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LRA 221 Finals Exam Questions And Answers
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LRA 221 Finals Exam Questions And AnswersFilm and intensifying screens are used primarily in? - Answer conventional radiography
CR acquires an image through: - Answer The use of a storage phosphor plate
Technologist efficiency ratings are generally comparable when comparing conventional
radiography with ______ radiography. - Answer computed
The active element in a storage phosphor is: - Answer barium fluorohalide
Regarding PSP image capture, which of the following is scanned over the phosphor
plate to release the latent image? Answer Focused laser light
X-ray energy related in indirect capture DR will stimulate a _________ changed into an
electrical signal. Answer Scintillator
The _______converts x-ray energy directly to a digital electrical signal. Answer
photoconductor
Exposure latitude is to conventional radiography as _______ is to DR. Answer dynamic
range
A look-up table maps: - Answer image grayscale values
All of the following are components of a PACS except - Answer independent kilovoltage
peak and milliampere-second stations.
, Like CR, DR is able to utilize the same diagnostic equipment as exists in today's imaging
departments. - Answer False-Can't use the same equipment
Indirect capture DR converts absorbed x-ray energy into visible light. - Answer True-
indirect DR convert X-ray energy to visible light
This is the standard that enables the imaging modalities and the PACS to speak a
common language. - True
Which one of the following statements is not true? Changing the matrix and the FOV will
not change the size of the pixel. - Not true
Each square in a matrix is called a - picture element
The number of bits per pixel is known as bit: - depth
Which one of the following statements is NOT true?? - Answer Exposure index describes
the quantity of exposure to the patient.
Deviation index describes the difference between
expressed in logarithmic
fashion. - Answer actual exposure; target exposure
How dark or light a digital image appears on a display monitor is described as: - Answer
brightness
The ability of a digital system to display the subtly different shades of gray is called:
-Answer contrast resolution
The ability of an imaging system to demonstrate small details of an object is known as:
-Answer Spacial Resolution
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