Radiographic Quality Flashcards
radiographic quality is divided into 2
Photographic Quality and Geometric Quality
pertains to the visibility of details in a radiograph
Photographic Quality
refers to the overall blackness or darkness of a radiograph
Density (optical density)
the image appears darker indicating more xray exposure
High Density
the image appears lighter indicating less xray exposure
Low Density
OD is actually a _____ which has 0=____ and 4=_____
logarithmic fuction
clear
black
is the difference in density between adjacent areas on a radiograph
Contrast
many shades of gray more gradually transitions
low contrast
few shades of gray dostinct black and white areas
High Contrast
useful for soft tissue imaging
Low Contrast
useful for bone imaging
High Contrast
also reffered to as spatial resolution is the sharpess or clarity of structure
Detail
is the misrepresentation of the size or shape of anatomical structure
Distortion
ensures that the anotomical structures ina. radiograph are displayed accurately without distortion or blurring
Geometric Quality
refers to the structural lines or borders of tissues in the image and the mount of blur in the image
Detail
controlled by geometric factors (focal spot size, SID, OID); also affected by motion
Detail
misrepresentation of object size and object shape can be minimized through ___ ___ anotomical part, and the image receptor
proper alignment
results from poor alignment of the image receptor or the xray tube
Elongation
results from poor alignment of the anatomical part
Foreshortening
