Three-dimensional printers applied for the production of beam blocks in total body irradiation treatment

Total body irradiation in extended source surface distance is a common treatment technique before hematopoietic stem cell transplant. The lungs are organs at risk, which often are treated with a lower dose than the whole body. This can be achieved by the application of blocks. 3D printers are a modern tool to be used in the production process of these blocks. We demonstrate the applicability of a specific printer and printing material, describe the process, and evaluate the accuracy of the product. The blocks and apertures were found to be applicable in clinical routine