Radiography: Quality Assurance

Question 1

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?

Answer 1

**Quality assurance **

Question 2

What is the term for any necessary actions that control and verify the performance of imaging equipment?

Answer 2

Quality control

Question 3

What are the main differences between quality assurance and quality control?

Answer 3

Quality control focuses on the imaging equipment and instrumentation; quality assurance focuses on the actions of staff and employees.

Question 4

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.

Answer 4

documented policies and procedures

Question 5

What are the 3 main steps of performing quality control testing in radiography?

Answer 5

Acceptance testing, equipment maintenance and documentation, and routine monitoring

Question 6

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?

Answer 6

**The quality control manager **

Question 7

What daily quality assurance check should RTs perform on any digital radiography system prior to beginning any imaging study?

Answer 7

**Inspect the imaging system to verify it is operating safely **

Question 8

Collimator tests and alignment must be accurate within __________% of the _____________________ .

Answer 8

2% of the source-to-image receptor distance (SID)

Question 9

The quality assurance test for radiographic systems that measures the accuracy and consistency of milliamperage delivery and exposure time is known as?

Answer 9

**exposure linearity **

Question 10

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?

Answer 10

10%

Question 11

What are the 2 types of photometers that are used to measure the luminance response of monitors and luminance uniformity?

Answer 11

A near-range photometer and a telescopic photometer

Question 12

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?

Answer 12

X-ray beam/light field/Bucky tray alignment

Question 13

Spatial resolution testing utilizes what unit of measure?

Answer 13

line pairs per mm (lp/mm)

Question 14

All radiographic/fluoroscopic exposure ______________ should be routinely tested to make sure they prevent exposure when in the open position.

Answer 14

**interlocks **

Question 15

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 ______________

Answer 15

5 minutes

Question 16

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 _________________

Answer 16

values of interest

Question 17

____________________ is an important aspect of digital image quality control parameters and is typically a result of poor patient positioning, patient motion, and technique errors.

Answer 17

**Reject analysis **

Question 18

______________ is the heat that’s created in the X-ray tube, particularly at the anode.

Answer 18

Tube loading

Question 19

What type of image is a result of incomplete elimination of a previous image from computed radiography imaging plate?

Answer 19

A ghost image

Question 20

The relative strength of spatial frequencies in a uniform image is called the _______________ .

Answer 20

**noise power spectrum **

Question 21

What test pattern is used in the quality control evaluation of imaging displays for geometric distortion?

Answer 21

The Society of Motion Picture and Television Engineers (SMPTE) pattern

Question 22

_____________________ is a traditional method of measuring the modulation transfer function in digital radiography systems.

Answer 22

The slit assessment method

Question 23

What is the goal of quality assurance testing lead-lined personal protective devices?

Answer 23

To assess the amount of protective material that’s left on the equipment

Question 24

The accuracy of the exposure timer should be within what percentage of the indicated time for exposure times more than 10 ms?

Answer 24

5%

Question 25

__________________ 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.

Answer 25

The erasure thoroughness test