Dose Course 2018_Flipping book

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Pinnacle by Philips

❑ Primary transport for a beam is accomplished by projecting the incident energy fluence through the density representation of a patient to compute a TERMA (Total Energy Released per unit Mass) volume using poly-energetic rays, with water equivalent depth hardening and off-axis softening. o Transport in water ❑ A three-dimensional superposition of the TERMA with a poly-energetic energy deposition kernel is used to compute dose. A ray-tracing technique is used during the superposition to incorporate the effects of heterogeneities on lateral scatter. o To account for heterogeneities, the kernels are density-scaled during superposition. Superposition is performed using “collapsed cones.” o Deposit in water ❑ No mention of medium in the manual, thus;

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Dublin 2018