IMRT 2018

Penumbra

• Measurement of penumbra requires a small measurement volume. Ionisation chambers broadens the penumbra

Penumbra

MC

Pappas, MedPhys35, 2008. Small SRS photon field profile dosimetry performed using a PinPoint air ion chamber, a diamond detector, a novel silicon-diode array (DOSI), and polymer gel dosimetry. Analysis and intercomparison.

Haryanto PMB47, 2002. Investigation of photon beam output factors for conformal radiation therapy—Monte Carlo simulations and measurements