LRA 221 Final Exams STUDY BUNDLE PACKAGE|
Questions and Verified Answers - (2024/ 2025
Update) 100% Correct
a standard that allows imaging modalities and PACS to communicate in the same
language - ANSWERDICOM
The phosphor layer is made of phosphors from the ______ family. - ANSWERbarium
fluorohalide
Each square in a matrix is called a: - ANSWERpicture element
what is DQE (Detective Quantum Efficiency) - ANSWEREfficiency of a system to
convert xray input into a useful output image
The type of flat-panel detector that uses thin films of silicon integrated with arrays of
photodiodes - ANSWERamorphous silicon detector
X-ray energy direct capture DR will stimulate a ______, which eventually is changed
into an electrical signal. - ANSWERPhotoconductor
Exposure latitude is equal what in DR - ANSWERDynamic range
High pass filtering is useful for enhancing - ANSWEROrgans and soft tissue
Higher kvp does what to the histogram - ANSWERNarrow
Changing the slope of the LUT graph will change what - ANSWERContrast
The improper algorithm application may result in - ANSWERdegradation of the image
Suppressing frequencies in the areas of interest is known as - ANSWERmasking
Image manipulation that fills in the background to make it dark - ANSWERShuttering
What is the smallest element in digital imaging - ANSWERPixel
Number is bits per pixel is known as - ANSWERBit depth
Focal spot and OID affect image sharpness - ANSWERIn both film/screen and digital
imaging
images are produced with uniform brightness and contrast, regardless of the amount
of exposure used to acquire the image. - ANSWERautomatic rescaling
, The longer the image is stored on the cassette in cr - ANSWERThe more energy is lost
by the electrons
X ray strike the intensifying screen - ANSWERLight is produced
Indirect and direct radiography both do not use what - ANSWERA PSP
Photoconductor converts light energy into - ANSWERElectrical signal
What are the two steps for the machine for indirect radiography - ANSWER1.
Convert photons to light via the scintillator
2. Light to electrical signal via the photoconductor
What is the 1 step for the machine for direct digital radiography -
ANSWERPhotoconductor. Immediate ADC conversion
What are the two steps for the tech in computed radiography - ANSWER1. Expose
cassette
2. Place cassette into digitizer for ADC conversion
What is the active element in phosphor plates - ANSWERBarium fluorohalide
PSP readers scan the phosphor plate with a - ANSWERFocused laser light
What does a charged coupled device replace - ANSWERADC and photomultiplier
tube
(CR) Photon energy is deposited within the phosphor particles creating - ANSWERThe
latent image
A focused laser light scans the latent image - ANSWERRelease the manifest image
Cr cassette can not be stored where - ANSWERIn the xray room near radiation source
Indirect dr what are the two different types - ANSWERThin film transistor TFT
charged coupled device
Three layers of Indirect TFT - ANSWERScintillation
Photodiode
TFT
Two layers of indirect ccd - ANSWERScintillation
Sensor chip
Another name for direct conversion - ANSWERNon scintillation
Questions and Verified Answers - (2024/ 2025
Update) 100% Correct
a standard that allows imaging modalities and PACS to communicate in the same
language - ANSWERDICOM
The phosphor layer is made of phosphors from the ______ family. - ANSWERbarium
fluorohalide
Each square in a matrix is called a: - ANSWERpicture element
what is DQE (Detective Quantum Efficiency) - ANSWEREfficiency of a system to
convert xray input into a useful output image
The type of flat-panel detector that uses thin films of silicon integrated with arrays of
photodiodes - ANSWERamorphous silicon detector
X-ray energy direct capture DR will stimulate a ______, which eventually is changed
into an electrical signal. - ANSWERPhotoconductor
Exposure latitude is equal what in DR - ANSWERDynamic range
High pass filtering is useful for enhancing - ANSWEROrgans and soft tissue
Higher kvp does what to the histogram - ANSWERNarrow
Changing the slope of the LUT graph will change what - ANSWERContrast
The improper algorithm application may result in - ANSWERdegradation of the image
Suppressing frequencies in the areas of interest is known as - ANSWERmasking
Image manipulation that fills in the background to make it dark - ANSWERShuttering
What is the smallest element in digital imaging - ANSWERPixel
Number is bits per pixel is known as - ANSWERBit depth
Focal spot and OID affect image sharpness - ANSWERIn both film/screen and digital
imaging
images are produced with uniform brightness and contrast, regardless of the amount
of exposure used to acquire the image. - ANSWERautomatic rescaling
, The longer the image is stored on the cassette in cr - ANSWERThe more energy is lost
by the electrons
X ray strike the intensifying screen - ANSWERLight is produced
Indirect and direct radiography both do not use what - ANSWERA PSP
Photoconductor converts light energy into - ANSWERElectrical signal
What are the two steps for the machine for indirect radiography - ANSWER1.
Convert photons to light via the scintillator
2. Light to electrical signal via the photoconductor
What is the 1 step for the machine for direct digital radiography -
ANSWERPhotoconductor. Immediate ADC conversion
What are the two steps for the tech in computed radiography - ANSWER1. Expose
cassette
2. Place cassette into digitizer for ADC conversion
What is the active element in phosphor plates - ANSWERBarium fluorohalide
PSP readers scan the phosphor plate with a - ANSWERFocused laser light
What does a charged coupled device replace - ANSWERADC and photomultiplier
tube
(CR) Photon energy is deposited within the phosphor particles creating - ANSWERThe
latent image
A focused laser light scans the latent image - ANSWERRelease the manifest image
Cr cassette can not be stored where - ANSWERIn the xray room near radiation source
Indirect dr what are the two different types - ANSWERThin film transistor TFT
charged coupled device
Three layers of Indirect TFT - ANSWERScintillation
Photodiode
TFT
Two layers of indirect ccd - ANSWERScintillation
Sensor chip
Another name for direct conversion - ANSWERNon scintillation
