Week 9: Quality Management Flashcards
The TG 18 CX and TG 18 QC can be used to evaluate a display monitor’s
A. noise
B. spatial resolution
C. luminance
D. luminance nonuniformity
B. spatial resolution
Exposure reproducibility states that x-ray generators should be able to repeat exposures accurately when measuring mR/mAs and should be maintained within
A. +/- 2%
B. +/- 5%
C. +/- 10%
D. +/- 15%
B. +/- 5%
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
A. +/- 15% of each other
B. +/- 5% of each other
C. +/- 20% of each other
D. +/- 10% of each other
D. +/- 10% of each other
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
A. grayscale display function (GSDF)
B. society of motion picture and television engineers (SMPTE)
C. health insurance portability and accountability act (HIPAA)
D. safe medical devices act (SMDA)
A. grayscale display function (GSDF)
If an image appears from a previous exam after the IR has been erased, this is an example of a failure of
A. erasure thoroughness
B. exposure reproducibility
C. central ray alignment
D. kVp accuracy
A. erasure thoroughness
The Amercian Association of Physicicsts in Medicine (AAPM) developed the AAPM TG 18 test patterns for the radiologic technologist’s assesment of the
A. digital display device
B. central ray alignment
C. light field to radiation field alignment
D. DR detector calibration
A. digital display device
When measured with a computerized dosimeter, exposure time settings should be maintained within
A. +/- 5 percent of the label
B. +/- 10 percent of the label
C. +/- 1 percent of the label
D. +/- 2 percent of the label
A. +/- 5 percent of the label
When shielding accessories such as aprons and thyroid shields demonstrate cracks, tears, or holes under fluoroscopy, these accessories should be
A. Photographed and reused
B. Hung up immediately so that they can be reused
C. Replaced
D. Passed over to the operating department
C. Replaced
To evaluate a digital display device’s reflection and to assess ambient light conditions, what tool should be used?
A. SMPTE pattern
B. photometer
C. GSDF
D. illuminance meter or lux meter
D. illuminance meter or lux meter
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
A. detective quantum efficiency (DQE)
B. half-value layer
C. ion chamber sensitivity
D. source to skin distance limits
A. detective quantum efficiency (DQE)
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
A. luminance meter
B. photometer
C. slit camera
D. computerized dosimeter
D. computerized dosimeter
A coherent system designed to monitor equipment performance through a variety of quality assurance and quality control standards or benchmarks is defined as
A. quality management
B. customer service
C. the radiographer’s code of ethics
D. a mission statement
A. quality management
Data indicate that the radiographer’s rejected image rate (repeat rate) should be
A. between 10 and 20 percent
B. between 3 and 10 percent
C. less than 2 percent
D. between 10 and 15 percent
B. between 3 and 10 percent
A tool used for the measurement of focal spot size include the
A. Pinhole camera
B. Star pattern
C. Slit camera
D. All of these
D. All of these
The alignment of the bucky center mark and the central ray should be within _______ of the SID
A. 1%
B. 3%
C. 2%
D. 4%
A. 1%
