Radiology Flashcards
1
Q
T1 vs T2
A
- T1 - fat is white
- T2 - fat + water both white
2
Q
4 different types of MRi imaging?
A
- T1
- T2
- fat saturated images
3
Q
what is MRi imaging better for?
A
- soft tissue
4
Q
how do MRi’s work?
A
- human 70% water
- H atoms altered using powerful magnets & radio frequencies
5
Q
what type of images do MRis produce?
A
- tomographic images
6
Q
what do MRi’s use instead of ionising radiation?
A
- magnetic
- radio wave frequency
7
Q
MRi meaning?
A
- magnetic resonance imaging
8
Q
what positions can patients be in for a CT scan
A
- supine
- prone
9
Q
what do CTs produce?
A
- tomogram
10
Q
how do CT scans work?
A
- x rays project onto the detector
- numerical value sent to computer based upon tissue radiodensity
- converts radiodensities to shades of grey
11
Q
CT meaning
A
- computed tonography
12
Q
what is a fluoroscopy?
A
- contrast agents (barium, iodine) are radio-opaque
- allows radiologists to see vessels and GI tract more easily
13
Q
what positions can xrays be taken in?
A
- supine or erect
- AP or PA
14
Q
what are xrays?
A
- penetrating form of electromagnetic radiation with high energy
15
Q
what are xrays composed of?
A
- overlapping radiodensities
