492 / 1359
T Nyholm, et al (2006)
Radiother Oncol 78
, 347-51.
20/10
D(10 10,
20cm)
TPR
D(10 10,
10cm)
z
z
=
=
=
Isocenter
distance
10 cm
10 cm
10 cm
A further parameterization of , using the beam quality index
TPR2010 as single input parameter:
pencil kernel parameterization:
(
)
(
)
(
)
(
)
5
2
2
2
1
2
5
3
4
,
20/10
1
5
2
2
2
1
2
5
3
4
,
20/10
1
1
2
1 exp
exp
TPR
1 exp
exp
TPR
m
m
i
z
m
i A
i
z
i
z
m
i B
i
z
z
A
A
A z A
A z
A z
A C
a
B
B
B z B
B z B z
B C
b
a a a z
=
=
= −
+
+
=
=
−
+
+
=
= +
(
)
(
)
5
,
20/10
1
5
2
2
2
1
2
5
3
4
,
20/10
1
TPR
1 exp
exp
TPR
m
m
i
m
i a
i
i
z
m
i b
i
a
C
b b
b
z b
b z b z
b
C
=
=
=
= −
+
+
=
( )
e
e
z
z
a r
b r
z
z
A
B
p
r
r
−
−
+
=
This is the PK kernel parameterization used in e.g. Scandidos Delta4 software