Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2019, Vol. 30 ›› Issue (9): 142 doi: 10.1007/s41365-019-0667-2

• ACCELERATOR, RAY AND APPLICATIONS • Previous Articles     Next Articles

Radiotherapy customized head immobilization masks: from the modelling and analysis to 3D printing

Loja, M.A.R.1,2,3 Craveiro, D.S. 1 Vieira, L.1,4,5 Sousa, E.1,4 Rodrigues, J.A.1  Portal, R.J.F. 1,2   

  1. 1CIMOSM, Centro de Investiga??o em Modela??o e Optimiza??o de Sistemas Multifuncionais, ISEL, IPL, Instituto Superior de Engenharia de Lisboa, Av. Conselheiro Emídio Navarro 1, 1959-007 Lisboa, Portugal
    2LAETA, IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049- 001 Lisboa, Portugal
    3NOVA UNIDEMI, Department of Mechanical and Industrial Engineering, Faculty of Science and Technology, Universidade Nova de Lisboa, Caparica, Portugal
    4H&TRC – Health &Technology Research Center, ESTeSL - Escola Superior de Tecnologia da Saúde de Lisboa, Av. D. Jo?o II, Lote 4.69.01, 1990-096 Lisboa, Portugal
    5Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências da Universidade de Lisboa, Lisboa, Portugal
  • Received:2018-06-01 Revised:2019-05-07 Accepted:2019-05-14
  • Contact: M. A. R. Loja
  • Supported by:
    This work was supported by the Project IPL/2016/SoftImob/ISEL and Project LAETA—UID/EMS/50022/2019.
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Loja, M.A.R., Craveiro, D.S. , Vieira, L., Sousa, E., Rodrigues, J.A., Portal, R.J.F. . Radiotherapy customized head immobilization masks: from the modelling and analysis to 3D printing.Nuclear Science and Techniques, 2019, 30(9): 142     doi: 10.1007/s41365-019-0667-2

Abstract: Immobilization devices may be a valuable aid to ensure the improved effectiveness of radiotherapy treatments where constraining the movements of specific anatomical segments is crucial. This need is also present in other situations, specifically when the superposition of various medical images is required for fine identification and characterization of some pathologies. Because of their structural characteristics, existing head immobilization systems may be claustrophobic and very uncomfortable for patients, during both the modeling and usage stages. Because of this, it is important to minimize all the discomforts related to the mask to alleviate patients’ distress and to simultaneously guarantee and maximize the restraint effectiveness of the mask. In the present work, various head immobilization mask models are proposed based on geometrical information extracted from computerized tomography images and from 3D laser scanning point clouds. These models also consider the corresponding connection to a radiotherapy table, as this connection is easily altered to accommodate various manufacturers’ solutions. A set of materials used in the radiotherapy field is considered to allow the assessment of the stiffness and strength of the masks when submitted to typical loadings.

Key words: Computed tomography, 3D laser scanning, Geometric modeling, Head immobilization devices, Stiffness and strength analyses, 3D printing