9. Quality Management

Question 1

A coherent system designed to monitor equipment performance through a variety of quality assurance and quality control standards or benchmarks is defined as:

a mission statement
quality management
the radiographer’s code of ethics
customer service

Answer 1

quality management

Question 2

A tool used for the measurement of focal spot size include the:

Pinhole camera
Star pattern
Slit camera
All of these

Answer 2

All of these

Question 2

If an image appears from a previous exam after the IR has been erased, this is an example of a failure of:

kVp accuracy
erasure thoroughness
exposure reproducibility
central ray alignment

Answer 2

erasure thoroughness

Question 3

When shielding accessories such as aprons and thyroid shields demonstrate cracks, tears, or holes under fluoroscopy, these accessories should be

Hung up immediately so that they can be reused
Replaced
Passed over to the operating department
Photographed and reused

Answer 3

Replaced

Question 4

Misalignment between the collimator light field size and the radiation field must not exceed _______ of the SID per exposure.

5%
4%
2%
3%

Answer 4

2%

Question 5

The alignment of the bucky center mark and the central ray should be within _______ of the SID.

4%
3%
2%
1%

Answer 5

1%

Question 6

From a single exposure, this device is essential in providing readouts and printouts of many quality control parameters, such as milliamperage linearity and exposure reproducibility.

computerized dosimeter
slit camera
luminance meter
photometer

Answer 6

computerized dosimeter

Question 7

The TG 18 CX and TG 18 QC can be used to evaluate a display monitor’s:

luminance nonuniformity
noise
luminance
spatial resolution

Answer 7

spatial resolution

Question 8

When measured with a computerized dosimeter, exposure time settings should be maintained within:

+/- 5 percent of the label
+/- 10 percent of the label
+/- 1 percent of the label
+/- 2 percent of the label

Answer 8

+/- 5 percent of the label

Question 9

Measuring a general purpose radiographic unit’s filtration requires the measurement of the x-ray beam’s:

1/5 value layer
1/10 value layer
1/8 value layer
1/2 value layer

Answer 9

1/2 value layer

Question 9

Comparing measurements in mR/mAs for the same mAs at different mA and time settings is done to evaluate the linearity of the mA stations. Milliamperage stations should be mainted within:

+/- 5% of each other
+/- 20% of each other
+/- 15% of each other
+/- 10% of each other

Answer 9

+/- 10% of each other

Question 10

Exposure reproducibility states that x-ray generators should be able to repeat exposures accurately when measuring mR/mAs and should be maintained within:

+/- 5%
+/- 10%
+/- 15%
+/- 2%

Answer 10

+/- 5%

Question 11

A photometer is used to measure:

Exposure reproducibility
KVp accuracy
Exposure linearity
Digital monitor luminance

Answer 11

Digital monitor luminance

Question 12

When measuring kilovoltage accuracy in a diagnostic radiographic system with the computerized dosimeter, kilovoltage accuracy drifts over time as the tube ages. kVp settings should not drift beyond:

+/- 10 kVp of the labeled setting
+/- 5 kVp of the labeled setting
+/- 2 kVp of the labeled setting
+/- 1 kVp of the labeled setting

Answer 12

+/- 5 kVp of the labeled setting

Question 12

The Amercian Association of Physicicsts in Medicine (AAPM) developed the AAPM TG 18 test patterns for the radiologic technologist’s assesment of the:

central ray alignment
digital display device
light field to radiation field alignment
DR detector calibration

Answer 12

digital display device

Question 13

The standard which calls for medical images which were transferred according to DICOM standards to be displayed on any DICOM compatible digital display device with a consistent grayscale appearance is:

society of motion picture and television engineers (SMPTE)
grayscale display function (GSDF)
health insurance portability and accountability act (HIPAA)
safe medical devices act (SMDA)

Answer 13

grayscale display function (GSDF)

Question 14

Computed radiography (CR) image receptors require visual inspection for cracks and surface markings completed semiannually, but CR erasure should be performed:

daily
once a week
once a month
annually

Answer 14

daily

Question 15

Data indicate that the radiographer’s rejected image rate (repeat rate) should be:

between 10 and 15 percent
between 3 and 10 percent
less than 2 percent
between 10 and 20 percent

Answer 15

between 3 and 10 percent

Question 16

To evaluate a digital display device’s reflection and to assess ambient light conditions, what tool should be used?

SMPTE pattern
illuminance meter or lux meter
photometer
GSDF

Answer 16

illuminance meter or lux meter

Question 17

With regards to digital radiography (DR) detectors, most vendors offer a quality control test tool to periodically evaluate the detector system, with the primary parameter to be tested being:

source to skin distance limits
half-value layer
detective quantum efficiency (DQE)
ion chamber sensitivity

Answer 17

detective quantum efficiency (DQE)