Medical Image Processing
1.1. MEDICAL IMAGE PROCESSING/
ANALYSIS?
- Different medical imaging modalities provide
specified information of body’s organs or tissue
structures
- Contrast and visibility of medical image depend on
imaging modality, on response function as well as
pathological regions
Example:
- Examine fractures at rib cage → need to clearly
observe hard, bone structure → X-ray radiography
- Examine whether there is a sign of breast cancer or
not → clearly observe calcification, abnormal
masses and soft, breast tissue → breast X-ray
radiography or mammography
Medical image processing
1.2. MEDICAL IMAGING MODALITIES
- Objective of medical imaging: capture useful
information on physiological processes or body’s
organs by energy sources
- Catergorization
• Inside energy source
• Outside energy source
• Combination of inside and outside energy
sources
10-10
Radio
Waves
TV
Waves
Radar
Waves
Microwaves
Infrared
Rays
Visible
Light
Ultraviolet
Rays
X-rays
Gamma
Rays
102
101
1
10-1
10-2
10-3
10-4
10-6
10-7
10-8
Wavelength in meters
Frequency in Hz
10-5
10-9
10-10
10-11
10-12
10-13
10-14
103
106
107
109
1010
1011
1012
1014
1015
1016
1013
1017
1018
1019
1020
1021
1022
105
108
Energy in eV
10-9
10-8
10-6
10-5
10-4
10-3
10-1
1
101
10-2
102
103
104
105
106
107
10-7
MRI
X-ray
Imaging
Gamma-ray
Imaging
Cosmic
Rays
Energy sources
