Two parallel opposed Co-60 Gamma Ray beams in Excel

Hayool
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Hi everyone,
I have this question about POP.

Assume a patient separation of 20cm. Using data for 6MV , FS 10x10 cm, plot the depth dose for one beam at 2 cm intervals. Include on your plot the dose at dmax and the dose at 20-dmax.
On the same graph repeat this for the opposed beam. Now plot the sum of the depth doses on the same graph.
Renormalize this POP distribution to 100% at midplane.
data are attached.

I tried to solve it in excel but the but i got the graph little bit different than what our teacher told us :nb)

Please help.

Thanks.
 

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Beam 2 has an odd shape.

Independent of that: Why does it start with 100% relative dose at 30 cm?
Hayool said:
Assume a patient separation of 20cm.
Where did you use this?
 
I did not use that i only used the the data in the table, did not know how to use the separation:frown:
 
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