wk 1.1 Flashcards
1
Q
what is medical imaging
A
branch of medicine that uses imaging devices and techniques
2
Q
what can i obtain from medical imaging
A
obtain internal anatomic images which provide biochemical and physiological analysis of tissues and organs
3
Q
is medical imaging invasive
A
no, not invasive
4
Q
benefits of medical imaging
A
- assists diagnosis/treatment of different medical conditions
- reveals internal structures of body without surgically opening it up
- helps the study of neurology and human behaviours
5
Q
what is radiography (x-ray)
A
- electromagnetic radiation of higher freq. than visible light
- travels in a wave like pattern at the speed of light
6
Q
how are x-ray pictures depicted and why
A
- calcium in bones -> absorbs more, shows up white in x-rays
- soft tissues -> absorbs fewer rays
- full of air (lungs) -> absorbs no rays, shows up as black
7
Q
radiation dangers (ionising)
A
- damages cells to some extent
- depends on quality and quantity of exposure
- harmful effects are cumulative
8
Q
how to reduce exposure (ionising)
A
- distance, inversely proportional to square distance of the source
- shield, lead(Pb) aprons/ ceiling mounted
- reduce time
9
Q
radiation detectors
A
- Detect- determine if radiation is present
- Identify - what isotopes are generating radiation
- Quantify - amount of radiation present
10
Q
whats CT stand for
A
COMPUTED TOMOGRAPHY
11
Q
whats CT
A
Medical imaging technique that generates cross-sectional images in the axial planes.
12
Q
how are the CTs displayed/developed
A
- display of the anatomy of a thin slices of a body
- developed from multiple X-ray absorption measurements made around the body’s
periphery
13
Q
uses of CT
A
- muscle and bone disorders, such as tumors and fractures
- diseases such as cancer or heart disease
- tumors, infections, or blood clots
- internal injuries
