Image Noise and Low Contrast Resolution
Image noise
CT number
CT number (2)
Image Noise
Image noise (2)
Measurement of noise
Measurement of noise (2)
Measurement of noise (3)
Image noise (3)
Noise and scanning parameters
Contributions to image noise
Image noise (4)
Measuring stochastic noise
Measurement of noise (4)
Slide 16
Slide 17
Slide 18
Measurement of noise: axial multi-slice
Measurement of noise in multi-slice
Measurement of noise in multi-slice (2)
Measurement of noise in multi-slice (3)
Image noise (5)
Image Noise (6)
Image noise: spiral single slice
Image noise: spiral multi-slice
Image noise (7)
Noise and tube current, scan time, slice width
Image noise and tube current
Image noise and slice thickness
Image noise and kV
Image noise vs kV
Noise and reconstruction filter
Noise and reconstruction filter (2)
Single slice spiral scanning: interpolation alg.
Single slice spiral scanning: pitch
Multi-slice (4 -10) slice spiral scanning
Multi-slice (4-10) spiral scanning: pitch
Multi-slice (4-10) spiral scanning: pitch (2)
Multi-slice (16 + ) Cone beam reconstruction
Multi-slice (16 + ) Cone beam reconstruction (2)
Low contrast detectability
Image contrast
Clinical importance of contrast in CT
Low contrast detectability and noise
Low contrast detectability and noise (2)
Low contrast detectability (2)
Effects on low contrast detectability
Percentage contrast
Low contrast detectability (LCD)
Phantoms for low contrast detectability (LCD)
Phantoms for low contrast detectability (LCD) (2)
Phantoms for low contrast detectability (LCD) (3)
Phantoms for low contrast detectability (LCD) (4)
Viewing conditions and window settings
Detectability criteria: when is a detail visible?
Statistical noise and structure
ImPACT LCD Analysis
Measurement of LCD
Manufacturers’ LCD performance data
Low contrast detectability (3)
Contrast detail curve
Contrast detail curve (2)
Contrast detail curve (3)
Contrast detail curve (4)
Understanding Imaging Performance (2): Image Noise and Low Contrast Detectability
Author: Sue Edyvean
E-mail: sue@impactscan.org
Homepage: http://www.impactscan.org/
ImPACT course presentation index: http://www.impactscan.org/impactcourseslides.htm