Chapter 20 - Digital Image Processing Questions and Answers Already Passed Latest 2025
With the discovery of__ __ in the 1970s, radiology began its early entry into the digital world - Answers
Computed tomography
Created the concept of electronic data sets for medical images - Answers Computed tomography
Digital Ra diography imaging systems replace traditional film with a - Answers Reusable detector
What are the two types of digital radiography imaging systems? - Answers Computed radiography and
digital radiography
Use a photostimulable storage phosphor imaging plate - Answers Computed radiography
once the psp is exposed, the cassette - Answers Is taken to a reader to process the plate and create the
image
With CR, there is a two step process because - Answers The radiographer must move the detector
between image acquisition and display
Typically have the detector and reader that are a permanent part of a table or wall unit - Answers Digital
radiography
Cassette is not needed - Answers DR
The image is acquired and sent directly to the display monitor, without the need for the radiographer to
physically move the detector for the image to be processed - Answers DR
Is faster and more efficient at creating images - Answers DR
Providence hospital has __ radiography - Answers Computed
DR systems can be categorized as - Answers Direct or indirect conversion
Use a two-part process involving a scintillator and a photodetector - Answers Indirect conversion
Converts incoming X-ray photons to light - Answers scintillator
Converts light into an electrical signal - Answers Photodetector
One standard that has been central to the development of modern radiological imaging is the - Answers
DICOM - Digital Imaging and Communication in Medicine
What does the Radiological imaging community prefer DICOM? - Answers To ensure that all equipment
from all manufacture who choose to adhere to the standard is speaking the same computer language
that can be understood across manufacturer and device lines
, What is a digital image? - Answers Has been converted into numerical values for transmission or
processing
The electronic devices that produce radiographic images, - Answers By design produce analog signals
What does analog signals consists of? - Answers A series of voltage fluctuations on a continuous
waveform with infinite values between an upper and lower value
Computers operate using a ____ language. - Answers binary
Analog signals must by converted to a binary language through a process called - Answers Analog-to-
digital conversion (ADC)
Consisted of sampling and quantification - Answers ADC
What happens during sampling? - Answers The analog voltage values are measured at a chosen
sampling frequency on the analog waveform
Each sampled piece of analog data is then computed and assigned a discrete analog value - Answers
Quantification
The binary system operates with a - Answers Two-symbol alphabet
0 for - Answers Off
1 for - Answers On
Each binary number is called a - Answers bit
Nominal numbers function on a base ____ system - Answers 10
An 8-bit word is called a ___. - Answers byte
Computerized digital images are described in terms of the - Answers Number of values displayed per
image
Is a series of boxes laid out in rows and columns that gives form to the image - Answers Matrix
Each box of an image matrix will display a numerical value that can be transformed into a - Answers
Visual brightness or gray levels
The individual matrix boxes are - Answers Pixels
Each pixel location is determined by its - Answers address
The total number of pixels in the matrix would be calcifies by - Answers Multiplying the number of boxes
in the row by the number of boxes in the column
In radiography, each pixel represents a - Answers 2D data point
With the discovery of__ __ in the 1970s, radiology began its early entry into the digital world - Answers
Computed tomography
Created the concept of electronic data sets for medical images - Answers Computed tomography
Digital Ra diography imaging systems replace traditional film with a - Answers Reusable detector
What are the two types of digital radiography imaging systems? - Answers Computed radiography and
digital radiography
Use a photostimulable storage phosphor imaging plate - Answers Computed radiography
once the psp is exposed, the cassette - Answers Is taken to a reader to process the plate and create the
image
With CR, there is a two step process because - Answers The radiographer must move the detector
between image acquisition and display
Typically have the detector and reader that are a permanent part of a table or wall unit - Answers Digital
radiography
Cassette is not needed - Answers DR
The image is acquired and sent directly to the display monitor, without the need for the radiographer to
physically move the detector for the image to be processed - Answers DR
Is faster and more efficient at creating images - Answers DR
Providence hospital has __ radiography - Answers Computed
DR systems can be categorized as - Answers Direct or indirect conversion
Use a two-part process involving a scintillator and a photodetector - Answers Indirect conversion
Converts incoming X-ray photons to light - Answers scintillator
Converts light into an electrical signal - Answers Photodetector
One standard that has been central to the development of modern radiological imaging is the - Answers
DICOM - Digital Imaging and Communication in Medicine
What does the Radiological imaging community prefer DICOM? - Answers To ensure that all equipment
from all manufacture who choose to adhere to the standard is speaking the same computer language
that can be understood across manufacturer and device lines
, What is a digital image? - Answers Has been converted into numerical values for transmission or
processing
The electronic devices that produce radiographic images, - Answers By design produce analog signals
What does analog signals consists of? - Answers A series of voltage fluctuations on a continuous
waveform with infinite values between an upper and lower value
Computers operate using a ____ language. - Answers binary
Analog signals must by converted to a binary language through a process called - Answers Analog-to-
digital conversion (ADC)
Consisted of sampling and quantification - Answers ADC
What happens during sampling? - Answers The analog voltage values are measured at a chosen
sampling frequency on the analog waveform
Each sampled piece of analog data is then computed and assigned a discrete analog value - Answers
Quantification
The binary system operates with a - Answers Two-symbol alphabet
0 for - Answers Off
1 for - Answers On
Each binary number is called a - Answers bit
Nominal numbers function on a base ____ system - Answers 10
An 8-bit word is called a ___. - Answers byte
Computerized digital images are described in terms of the - Answers Number of values displayed per
image
Is a series of boxes laid out in rows and columns that gives form to the image - Answers Matrix
Each box of an image matrix will display a numerical value that can be transformed into a - Answers
Visual brightness or gray levels
The individual matrix boxes are - Answers Pixels
Each pixel location is determined by its - Answers address
The total number of pixels in the matrix would be calcifies by - Answers Multiplying the number of boxes
in the row by the number of boxes in the column
In radiography, each pixel represents a - Answers 2D data point
