GXMO Digital Imaging Principles
UPDATED ACTUAL Exam Questions and
CORRECT Answers
The first step in the digital imaging process is - CORRECT ANSWER - Acquisition
The smallest component of an image matrix, that represents a specific location in the patient is a
- CORRECT ANSWER - Pixel
Adjustment of window level of a digital image viewed on the monitor allows adjustment of the
image - CORRECT ANSWER - Brightness (density)
Increasing the window width of a digital image on the monitor - CORRECT ANSWER -
Decrease the contrast of the image
Matrix size is the major determinant of image - CORRECT ANSWER - Resolution
Digital image noise from quantum mottle can be decreased by - CORRECT ANSWER -
Increasing the exposure
In ____________ image formation the analog to digital conversion step is eliminated -
CORRECT ANSWER - Direct digital radiography (DR)
Where is the latent image formed in computed radiography? - CORRECT ANSWER - In
the photostimulable Phosphor
What type of laser is used to release the energy stored in the CR phosphors? - CORRECT
ANSWER - Helium-neon
, In a CR system, what is the device that collects, amplifies and converts the released light to an
electronic signal? - CORRECT ANSWER - The photomultiplier tube
Prior to being reused, the CR imaging plate must be - CORRECT ANSWER - Exposed to
intense light
What are the mathematical calculations used for image construction for a specific examination
called? - CORRECT ANSWER - Algorithms
What post-processing technique is utilized to remove superimposing structures from the image? -
CORRECT ANSWER - Subtraction
What percentage is exposure error will result in poor image quality on a digital image? -
CORRECT ANSWER - 50%
What is the term for the graphic display of the range and quantity of pixel values during CR
image processing? - CORRECT ANSWER - Histogram
If the image matrix is increased and the pixel size is decreased to fill the matrix, what is the
effort on spatial resolution? - CORRECT ANSWER - Resolution increases
Compared with film-screen image receptors, digital receptors absorb ___________ lower energy
scatter radiation. - CORRECT ANSWER - More
The most common phosphor used for CR imaging plates is? - CORRECT ANSWER -
Barium fluorohalide bromides and Iodides with europium activators
When the CR imaging plate is scanned, the phosphors of the latent image release energy in the
form of? - CORRECT ANSWER - Light
UPDATED ACTUAL Exam Questions and
CORRECT Answers
The first step in the digital imaging process is - CORRECT ANSWER - Acquisition
The smallest component of an image matrix, that represents a specific location in the patient is a
- CORRECT ANSWER - Pixel
Adjustment of window level of a digital image viewed on the monitor allows adjustment of the
image - CORRECT ANSWER - Brightness (density)
Increasing the window width of a digital image on the monitor - CORRECT ANSWER -
Decrease the contrast of the image
Matrix size is the major determinant of image - CORRECT ANSWER - Resolution
Digital image noise from quantum mottle can be decreased by - CORRECT ANSWER -
Increasing the exposure
In ____________ image formation the analog to digital conversion step is eliminated -
CORRECT ANSWER - Direct digital radiography (DR)
Where is the latent image formed in computed radiography? - CORRECT ANSWER - In
the photostimulable Phosphor
What type of laser is used to release the energy stored in the CR phosphors? - CORRECT
ANSWER - Helium-neon
, In a CR system, what is the device that collects, amplifies and converts the released light to an
electronic signal? - CORRECT ANSWER - The photomultiplier tube
Prior to being reused, the CR imaging plate must be - CORRECT ANSWER - Exposed to
intense light
What are the mathematical calculations used for image construction for a specific examination
called? - CORRECT ANSWER - Algorithms
What post-processing technique is utilized to remove superimposing structures from the image? -
CORRECT ANSWER - Subtraction
What percentage is exposure error will result in poor image quality on a digital image? -
CORRECT ANSWER - 50%
What is the term for the graphic display of the range and quantity of pixel values during CR
image processing? - CORRECT ANSWER - Histogram
If the image matrix is increased and the pixel size is decreased to fill the matrix, what is the
effort on spatial resolution? - CORRECT ANSWER - Resolution increases
Compared with film-screen image receptors, digital receptors absorb ___________ lower energy
scatter radiation. - CORRECT ANSWER - More
The most common phosphor used for CR imaging plates is? - CORRECT ANSWER -
Barium fluorohalide bromides and Iodides with europium activators
When the CR imaging plate is scanned, the phosphors of the latent image release energy in the
form of? - CORRECT ANSWER - Light
