ESSFN Small field dosimetry and its clinical implications

[@sumeerofficial5692]

Thanks for wonderful presentation.. a quick question where we can find the true value small output factor.. any published data for monte Carlo calculated values..

[@Gamma_Knife]

What we want are values that are confirmed by both Monte Carlo and physical measurements. For a platform like the Gamma Knife that's relatively easy, and factors are established, but for platforms that have an adjustable collimator the values may vary slightly from machine to machine. That's why it's important for each centre to measure their own values with an appropriate detector.

[@sumeerofficial5692]

@@Gamma_Knife yes, I agree on your point.. more specific to my question, if a linac having HDMLC , output factor measurements with diode or small volume chamber below FS 2x2 how can make sure that values are close to true data?

[@Gamma_Knife]

@@sumeerofficial5692 Using an appropriate chamber and the Alfonso formalism where necessary should get you a very accurate measurement. There are output factors published (eg. the papers by Tanny) that you can use to compare your data with, to increase your confidence.

[@sumeerofficial5692]

@@Gamma_Knife if I am not bothering you, may i get your email contact..

[@Gamma_Knife]

@@sumeerofficial5692 Sure. [e-mail]