Instrumentation and Quality Assurance
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| In mammography, selecting extremely low kVp values | show 🗑
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| What target-filtration combination provides the best penetration for dense or thick breast? | show 🗑
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| show | Regular glass would harden the emerging beam.
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| The intensity of the x-ray beam from the cathode side of the tube is generally higher because | show 🗑
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| The design of the lip of the compression paddle (both height and angle along the chest wall) affects all of the following | show 🗑
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| The primary goal of compression is to | show 🗑
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| AEC failure, resulting in an underexposed radiograph, can be caused by | show 🗑
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| Most AEC circuitry in modern mammographic imaging has at least three detectors. Three or more detectors are recommended because | show 🗑
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| show | grids used in general radiography have higher ratios
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| As the size of the x-ray field decreases, to maintain a constant image density the exposure will | show 🗑
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| show | avoid projecting the chest wall edge of the paddle on the mammogram.
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| Which of the following affects focal spot size? | show 🗑
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| In mammography, the commonly used focal spot size for routine work is | show 🗑
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| show | generally have a single intensifying screen.
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| show | increased processing artifact and increased film fog
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| show | a detector and electronic system
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| show | In digital technology, the final image can be manipulated
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| show | The system has a lower spatial resolution than the single emulsion systems.
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| show | the toe of the graph
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| The characteristic curve, obtained by plotting density values from a sensitometer, can be used to assess all of the following exvept: | show 🗑
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| The characteristic curve of two films is plotted.The curve of film A is positioned to the left of the curve of film B. | show 🗑
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| show | visual checklist
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| show | elapsed time between film loading and exposure
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| show | screen cleanliness
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| The criteria to pass the ACR Mammography Accreditation on conventional phantom imaging require a minimum of ___ masses. | show 🗑
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| show | closest to but not less than 1.20
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| show | +0.03 of the established levels
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| The screen-cleaning test should be carried out whenever | show 🗑
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| show | check the developer temperature
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| The phantom image background optical density should never be | show 🗑
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| In the darkroom fog test, the optical density difference between fogged and unfogged areas of the film should not exceed | show 🗑
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| show | using the same film emulsion batch
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| In the test for screen contact there were multiple points of small areas (<1 cm in diameter) of poor contact. The corrective action is to | show 🗑
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| show | protect the cassette holder
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| For the repeat analysis to be meaningful, a patient volume of at least ___ patients is needed. | show 🗑
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| show | using the sensitometer to measure the densities on the strip
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| show | repeating the test with the safelights off
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| show | semiannually
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| show | -determine the film speed
-check the film contrast
-check the stability of the processor
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| If, after examining a phantom image, the number of visualized fibers of masses has changed significantly, the next step is to | show 🗑
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| Repeated films are | show 🗑
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| show | 3 months
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| show | Fluorescent tubes decrease in brightness with age
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| show | 4.0-4.5
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| show | -the FDA
-an SAC state
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| An MQSA certificate is issued when a mammography facility has been accredited. This certification is valued for | show 🗑
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| show | correct or replace the item
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| Digital images can be viewed on a computer monitor or printed using | show 🗑
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| show | the image that is sent for interpretation
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| The grid ratio can vary in modern mammography units. A common grid ratio used is | show 🗑
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