Imaging technologies Flashcards
1
Q
Types of medical imaging
A
X-ray CT PET US MRI
2
Q
Pixel
A
Picture element
3
Q
Image resolution
A
Number of pixels on each axis (a x b)
4
Q
Intensity resolution
A
Max intensity value range
5
Q
Spatial resolution
A
Measure of smallest discernible detail in an image
6
Q
Aspect ratio
A
Width:height
7
Q
Dynamic range
A
Range of intensity values used
8
Q
Types of compression
A
Uncompressed, compressed (lossy, lossless)
9
Q
Visualisation methods
A
Slice mode Volume mode (MIP - max intensity projection, surface rendering, volume rendering)
10
Q
Lamber Beer’s law
A
I = initial I x e^-ux
u=linear attenuation coefficient, x = pathlength, I=intensity
11
Q
Types of ionising radiation
A
alpha particles (He2+) beta particles gamma particles positrons X-rays
12
Q
PET
A
Positron emission tomography
13
Q
SPECT
A
Single proton emission tomography
14
Q
MRI
A
Nuclear magnetic resonance, molecules align with magnetic field, when released they give off a radio signal which can be measured.
