(Sunday, 7/29/2018) 3:00 PM - 6:00 PM
Room: Exhibit Hall
Purpose: Clinical assessment of Pinnacle’s Scorecard for SBRT lung plan evaluations
Methods: The evaluation of a SBRT-lung plan can be a labor intensive and time consuming task. Significant benefit in efficiency results through quantitative tools available for plan evaluation, target dose coverage, and critical structure sparing. Ten lung SBRT plans with varying dose and fractionation were reviewed. Plan evaluations were carried out with an in-house spreadsheet, SNC’s PlanIQ, and Pinnacle’s Scorecard. Plans were created on Pinnacle3 v9.10 using Collapsed-Cone Convolution and 2x2x2 mm grid resolution. Each of the evaluation tools were used to verify target coverage was met and doses to critical structures fell below expected tolerances.
Results: Of the three evaluation tools investigated, all can assess 3, 4, and 5-fractionated SBRT plans. The spreadsheet, while providing a thorough analysis of coverage and dose to critical structures, target dose heterogeneity, and high and low dose spillage, is a time intensive process requiring the gathering and manual entry of values from the treatment planning system’s DVH and tabular table. PlanIQ assesses the same objectives but through automatic retrieval of data, thus eliminating opportunity for human error. The exporting of the image set, RTdose, and RTstructures however is still a lengthy process. Pinnacle’s Scorecard is embedded within the planning system, allowing for immediate assessment of minimal information such as target dose coverage and achievement in dose tolerances to critical structures.
Conclusion: With Pinnacle’s Scorecard, assessment of target coverage and doses to critical structures for a treatment plan can be quickly obtained. Additional time and effort, however, are needed to evaluate other criteria such as target dose heterogeneity, high dose spillage and low dose spillage.
Keywords
Taxonomy
TH- External beam- photons: extracranial stereotactic/SBRT
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