CRDR FINAL EXAM REVIEW NEWEST 2025/2026 ACTUAL
EXAM COMPLETE QUESTIONS AND ACCURATE ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+||current
update! update2026.
Conventional Radiography uses _________and _______ in the image formation process -
CORRECT ANSWER-Film
intensifying screens
Indirect-Conversion DR - CORRECT ANSWER-A DR unit, whose image receptor first converts
incoming x-rays directly into light using phosphor layers, then converts the light into electrical
charge
Direct-Conversion DR - CORRECT ANSWER-use of an AMA as an image receptor, which
converts x-ray exposure into an electrical signal that can be fed into a computer for processing
manipulation
DICOM - CORRECT ANSWER-Digital Imaging and Communications in Medicine; guidelines
which standardize the behavior of all various digital devices used in PACS
HIS - CORRECT ANSWER-Hospital Information System; which stores and manages all images,
lab results, reports, billing and demographic information on every patient
CCD - CORRECT ANSWER-charged-coupled devices; A flat, compact light-sensing device that
uses a single layer of silicon as its sensitive surface, used for recording images
Film/Screen images are recorded in a _________ fashion, whereas digital image capture
is__________. - CORRECT ANSWER-logarithmic linear
technical choices: digital imaging results in a _______ image that captures nearly all of the
________. - CORRECT ANSWER-raw x-ray photons
,Film/screen falls under what category? - CORRECT ANSWER-Analog
Flat Panel Detector (FPD) - CORRECT ANSWER-consist of a photoconductor, amorphous
selenium, which holds a charge on its surface, that can be read out by a TFT.
FPD fall under which category? - CORRECT ANSWER-DR
CR is a ___ step process - CORRECT ANSWER-3
DR is a ___ step process - CORRECT ANSWER-2
Indirect capture DR - CORRECT ANSWER--absorb x-ray and convert it into light
-the light is then collected by a CCD or TFT or CMOS array and converted into an electrical
signal
-electrical signal is then sent to computer for processing
Direct capture DR - CORRECT ANSWER--devices convert the incident x-ray energy directly into
an electrical signal, typically using a photoconductor as the X-ray absorber
-then the electrical signal is sent to a TFT and then to an ADC
-The ADC signal goes to the computer for processing and viewing
What is the activator in PSP systems? - CORRECT ANSWER-europium
Latent Image formation: Analog - CORRECT ANSWER--x-rays strike intensifying screen -light is
emitted
-and film is exposed to light
Latent Image formation: PSP - CORRECT ANSWER-X-rays strike phosphor plate
-x-ray energy deposited in the phosphor
, -energy is released from phosphor when stimulated by light in reader
Latent Image formation: FPD (Indirect) - CORRECT ANSWER--x-ray strikes detector
-phosphor emits light (silicon and TFT)
-detects light and converts it to electrical signal
Latent image formation: FPD (direct) - CORRECT ANSWER--x-ray strikes detector -x-rays
detected by photoconductor and converted to electrical signal
Converts Light into electrons: - CORRECT ANSWER-photodetector
What is the definition of amorphous? - CORRECT ANSWER-a non-crystalline state of an
otherwise crystalline material
_____________ releases electrons when struck by light photons
and _____________ releases electrons when struck by x-ray photons - CORRECT
ANSWERAmorphous s(I)licon and amorphous S(e)lenium
What is the advantage of film/screen over digital? - CORRECT ANSWER-better spatial resolution
A numerical value that is representative of the amount of radiation that strikes the digital image
receptor is termed: - CORRECT ANSWER-exposure indicator
Highly complex mathematical formula: - CORRECT ANSWER-Algorithm
Random disturbance that obscures or reduces clarity is the definition for: - CORRECT
ANSWERNoise
Adjusting the window level or window width is known as: - CORRECT ANSWER-Windowing
EXAM COMPLETE QUESTIONS AND ACCURATE ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+||current
update! update2026.
Conventional Radiography uses _________and _______ in the image formation process -
CORRECT ANSWER-Film
intensifying screens
Indirect-Conversion DR - CORRECT ANSWER-A DR unit, whose image receptor first converts
incoming x-rays directly into light using phosphor layers, then converts the light into electrical
charge
Direct-Conversion DR - CORRECT ANSWER-use of an AMA as an image receptor, which
converts x-ray exposure into an electrical signal that can be fed into a computer for processing
manipulation
DICOM - CORRECT ANSWER-Digital Imaging and Communications in Medicine; guidelines
which standardize the behavior of all various digital devices used in PACS
HIS - CORRECT ANSWER-Hospital Information System; which stores and manages all images,
lab results, reports, billing and demographic information on every patient
CCD - CORRECT ANSWER-charged-coupled devices; A flat, compact light-sensing device that
uses a single layer of silicon as its sensitive surface, used for recording images
Film/Screen images are recorded in a _________ fashion, whereas digital image capture
is__________. - CORRECT ANSWER-logarithmic linear
technical choices: digital imaging results in a _______ image that captures nearly all of the
________. - CORRECT ANSWER-raw x-ray photons
,Film/screen falls under what category? - CORRECT ANSWER-Analog
Flat Panel Detector (FPD) - CORRECT ANSWER-consist of a photoconductor, amorphous
selenium, which holds a charge on its surface, that can be read out by a TFT.
FPD fall under which category? - CORRECT ANSWER-DR
CR is a ___ step process - CORRECT ANSWER-3
DR is a ___ step process - CORRECT ANSWER-2
Indirect capture DR - CORRECT ANSWER--absorb x-ray and convert it into light
-the light is then collected by a CCD or TFT or CMOS array and converted into an electrical
signal
-electrical signal is then sent to computer for processing
Direct capture DR - CORRECT ANSWER--devices convert the incident x-ray energy directly into
an electrical signal, typically using a photoconductor as the X-ray absorber
-then the electrical signal is sent to a TFT and then to an ADC
-The ADC signal goes to the computer for processing and viewing
What is the activator in PSP systems? - CORRECT ANSWER-europium
Latent Image formation: Analog - CORRECT ANSWER--x-rays strike intensifying screen -light is
emitted
-and film is exposed to light
Latent Image formation: PSP - CORRECT ANSWER-X-rays strike phosphor plate
-x-ray energy deposited in the phosphor
, -energy is released from phosphor when stimulated by light in reader
Latent Image formation: FPD (Indirect) - CORRECT ANSWER--x-ray strikes detector
-phosphor emits light (silicon and TFT)
-detects light and converts it to electrical signal
Latent image formation: FPD (direct) - CORRECT ANSWER--x-ray strikes detector -x-rays
detected by photoconductor and converted to electrical signal
Converts Light into electrons: - CORRECT ANSWER-photodetector
What is the definition of amorphous? - CORRECT ANSWER-a non-crystalline state of an
otherwise crystalline material
_____________ releases electrons when struck by light photons
and _____________ releases electrons when struck by x-ray photons - CORRECT
ANSWERAmorphous s(I)licon and amorphous S(e)lenium
What is the advantage of film/screen over digital? - CORRECT ANSWER-better spatial resolution
A numerical value that is representative of the amount of radiation that strikes the digital image
receptor is termed: - CORRECT ANSWER-exposure indicator
Highly complex mathematical formula: - CORRECT ANSWER-Algorithm
Random disturbance that obscures or reduces clarity is the definition for: - CORRECT
ANSWERNoise
Adjusting the window level or window width is known as: - CORRECT ANSWER-Windowing
