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November 11, 2012

Oregon cancer institute uses Elekta Monaco software in cancer treatment

The Department of Radiation Medicine at Oregon Health & Science University's (OHSU) Knight Cancer Institute in Oregon, US, has become the first medical centre to use Elekta's Monaco software in the treatment of a cancer patient.

By admin-demo

The Department of Radiation Medicine at Oregon Health & Science University’s (OHSU) Knight Cancer Institute in Oregon, US, has become the first medical centre to use Elekta’s Monaco software in the treatment of a cancer patient.

The medical centre used Monaco software to create a Volumetric Modulated Arc Therapy (VMAT) treatment plan and subsequently deliver it on a Varian Trilogy treatment machine.

"Monaco uses the XVMC Monte Carlo dose engine, which is considered the gold standard for dose calculation."

Physicists produced Monaco test plans by means of prior treatment data from 15 patients before the integration of Monaco VMAT and Trilogy.

OHSU clinical associate professor and OHSU Knight Cancer Institute radiation medicine department chief physicist Dr Wolfram Laub said the Monaco test plans compared favourably to the clinical plans in certain crucial aspects.

"First, Monaco uses the XVMC Monte Carlo dose engine, which is considered the gold standard for dose calculation," Laub added.

"Comparing the Monaco plans to those produced by our usual planning system, I noticed higher volumes of normal tissues exposed to low radiation dose levels, which I attribute to the fact that Monte Carlo can more accurately account for photon scatter."

Monaco treatment plans tend to be less complex in terms of the shape of IMRT segments, facilitate higher QA passing rates on average and provide benefits due to the use of biological constraints.

The Monaco v.3.20 features the new Segment Shape Optimization tool, which allows improved dose conformity, plan quality and delivery efficiency, and is compatible with Varian’s ARIA oncology information system.

The workflow includes sending the CT simulation scan to an existing planning system for contouring. Later, the contours and CT scan are exported from the planning system into Monaco.

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