Analog imaging, quality assurance, and quality control

Test on beam quality assessment (half-value layer measurement) is performed by the:

1. Mammographer

2. Medical physicist

3. Technologist

4. Radiologist

2

Beam quality assessment in a general test performed by the medical physicist.

In quality control, the standards refer to:

1. Action taken on a regular basis

2. Action taken to eliminate potential problems

3. Reference calibrations or measurements to check accuracy

4. Measurement variations allowed

3

Standards are reference objects or devices with known values used to check the accuracy of other measurement devices.

The person responsible for overseeing all the activities of the mammographer and the medical physicist is:

1. Quality control radiographer

2. State inspector

3. MQSA inspector

4. Radiologist

4

It is the radiologist's responsibility to oversee the activities of all personnel responsible for the quality assurance process.

QC duties of the mammographer include testing or monitoring of all of the following except:

1. Phantom image

2. Screen/film contact

3. Collimation assessment

4. Compression

3

The collimation assessment tests are performed by the medical physicist.

The ability of an x-ray tube to always produce the same intensity of radiation when the same set of technical factors is used to make an exposure is called:

1. Radiation output

2. Exposure time

3. Exposure reproducibility

4. kV accuracy

3

The exposure reproducibility is a check of the AEC. The system should deliver a consistent optical density regardless of compressed thickness and composition. The kV accuracy ensures that the kV selected is within +5% of the indicate kV. The radiation output is the selected KV and mA. The exposure time is the milliseconds of the actual exposure.

The MQSA standards were enacted:

1. Because mammography was over-regulated

2. To address the poor quality mammograms that were available

3. To enforce continuing education for radiologic technologist

4. To enforce continuing education for radiologist

2

MQSA was enacted to ensure quality patient care and imaging for patients needing amammogram. The MQSA involves regular checks of the training and continuing education of radi-ologist, technologist, and medical physicist.

The repeated image is:

1. Any image that is rejected

2. An image that is repeated and results in radiation dose to the patient

3. The magnified image requested by the radiologist

4. An image taken during quality control tests

2

Any projection or position that is repeated and result in an additional exposure to the patient is considered a repeated image.
Images that are used in quality control and do not cause additional patient dose are considered rejects, not repeats.

The person responsible for performing evaluations of and generating reports on the mammo-graphic unit is the:

1. Radiologic technologist

2. Mammographer

3. Medical physicist

4. Radiologist

3

It is the responsibility of the medical physicist to regularly check the mammography unit and component parts and generate reports as needed.

A test used to determine whether the time of exposure indicated by the control panel is the same as that delivered by the x-ray tube is performed by the:

1. Technologist

2. Physicist

3. Quality assurance technologist

4. Radiologist

2

Tests on the x-ray tube are generally performed by the medical physicist.

In analog imaging, AEC failure, resulting in an underexposed film, can be caused by

1. Processing deficiencies such as fluctuating developer temperature

2. Improper placement of the AEC detector

3. Decreased radiographic contrast

4. Processing a film when the processor temperature is too low

2

The placement of the AEC device is critical in analog imaging. If the device is placed under fatty breast tissue that is a mixture of fatty and dense, the dense areas will be under-expo