Contrast Resolution - Pixels/Matrix Flashcards
what is contrast resolution?
the smallest exposure change or signal difference that can be detected on the IR
what 2 things is contrast resolution controlled by?
dynamic range bit depth (quantization)
what is dynamic range?
the range of exposures that may be captured by a detector
does digital or film have a wider dynamic range?
digital
what is bit depth (quantization)?
the # of bits per pixel
does digital or film have better contrast resolution?
digital
what is a pixel?
the picture element
what is a matrix?
rows and columns of pixels that make up a digital image
what is pixel pitch?
length from center of one pixel to the center of an adjacent pixel
does a larger matrix have larger or smaller pixels?
smaller
what is FOV (field of view)?
the portion of the imaging plate that contains relevant anatomic information and is displayed at the monitor screen?
will a smaller FOV have more or less pixels than a larger FOV?
more
