RTE 1401 TEST EXAM 1 STUDY GUID
QUESTIONS AND ANSWERS
Attenuation - Correct Answer reduction in intensity as the beam passes through matter
Automatic Rescaling - Correct Answer process by which images are produced with
uniform brightness and contrast regardless of the amount of exposure
Brightness - Correct Answer function of a display monitor; changes image
lightness/darkness (density)
Density - Correct Answer DARKNESS
Direct Detector technology - Correct Answer uses amorphous selenium as the active
detector material
Distortion - Correct Answer misrepresentation of the true size or shape of an object
(magnification and true distortion are two types)
Exposure Index (EI) - Correct Answer Numeric representation of the total x-ray
exposure to the receptor (S-value)
Exposure Latitude - Correct Answer Range of exposures that can be used and still
result in the capture of a diagnostic quality image
Grid - Correct Answer device consisting of thin lead strips cleans up scattor
Indirect Detector technology - Correct Answer 2-step process that uses amorphous
silicon to covert x-ray energy to light and then to electrons
Latent Image - Correct Answer invisible image created after exposure but before
processing
Penetrating Ability - Correct Answer ability of an x-ray beam to pass through an object;
controlled by the kilovolt peak of the beam
Primary Radiation - Correct Answer X-ray beam after it leaves the x-ray tube and before
it reaches the object
Three major classifications of diagnostic radiographic imaging - Correct Answer
film/screen radiography
fluoroscopic imaging
digital or computerize imaging
Four requirements to produce an x-ray - Correct Answer vacuum
, source of electrons
method to accelerate electrons
method to stop the electrons
Scatter radiation - Correct 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 - Correct Answer density- kVp (color)
contrast- mAs
geometric factors - Correct Answer recorded detail (magnification)
- SID
-OID
distortion (depth perseption
-Size
-Shape
Source-to-image distance (SID) - Correct 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 - Correct Answer controls image brightness
window width - Correct Answer controls contrast
Object-to-image distance (OID) - Correct Answer distance between patient and image
receptor
Deviation Index (DI) - Correct Answer effective measure of actual radiation exposure to
patient
barium fluorohalide crystals - Correct Answer exposure plate is stored in this medium -
they create electron "traps"
contrast - Correct Answer visible differences between adjacent radiographic densities
(shades of gray)
classes of radiation - Correct Answer Primary radiation
Scatter radiation
Absorbed radiation
Remnant radiation
requirements for the production of x-rays - Correct Answer (1) Vacuum (tube housing)
(2) Source of electrons (filament)
(3) Method to accelerate the electrons(voltage) rapidly
QUESTIONS AND ANSWERS
Attenuation - Correct Answer reduction in intensity as the beam passes through matter
Automatic Rescaling - Correct Answer process by which images are produced with
uniform brightness and contrast regardless of the amount of exposure
Brightness - Correct Answer function of a display monitor; changes image
lightness/darkness (density)
Density - Correct Answer DARKNESS
Direct Detector technology - Correct Answer uses amorphous selenium as the active
detector material
Distortion - Correct Answer misrepresentation of the true size or shape of an object
(magnification and true distortion are two types)
Exposure Index (EI) - Correct Answer Numeric representation of the total x-ray
exposure to the receptor (S-value)
Exposure Latitude - Correct Answer Range of exposures that can be used and still
result in the capture of a diagnostic quality image
Grid - Correct Answer device consisting of thin lead strips cleans up scattor
Indirect Detector technology - Correct Answer 2-step process that uses amorphous
silicon to covert x-ray energy to light and then to electrons
Latent Image - Correct Answer invisible image created after exposure but before
processing
Penetrating Ability - Correct Answer ability of an x-ray beam to pass through an object;
controlled by the kilovolt peak of the beam
Primary Radiation - Correct Answer X-ray beam after it leaves the x-ray tube and before
it reaches the object
Three major classifications of diagnostic radiographic imaging - Correct Answer
film/screen radiography
fluoroscopic imaging
digital or computerize imaging
Four requirements to produce an x-ray - Correct Answer vacuum
, source of electrons
method to accelerate electrons
method to stop the electrons
Scatter radiation - Correct 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 - Correct Answer density- kVp (color)
contrast- mAs
geometric factors - Correct Answer recorded detail (magnification)
- SID
-OID
distortion (depth perseption
-Size
-Shape
Source-to-image distance (SID) - Correct 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 - Correct Answer controls image brightness
window width - Correct Answer controls contrast
Object-to-image distance (OID) - Correct Answer distance between patient and image
receptor
Deviation Index (DI) - Correct Answer effective measure of actual radiation exposure to
patient
barium fluorohalide crystals - Correct Answer exposure plate is stored in this medium -
they create electron "traps"
contrast - Correct Answer visible differences between adjacent radiographic densities
(shades of gray)
classes of radiation - Correct Answer Primary radiation
Scatter radiation
Absorbed radiation
Remnant radiation
requirements for the production of x-rays - Correct Answer (1) Vacuum (tube housing)
(2) Source of electrons (filament)
(3) Method to accelerate the electrons(voltage) rapidly
