IP
what is:
the ability of the system to record adjacent small structures. the sharpness of the structural edges recorded in the image.
spatial resolution
as pixel size increases, spatial resolution_______?
decreases.
what determines pixel density?
pixel size and pixel pitch
what is the DEL fill factor?
ratio of a pixels sensitive area versus a pixels total area. 50/50 or 80/20
increasing the IR size results in an _______?
increased matrix size
how is spatial resolution measured?
lp/mm (line pairs per millimeter)
what is pixel pitch?
distance from one pixel to an adjacent pixel, measured from center to center
what type of radiography used a detector element (DEL)?
Direct capture radiography (DR)
what is a matrix?
two-dimensional array of pixels ( x and y)
what happens when pixel size decreases?
increased matrix size and increased spatial resolution
what is a pixel?
smallest area depicted on an image
as pixel pitch increases, spatial resolution_______?
decreases
what type of IR/detector is used in DR?
flat panel detector
what is matrix size?
total number of pixels
what does decreasing pixel size do to image quality?
improves visibility of small structures and increases spatial resolution
what type of shape is a pixel?
2D square containing gray shade
what is pixel density?
number of pixels per millimeter
what determines spatial resolution in DR?
detector element size
Matrix size is dependent upon _______ and _______?
1. FOV (field of view)
2. pixel density
is spatial resolution related to exposure amount?
no
how do you determine the size of a pixel?
measure it from end to end
what happens to pixel density when pixel size decreases?
pixel density increases (more pixels)
as the DEL size increases, spatial resolution _______?
decreases
what size matrix is preferred in DR?
the largest number matrix size
what is:
the number of pixels sampled per millimeter as the laser scans each line of the imaging plate.
sampling frequency