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Design of multi-modal vertebral phantom based on tissue equivalence and 3D printing technology
Author(s): 
Pages: 924-929
Year: Issue:  9
Journal: Chinese Journal of Medical Physics

Keyword:  vertebral fracturethree-dimensional reconstructiontissue equivalentthree-dimensional printingdigital radiographyphantom;
Abstract: Objective To design a multi- model vertebral fracture simulation phantom based on medical image modeling,tissue equivalence and three- dimensional(3D) printing technology. Methods The lumbar vertebral CT image sequence of the human lumbar vertebral image sample of a healthy person was obtained. The original DICOM image was imported into Mimics interactive medical image control system software to reconstruct the 3D models of vertebra, kidney and soft tissue.Vertebrae spondylolysis fracture models of " Ⅰ " type slot and "Y" type slot were constructed in the reconstructed model.The vertebral fracture model of equivalent X- ray absorption density was printed by 3D printing and tissue equivalence technologies. The CT and digital radiography(DR) multi-modal imaging were applied to evaluate the CT values of model,and to verify the simulation degree of phantom. Results The images of vertebral fracture phantom were clear under CT and DR, and the X-ray absorption coefficient of the tissue was equivalent to that of the real human tissue. Conclusion The multimodal vertebral fracture phantom based on 3D printing technology can be obtained in CT and DR, and can be used for finite element biomechanical analysis. The phantom can be constructed quickly with less cost. The tissue equivalence parameters of phantom are in the range of normal human parameters. The phantom can efficiently simulate three different types of vertebral spondylolysis fracture and other abdominal diseases.
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