EP-1778: On the feasibility of performing a 3D-scan with your own smartphone
Jaime Perez-Alija, P. Gallego Franco, Eva Ambroa, S. Olivares, S. Loscos, Angélica Brayane de Oliveira Pedro · Radiotherapy and Oncology · 2016
The largest magnitude of Σ and σ for H&N was 1.94 mm, SNC was 1.56 mm, breast was 1.87 mm, thorax was 3.33 mm, pelvis was 3.75 mm and prostate was 2.89 mm.The PTV margins required are <4.5 mm for brain and H&N lesions, <5.5 mm for breast cancers, but range from 4.5 to 9 mm for thorax, prostate and pelvis lesions.Theses values indicate the setup variations of each patient.The variations were smaller for the breast, SNC and H&N cohorts than the prostate, pelvis and thorax cohorts.The pelvis and breast cohorts showed the greatest variation in lateral direction and the prostate cohorts in vertical direction.The largest variation were presented in thorax cohorts in longitudinal direction and the lowest were in the SNC cohorts. Conclusion:As the setup errors vary according to each immobilization systems, the analysis of each institution`s specific setup errors is essential for determining the PTV margins.The results were also used to define action level for online correction. EP-1777 MRT investigation of prostate and lymph nodes movements: implications on planning target volume?U. Björeland