Which term best describes a basic picture element on a display?
Give this one a try later!
Pixel
All of the following statements are true except:
Give this one a try later!
Dead pixels at the edge of the detector are easily identified
Which is the most interactive part of a PACS?
,Give this one a try later!
Display workstation
To collect charge on silicon chips the voltage sign is changed on electrodes within
each del moving electrons by rows down columns until readout row is reached. This is
referred to as:
Give this one a try later!
Bucket brigade scheme
Exposure indicator numbers uses the measurement
Give this one a try later!
Indicated Equivalent Air Kerma (KIND)
Adding tube filtration leads to an increase or decrease in the AVERAGE ENERGY of
the PRIMARY beam reaching the patient?
Give this one a try later!
increase (direct relationship)
,When the radiographer has the opportunity to set the back-up time, it should be
approximately _____________ of the expected exposure time
Give this one a try later!
150%
As the patient thickness increases, the amount of scatter radiation will always ____________.
When scatter radiation increases, contrast will always _______________.
Give this one a try later!
increase; decrease
Lack of subject contrast makes an object appear __________ on a radiographic image.
Give this one a try later!
homogenous
Match the key term with the definition.
Give this one a try later!
, *Automatic rescaling: Compensates for too little or too great of an
exposure when the exposure is greater or less than what was needed to
produce the image
*Histogram: A graphical representation of the exposure values collected
from the IR
*Flat-fielding: A type of software that corrects the nonuniformity of pixel
values throughout the entire image
*Sampling frequency: Determines how often the analog signal is
reproduced in its discrete digitized form
Most QA activities produce ______ data.
Give this one a try later!
quantitative
Subject contrast refers to the various body tissue densities and thicknesses, which
results in differential absorption of the x-ray beam and _________________ within the remnant
beam.
Give this one a try later!
signal differences
If image quality is improved with a larger matrix size and a smaller number of pixels,
why aren't all images processed with the maximum number of smaller pixels?
Give this one a try later!
Give this one a try later!
Pixel
All of the following statements are true except:
Give this one a try later!
Dead pixels at the edge of the detector are easily identified
Which is the most interactive part of a PACS?
,Give this one a try later!
Display workstation
To collect charge on silicon chips the voltage sign is changed on electrodes within
each del moving electrons by rows down columns until readout row is reached. This is
referred to as:
Give this one a try later!
Bucket brigade scheme
Exposure indicator numbers uses the measurement
Give this one a try later!
Indicated Equivalent Air Kerma (KIND)
Adding tube filtration leads to an increase or decrease in the AVERAGE ENERGY of
the PRIMARY beam reaching the patient?
Give this one a try later!
increase (direct relationship)
,When the radiographer has the opportunity to set the back-up time, it should be
approximately _____________ of the expected exposure time
Give this one a try later!
150%
As the patient thickness increases, the amount of scatter radiation will always ____________.
When scatter radiation increases, contrast will always _______________.
Give this one a try later!
increase; decrease
Lack of subject contrast makes an object appear __________ on a radiographic image.
Give this one a try later!
homogenous
Match the key term with the definition.
Give this one a try later!
, *Automatic rescaling: Compensates for too little or too great of an
exposure when the exposure is greater or less than what was needed to
produce the image
*Histogram: A graphical representation of the exposure values collected
from the IR
*Flat-fielding: A type of software that corrects the nonuniformity of pixel
values throughout the entire image
*Sampling frequency: Determines how often the analog signal is
reproduced in its discrete digitized form
Most QA activities produce ______ data.
Give this one a try later!
quantitative
Subject contrast refers to the various body tissue densities and thicknesses, which
results in differential absorption of the x-ray beam and _________________ within the remnant
beam.
Give this one a try later!
signal differences
If image quality is improved with a larger matrix size and a smaller number of pixels,
why aren't all images processed with the maximum number of smaller pixels?
Give this one a try later!
