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Developing a 3DBolus Program in a Community Hospital Using Low Cost Printers

P Koistinen1*, M Koistinen2 , (1) Univerisity of Rhode Island, Kingston, RI, (2) Melrose-Wakefield Center for Rad Oncology,Stoneham, MA


(Sunday, 7/14/2019) 3:00 PM - 3:30 PM

Room: Exhibit Hall | Forum 4

Purpose: Three dimensional (3D) has been shown that it is suitable to print a precise a bolus for radiation therapy. The main purpose of the research was to determine if is feasible to develop a 3D program in a community based setting. We wanted to evaluate if a 3D bolus printed on an inexpensive desktop printer could match the bolus printed on a professional commercial printer as well as a standard bolus in clinical use.

Methods: Using PLA has the advantage of being able to be molded with with simial stopping power, it is inexpensive and readily available. Three different printers were used to test if an inexpensive desktop printer is capable of printing an accurate enough model to be used in the clinic. Two personal printers, a Mini-Multi-mate and a ROBO R1+ were compared to bolus printed on a MakerBot Replicator printer located in the University of Rhode Island Biomedical Engineering Department. The way that the effect was tested for this research was to use a Mosfet diode and an ion chamber to measure the dose of a 6MeV electron beam passing through a bolus 0.5 cm of superflab and 3D printed bolus printed with varying infill. The infill tested was 20%, 50%, and 75%.

Results: All 3 types of printers gave proportional results for the varying infill that were within 2% of each other. The discrepancy of the superflab bolus and the printed with the infill of 50% was within 1% measured dose.

Conclusion: A personal desktop printer can create 3D printed boluses equivalent to thoses printed on a professional printer. The print at 50% infill most closely resembles the results for standard clinical bolus. The bolus can be created on-site to provide complex bolus for patients in a community setting.


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