DR systems
the two types of Digital Radiography systems
what is CR and DR?
made up pixels and voxels
what is matrix?
what are the 3 image processing
what is
point, local, and geometric processing?
LUT has what response to exposure
what is linear response?
increased noise makes
what is a low contrast image?
what Digital Radiography system has to be read by the reader to process the plate and create an image
what is computed radiography? (CR)
size of the detector/ overall dimension of image matrix
what is FOV?
when the computer corrects for incorrect technique
what is rescaling
image processing that allows for rotation and magnification
what is geometric processing operations?
what is detective quantum effieciency?
converts light to electric signal
what is a photodetector?
determines the shades of grey
what is bit depth?
the window level controls
what is brightness?
does not contribute to the image quality but it is undesirable
what is noise?
DQE and MTF relationship
what is directly proportional
signals from receptors in an analog format must be converted to digital language
what is ADC?
determines the bit depth
what is ADC?
the window width controls
what is contrast?
ambient and quantum mottle are under this category of undesirable to image quality
what is noise?
used to measure the capacity of the detector to pass its spatial resolution characteristics to the final image
what is MTF
detection and measurement of the intensity of the electronic signal coming from each pixel
what is sampling?
spatial resolution is increased with this also increasing in size
what is matrix size
this is applied to data to give the standard contrast
what is LUT?
a high SNR equals to
what is a low noise image?
higher DQE does what to the patient dose
what is lower patient dose