Preliminaries Flashcards
1
Q
Reduction / transfer of energy to tissue as it passes through it
A
Attenuation
2
Q
2 forms of attenuation
A
Absorption
Scattering
3
Q
Major limitations of radiography
A
- Superimposition of anatomical structures
- Is qualitative rather than qualitative
(can not discriminate between structure so it cannot quantify the thickness / composition of body types
4
Q
Difference in density or between neighboring regions
A
Contrast
5
Q
Degree of blackening
A
Density
6
Q
Ability to distinguish adjacent similar structures because of varying densities
A
Contrast resolution
7
Q
Degree of sharpness
A
Spatial resolution
8
Q
Goals of ct
A
- Eliminate /minimize superimposition
- Improve image contrast
- Recording of very small differences on tissue contrast
