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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.

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To account for heterogeneities, the kernels are density-scaled during

superposition. Superposition is performed using “collapsed cones.”

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Deposit in water

No mention of medium in the manual, thus;

April 2017

25

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