Now playing · 02 Imaging
CT noise scaling
σ₂ = 16.97 HU
σ
2
σ
1
=
m
A
s
1
⋅
h
1
m
A
s
2
⋅
h
2
\frac{\sigma_2}{\sigma_1}=\sqrt{\frac{mAs_1\cdot h_1}{mAs_2\cdot h_2}}
σ
1
σ
2
=
m
A
s
2
⋅
h
2
m
A
s
1
⋅
h
1
Pixel noise scales as 1/√(mAs · slice · dose).
Laser