Intro to Radiographic Imaging Final Exam
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Digital images are stored and distributed by the - CORRECT ANSWER - PACS
Digital images can demonstrate more shades of gray than an image on film because - CORRECT
ANSWER - each pixel can produce over a thousand shades of gray.
When choosing an image receptor for CR, to produce the greatest image resolution one must -
CORRECT ANSWER - use the smallest image receptor compatible with the size of the
part.
The CR PSP imaging receptor is very sensitive to scatter radiation and image fog. To reduce this
a radiographer should - CORRECT ANSWER - *erase the plate if it has been sitting
unused over night and collimate to part size
Computed radiography is also referred to as - CORRECT ANSWER - PSP technology
Indirect DR with a flat panel uses ( ) as the detector material - CORRECT ANSWER -
amorphous silicon
Images that can be acquired, processed and manipulated is a definition of - CORRECT
ANSWER - digital imaging
A disadvantage of film/screen imaging is that - CORRECT ANSWER - *there is only one
copy of the image
*kvp controls contrast
*too much mAs makes the radiograph dark
*ALL the ABOVE
,Which type of digital imaging requires a process that is most like film/screen imaging? -
CORRECT ANSWER - Computed Radiography (CR)
Which of the following processes describes the Computed Radiography (DR) imaging process -
CORRECT ANSWER - Phosphor plate--> laser light scanner-->photomultiplier tube--
>ADC--->computer
When matrix size gets larger, pixel sizes get ----- - CORRECT ANSWER - smaller
Digital radiographic systems are prone to OVER exposing the patient and violating the principle
of ALARA by - CORRECT ANSWER - *technique used can be up to 200% too much
*There is little feedback about the amount of exposure used to modify technique.
*automatic rescaling of the image
*All the above!
of all the choices the greatest ALARA violation would be - CORRECT ANSWER -
repeating an image with a S # of 210 because of exposure technique
When using CR technology it is important to remember that - CORRECT ANSWER -
*The IP is extra sensitive to exposure after initial X-ray exposure
*the IP will lose about 25% of its signal in 8 hr if not processed
*the IP is sensitive to scatter , making grids very important
*ALL the Above
In the technology of CR, the latent image is actually - CORRECT ANSWER - electrons
trapped in conduction bands in the atoms
in CR technology, preprocessing of data includes - CORRECT ANSWER - *histogram
analysis
, *grayscale analysis
*exposure data recognition (EDR)
*ALL the above
In digital image technology, once the image data is sent to PACS - CORRECT ANSWER -
the data is fixed and not able to be reprocessed
A common feature between indirect and direct DR technology is - CORRECT ANSWER -
the use of thin film transistors (tFT's)
Computerized digital images consist of a ( )of picture elements,each with a density pixel value or
gray shade. - CORRECT ANSWER - Matrix
In digital image processing , the digital data set is arranged into histogram in order to determine
the - CORRECT ANSWER - Values of Interest (VOI'S)
The purpose of a LUT is to - CORRECT ANSWER - apply a predetermined scale of
contrast to the digital data set.
The radiographer can improve image noise on an image by - CORRECT ANSWER -
increasing the exposure technique (mAs)
Of the choices , the best S:N ratio is - CORRECT ANSWER - 1000:1
An S value of 200 represents an - CORRECT ANSWER - exposure to the IP of 1 MR
When changing exposure technique from 9 mAs to 18 mAs using Konica or Fuji computed
radiography system the radiographer should expect - CORRECT ANSWER - a decrease in
S# from 200 to 100
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Digital images are stored and distributed by the - CORRECT ANSWER - PACS
Digital images can demonstrate more shades of gray than an image on film because - CORRECT
ANSWER - each pixel can produce over a thousand shades of gray.
When choosing an image receptor for CR, to produce the greatest image resolution one must -
CORRECT ANSWER - use the smallest image receptor compatible with the size of the
part.
The CR PSP imaging receptor is very sensitive to scatter radiation and image fog. To reduce this
a radiographer should - CORRECT ANSWER - *erase the plate if it has been sitting
unused over night and collimate to part size
Computed radiography is also referred to as - CORRECT ANSWER - PSP technology
Indirect DR with a flat panel uses ( ) as the detector material - CORRECT ANSWER -
amorphous silicon
Images that can be acquired, processed and manipulated is a definition of - CORRECT
ANSWER - digital imaging
A disadvantage of film/screen imaging is that - CORRECT ANSWER - *there is only one
copy of the image
*kvp controls contrast
*too much mAs makes the radiograph dark
*ALL the ABOVE
,Which type of digital imaging requires a process that is most like film/screen imaging? -
CORRECT ANSWER - Computed Radiography (CR)
Which of the following processes describes the Computed Radiography (DR) imaging process -
CORRECT ANSWER - Phosphor plate--> laser light scanner-->photomultiplier tube--
>ADC--->computer
When matrix size gets larger, pixel sizes get ----- - CORRECT ANSWER - smaller
Digital radiographic systems are prone to OVER exposing the patient and violating the principle
of ALARA by - CORRECT ANSWER - *technique used can be up to 200% too much
*There is little feedback about the amount of exposure used to modify technique.
*automatic rescaling of the image
*All the above!
of all the choices the greatest ALARA violation would be - CORRECT ANSWER -
repeating an image with a S # of 210 because of exposure technique
When using CR technology it is important to remember that - CORRECT ANSWER -
*The IP is extra sensitive to exposure after initial X-ray exposure
*the IP will lose about 25% of its signal in 8 hr if not processed
*the IP is sensitive to scatter , making grids very important
*ALL the Above
In the technology of CR, the latent image is actually - CORRECT ANSWER - electrons
trapped in conduction bands in the atoms
in CR technology, preprocessing of data includes - CORRECT ANSWER - *histogram
analysis
, *grayscale analysis
*exposure data recognition (EDR)
*ALL the above
In digital image technology, once the image data is sent to PACS - CORRECT ANSWER -
the data is fixed and not able to be reprocessed
A common feature between indirect and direct DR technology is - CORRECT ANSWER -
the use of thin film transistors (tFT's)
Computerized digital images consist of a ( )of picture elements,each with a density pixel value or
gray shade. - CORRECT ANSWER - Matrix
In digital image processing , the digital data set is arranged into histogram in order to determine
the - CORRECT ANSWER - Values of Interest (VOI'S)
The purpose of a LUT is to - CORRECT ANSWER - apply a predetermined scale of
contrast to the digital data set.
The radiographer can improve image noise on an image by - CORRECT ANSWER -
increasing the exposure technique (mAs)
Of the choices , the best S:N ratio is - CORRECT ANSWER - 1000:1
An S value of 200 represents an - CORRECT ANSWER - exposure to the IP of 1 MR
When changing exposure technique from 9 mAs to 18 mAs using Konica or Fuji computed
radiography system the radiographer should expect - CORRECT ANSWER - a decrease in
S# from 200 to 100
