3D modeling of bolus for producing by prototyping and use in radiation therapy

Due to its vast number of occurrences, cancer has caused an economic impact on the public and supplementary health care sectors. It is estimated that more than 50% patients diagnosed with malignant neoplasms need radiotherapy at some stage their treatment, most them treated photon and/or electron beams. build-up effect (increase in dose matter from deposition surface a point maximum dose) by interaction beams irradiated tissue, bolus often used routine sectors superficialize treatment region. The human body complex surfaces are regions radiotherapy, but commercial standard shape length do not adapt perfectly these surfaces. When this happens, air gaps may appear region, causing differences between defined planning delivered during treatment. In order eliminate possible distribution errors, two methodologies for individualized construction were proposed. both cases, computed tomography images Alderson Rando male anthropomorphic phantom as reference anatomy body. From images, one model was constructed 3D modeling software 3ds Max creating polygonal mesh, while other image computing Slicer, using segmentation tools. Creality Slicer 1.2.3. prepared files printing. prints made polylactic acid filament Tevo Tarantula Pro printer. methodology showed better results, greater contact area observed when testing fit printed physical phantom. virtual will be available future computer simulations. could dosimetry linear accelerators.