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Fauber Ch 1-5

Chapter Review

QuestionAnswer
Determining the scale of contrast is one role of kVp. T or F True
Subject contrast will vary with physical condition. T or F True
Film/screen combination has no effect on contrast. Tor F False
All other factors remaining constant, an increase in kVp will have what effect on density? increase
The longer the OID, the _______ the loss of sharpness greater
The ________ the screen, the greater the sharpness. slower
What 3 things can be used to minimize size distortion very small focal spot, increase SID, decrease OID
What does filtration absorb low energy photons
What term defines the "range of acceptable SID's that can be used with a focus grid"? grid focal range
What effect does increasing filtration have on radiographic contrast decreases contrast
In what year were x-rays discovered?
In what year were some of the biologically damaging effects of x-rays discovered?
X-rays were discovered in experiments dealing with electricity and ___________.
X-rays were discovered when they caused a barium platinocyanide–coated plate to _________.
X-radiation is part of which spectrum?
X-rays have a dual nature, which means that they behave like both ________________.
The wavelength and frequency of x-rays are __________________ related.
X-rays have __________________ electrical charge.
X-rays have ____________.
The x-ray beam used in diagnostic radiography can be described as being ___________.
Which x-ray tube component serves as a source of electrons for x-ray production?
Electrons interact with the ______ to produce x-rays and heat.
The cloud of electrons that forms before x-ray production is referred to as ______.
The burning or boiling off of electrons at the cathode is referred to as ______.
Which primary exposure factor influences both the quantity and the quality of x-ray photons?
The unit used to express tube current is ______.
What percentage of the kinetic energy is converted to heat when moving electrons strike the anode target?
The intensity of the x-ray beam is greater on the ______.
According to the line focus principle, as the target angle decreases, the ________.
___________ extends x-ray tube life.
Which type of target interaction is responsible for most of the x-rays in the diagnostic beam?
Increasing the kVp results in ______.
Total filtration in the x-ray beam includes ______.
The process whereby a radiographic image is created by variations in absorption and transmission of the exiting x-ray beam is known as ______.
Which processes occur during the x-ray beam interaction with tissue?
The ability of an x-ray photon to remove an atom's electron is a characteristic known as ______.
The x-ray interaction responsible for absorption is ______.
The x-ray interaction responsible for scattering is ______.
Remnant radiation is composed of what 2 things?
What interaction creates unwanted exposure to the image, known as fog?
What 2 factors would affect beam attenuation?
The low-density or high brightness areas on a radiographic image are created by ________.
An anatomic part that transmits the incoming x-ray photon would create an area of ______________ on the radiographic image.
The process of creating a radiographic image by differential absorption varies for film-screen and digital imaging.
An attribute (or attributes) of a radiographic image that affects the visibility of sharpness is _________.
A radiographic film image with many densities but little differences among them is said to have ________.
What is defined as the range of exposure intensities an image receptor can accurately detect?
What 2 factors would improve digital image quality?
Which of the following is accurate regarding the relationship between milliamperage (mA) and exposure time to maintain the exposure to the image receptor?
A radiographic film image has excessive density. What is best to do in order to correct the exposure error?
What exposure factor affects both the quality and the quantity of the x-ray beam?
What is not affected by kilovoltage?
How is the quality of the image affected when more than needed radiation exposure reaches the digital image receptor?
What would maintain radiation exposure to the image receptor when the kilovoltage is decreased by 15%?
Without exposure technique compensation, increasing the OID by 4 inches for a knee film image would:
Which factor does not affect the radiation exposure to the image receptor?
What exposure factor change is recommended to maintain radiation exposure to the image receptor when increasing patient thickness by 5 cm?
Instilling a negative contrast agent in the gastrointestinal tract has what effect in the area of interest on the digital image?
The projected shape of the unrestricted primary beam is _______________.
A purpose of beam-restricting devices is to _______________ by changing the size and shape of the primary beam.
The most effective type of beam-restricting device is the _______________.
Of the beam-restricting devices (cone, aperture diaphragm, collimator, cylinder), which two are most similar to one another?
The purpose of automatic collimation is to ensure that _______________.
When making a significant increase in collimation, _______________.
What increases as collimation increases?
What is true of positive beam-limiting devices?
The purpose of a grid in radiography is to _______________.
Grid ratio is defined as the ratio of the _______________.
Compared with parallel grids, focused grids _______________.
Which grid would a convergent line be formed if imaginary lines from its grid lines were drawn in space above it?
Grid cutoff, regardless of the cause, is most recognizable on a film radiograph as reduced ______.
Off-focus grid cutoff occurs by using an SID that is not ___________.
The type of motion most used for moving grids today is ________.
A grid should be used whenever the anatomic part size exceeds _____.
The air gap technique uses an increased ________ instead of a grid.
Created by: lkdickson