#Icycle pattern manual
#Icycle pattern full

Objectives have assigned priorities to steer the multicriterial planning towards favourable trade-offs between the various treatment goals. The Erasmus-iCycle solution is an a priori approach which enables the user to define a site specific set of criteria (wish-list) which may not be violated (constraints) or have to be met as well as possible, or better (objectives). However, both are a posteriori methods, i.e., the algorithm generates different sets of beam angles and intensity profiles from which the user selects the plan afterward.

#Icycle pattern full

, Craft and Monz presented a full multibeam space Pareto navigation tool.

Other solutions for multicriterial beam angle optimization have been proposed by Schreibmann et al. Д®rasmus-iCycle, developed at the Erasmus MC-Cancer Institute, is an optimizer for multicriterial beam profile optimization and beam angle selection for coplanar and non-coplanar IMRT.

#Icycle pattern manual

Automated planning of IMRT and VMAT may reduce the workload which is associated with manual вЂњtrial-and-errorвЂќ approaches by around 50%. On the other hand, generation of an optimal IMRT or VMAT plan is often time consuming and it has been shown that staff limitations are correlated with restricted use of new techniques such as IMRT even in the developed world. Highly conformal radiation techniques such as Stereotactic Body Radiation Therapy (SBRT), Intensity Modulated Radiation Therapy (IMRT) or VMAT are increasingly being used as their application becomes easier and dose distributions confer theoretical advantages, albeit so far without proof of superior clinical outcome. ConclusionsД®rasmus-iCycle plans showed better target coverage and sparing of OARs at the expense of minimally longer treatment times (for which no constraint was set).ДЇractionated or single-dose radiotherapy to spinal metastases of solid tumors is one of the most frequently performed radiation treatments. Treatment time was 7% longer in auto plans. One hotspot (>110% of D 50%) occurred in the spinal cord of one auto plan (33.2В Gy, D 50%: 30В Gy). Mean dose to OARs was lower in auto plans concerning both kidneys and the left lung. The Homogeneity Index did not differ significantly between the groups. When compared to manual plans, planning target volume (PTV) coverage of auto plans was significantly better. ResultsДЄll Erasmus-iCycle plans were clinically acceptable. Twenty-two patients received radiotherapy on kidney levels, 17 on lung levels, and 3 on both levels. Lungs and kidneys were defined as organs at risk (OARs). MethodsДЇorty-two targets in 32 patients were analyzed. We compared automatically created (auto) VMAT plans generated by Erasmus-iCycle to manually created VMAT plans for treatment of spinal metastases. Automated multicriterial treatment planning can eliminate this bottleneck. Planning for Volumetric Modulated Arc Therapy (VMAT) may be time consuming and its use is limited by available staff resources.