Imaging technologies

Question 1

Types of medical imaging

Answer 1

X-ray
CT
PET
US
MRI

Question 2

Pixel

Answer 2

Picture element

Question 3

Image resolution

Answer 3

Number of pixels on each axis (a x b)

Question 4

Intensity resolution

Answer 4

Max intensity value range

Question 5

Spatial resolution

Answer 5

Measure of smallest discernible detail in an image

Question 6

Aspect ratio

Answer 6

Width:height

Question 7

Dynamic range

Answer 7

Range of intensity values used

Question 8

Types of compression

Answer 8

Uncompressed, compressed (lossy, lossless)

Question 9

Visualisation methods

Answer 9

Slice mode
Volume mode (MIP - max intensity projection, surface rendering, volume rendering)

Question 10

Lamber Beer’s law

Answer 10

I = initial I x e^-ux

u=linear attenuation coefficient, x = pathlength, I=intensity

Question 11

Types of ionising radiation

Answer 11

alpha particles (He2+)
beta particles
gamma particles
positrons
X-rays

Question 12

PET

Answer 12

Positron emission tomography

Question 13

SPECT

Answer 13

Single proton emission tomography

Question 14

MRI

Answer 14

Nuclear magnetic resonance, molecules align with magnetic field, when released they give off a radio signal which can be measured.