smallest exposure change (signal) difference that can be captured by a detector controlled by the dynamic range of the detector and quantization
Contrast resolution (digital)
detectors convert the x-ray energy directly to an electric signal through an amorphous selenium detector
Direct conversion
image comprised of continuous shades of gray from black to white
Analog
the ability if an imaging system to resolve and render on the image a small high contrast object; determined primarily by the number of pixels in an image & therefore the size of each pixel
Spatial resolution (digital) –
the process of acquiring images of the body using x-rays displaying them digitally, viewing and storing them on a computer complete file
Digital imaging
the further adjusting of any image of a body part with the use of computer software
Post processing
the dimensions of the field of view (fov) with in patients body not the size of displayed image
Image size (digital)
determines the gray scale rendition of that tissue & therefore the image contrast
Window width – (contrast)
one of the two types of digital imaging systems that is cassette based, the body part is obtained using storage phosphor in the cassette
Computed radiography
a two-step process in which the x-ray energy is first converted to light & then converted into electrical signal using a scintillator
