Dose 2016

Lateral variation of beam quality

1

2

3

d

= d rad

d rad

rad

00181 .0

00202 .0 ,

0000942 .0 ,

−

−

−

=

−=

1

2

3

or the inverse

56

,

, 4. 185 =

7. 185

a cm a −=

cm a cm

=

1

2

3

20

TMR

Tailor et al (1998) Med Phys 25 , 662-7.

10