1072 / 1245
D
i,j
patient: How does the algorithm
work?
d
reconst
D
EPID
i,j
D
i,j
(d
reconst
) = Pr
ij
(d
reconst
)+ Sc
ij
(d
reconst
)
Primary Dose
Scatter Dose
reconst
ij
EPID
reconst
EPID
ij
reconst
ij
d AC
d
d
d
2
Pr )
(Pr
Attenuation
primary
ij
radiol
ij
primary
reconst
ij
T
d
T
d
AC
)
(
Experimental value:
Ratio between EPID doses with and without the patient
Uses external contours (d) to distribute the attenuation
Within the patient, gives the reconstruction-plane dependent
Attenuation correction