RTE 1401 EXAM 2 QUESTIONS + ANSWERS
Attenuation - Answer -reduction in intensity as the beam passes through matter
Automatic Rescaling - Answer -process by which images are produced with uniform brightness and
contrast regardless of the amount of exposure
Brightness - Answer -function of a display monitor; changes image lightness/darkness (density)
Density - Answer -DARKNESS
Direct Detector technology - Answer -uses amorphous selenium as the active detector material
Distortion - Answer -misrepresentation of the true size or shape of an object
(magnification and true distortion are two types)
Exposure Index (EI) - Answer -Numeric representation of the total x-ray exposure to the receptor (S-
value)
Exposure Latitude - Answer -Range of exposures that can be used and still result in the capture of a
diagnostic quality image
Grid - Answer -device consisting of thin lead strips cleans up scattor
Indirect Detector technology - Answer -2-step process that uses amorphous silicon to covert x-ray
energy to light and then to electrons
Latent Image - Answer -invisible image created after exposure but before processing
Penetrating Ability - Answer -ability of an x-ray beam to pass through an object; controlled by the
kilovolt peak of the beam
Primary Radiation - Answer -X-ray beam after it leaves the x-ray tube and before it reaches the
object
Three major classifications of diagnostic radiographic imaging - Answer -film/screen radiography
fluoroscopic imaging
digital or computerize imaging
Four requirements to produce an x-ray - Answer -vacuum
source of electrons
method to accelerate electrons
method to stop the electrons
Scatter radiation - Answer -non-diagnostic radiation photons that interact with the body's matter in
such a way that the resulting photon continues its travel in a different direction. (may or may not
actually reach image receptor)
photographic factor - Answer -density- kVp (color)
contrast- mAs
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, geometric factors - Answer -recorded detail (magnification)
- SID
-OID
distortion (depth perseption
-Size
-Shape
Source-to-image distance (SID) - Answer -standardized distance between the point of x-ray emission
in the x-ray tube (Focal spot) and the image receptor - affects the relative intensity of the radiation as
it reaches the image receptor
window level - Answer -controls image brightness
window width - Answer -controls contrast
Object-to-image distance (OID) - Answer -distance between patient and image receptor
Deviation Index (DI) - Answer -effective measure of actual radiation exposure to patient
barium fluorohalide crystals - Answer -exposure plate is stored in this medium -they create electron
"traps"
contrast - Answer -visible differences between adjacent radiographic densities (shades of gray)
classes of radiation - Answer -Primary radiation
Scatter radiation
Absorbed radiation
Remnant radiation
requirements for the production of x-rays - Answer -(1) Vacuum (tube housing)
(2) Source of electrons (filament)
(3) Method to accelerate the electrons(voltage) rapidly
(4) Method to stop the electrons (target)
primary radiation - Answer -x-ray beam after it leaves the x-ray tube and before it reaches the
patient's body
remnant radiation - Answer -radiation resulting after the beam exits the patient's body
scatter radiation - Answer -an x-ray photon that interacts with the body's matter in such a way that
the resulting photon continues its travel in a different direction
radiolucent - Answer -allow x-ray photons to pass through comparatively easily
radiopaque - Answer -materials are not easily penetrable
milliampere-seconds (mAs) - Answer -the parameter that controls the total amount or quantity of x-
radiation produced
millamperage - Answer -the measure of electrical current passing through the x-ray tube
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Attenuation - Answer -reduction in intensity as the beam passes through matter
Automatic Rescaling - Answer -process by which images are produced with uniform brightness and
contrast regardless of the amount of exposure
Brightness - Answer -function of a display monitor; changes image lightness/darkness (density)
Density - Answer -DARKNESS
Direct Detector technology - Answer -uses amorphous selenium as the active detector material
Distortion - Answer -misrepresentation of the true size or shape of an object
(magnification and true distortion are two types)
Exposure Index (EI) - Answer -Numeric representation of the total x-ray exposure to the receptor (S-
value)
Exposure Latitude - Answer -Range of exposures that can be used and still result in the capture of a
diagnostic quality image
Grid - Answer -device consisting of thin lead strips cleans up scattor
Indirect Detector technology - Answer -2-step process that uses amorphous silicon to covert x-ray
energy to light and then to electrons
Latent Image - Answer -invisible image created after exposure but before processing
Penetrating Ability - Answer -ability of an x-ray beam to pass through an object; controlled by the
kilovolt peak of the beam
Primary Radiation - Answer -X-ray beam after it leaves the x-ray tube and before it reaches the
object
Three major classifications of diagnostic radiographic imaging - Answer -film/screen radiography
fluoroscopic imaging
digital or computerize imaging
Four requirements to produce an x-ray - Answer -vacuum
source of electrons
method to accelerate electrons
method to stop the electrons
Scatter radiation - Answer -non-diagnostic radiation photons that interact with the body's matter in
such a way that the resulting photon continues its travel in a different direction. (may or may not
actually reach image receptor)
photographic factor - Answer -density- kVp (color)
contrast- mAs
1/
11
, geometric factors - Answer -recorded detail (magnification)
- SID
-OID
distortion (depth perseption
-Size
-Shape
Source-to-image distance (SID) - Answer -standardized distance between the point of x-ray emission
in the x-ray tube (Focal spot) and the image receptor - affects the relative intensity of the radiation as
it reaches the image receptor
window level - Answer -controls image brightness
window width - Answer -controls contrast
Object-to-image distance (OID) - Answer -distance between patient and image receptor
Deviation Index (DI) - Answer -effective measure of actual radiation exposure to patient
barium fluorohalide crystals - Answer -exposure plate is stored in this medium -they create electron
"traps"
contrast - Answer -visible differences between adjacent radiographic densities (shades of gray)
classes of radiation - Answer -Primary radiation
Scatter radiation
Absorbed radiation
Remnant radiation
requirements for the production of x-rays - Answer -(1) Vacuum (tube housing)
(2) Source of electrons (filament)
(3) Method to accelerate the electrons(voltage) rapidly
(4) Method to stop the electrons (target)
primary radiation - Answer -x-ray beam after it leaves the x-ray tube and before it reaches the
patient's body
remnant radiation - Answer -radiation resulting after the beam exits the patient's body
scatter radiation - Answer -an x-ray photon that interacts with the body's matter in such a way that
the resulting photon continues its travel in a different direction
radiolucent - Answer -allow x-ray photons to pass through comparatively easily
radiopaque - Answer -materials are not easily penetrable
milliampere-seconds (mAs) - Answer -the parameter that controls the total amount or quantity of x-
radiation produced
millamperage - Answer -the measure of electrical current passing through the x-ray tube
2/
11
