the luminance response of monitors and luminance uniformity?
A near-range photometer and a telescopic photometer
What is the name of the quality control check that ensures the coincidence and alignment of the collimated light field within the region-of-interest?
X-ray beam/light field/Bucky tray alignment
Spatial resolution testing utilizes what unit of measure?
line pairs per mm (lp/mm)
All radiographic/fluoroscopic exposure ______________ should be routinely tested to make sure they prevent exposure when in the open position.
**interlocks **
Fluoroscopy equipment should be routinely tested to ensure that the cumulative timer produces audible signal to alert the equipment operator when the fluoroscopic imaging time has exceeded ______________
5 minutes
In digital radiography, an exposure recognition process, which is a combination of edge detection, noise pattern analysis, and histogram analysis may be used to identify _________________
values of interest
____________________ is an important aspect of digital image quality control parameters and is typically a result of poor patient positioning, patient motion, and technique errors.
**Reject analysis **
______________ is the heat that’s created in the X-ray tube, particularly at the anode.
Tube loading
What type of image is a result of incomplete elimination of a previous image from computed radiography imaging plate?
A ghost image
The relative strength of spatial frequencies in a uniform image is called the _______________ .
**noise power spectrum **
What test pattern is used in the quality control evaluation of imaging displays for geometric distortion?
The Society of Motion Picture and Television Engineers (SMPTE) pattern
_____________________ is a traditional method of measuring the modulation transfer function in digital radiography systems.
The slit assessment method
What is the goal of quality assurance testing lead-lined personal protective devices?
To assess the amount of protective material that’s left on the equipment
The accuracy of the exposure timer should be within what percentage of the indicated time for exposure times more than 10 ms?
5%
__________________ test is applicable to all available phosphor imaging plates and digital radiography detectors which should be erased/reset to eliminate any signals that could cause artifacts.
The erasure thoroughness test
