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Modelling and Analysis of the Effect of Angular Velocity and Acceleration on Brain Strain Field in Traumatic Brain Injury

Hoursan, Hesam | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44226 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Ahmadiyan, Mohammad Tagh; Zohoor, Hassan
  7. Abstract:
  8. Traumatic brain injury (TBI) has long been known as one of the most anonymous reasons for death around the world. A presentation of a model of what happens in the process has been under study for many years; and yet it remains a question due to physiological, geometrical and computational complications. Although the modeling facilities for soft tissue modeling have improved, the precise CT-imaging of human head has revealed novel details of brain, skull and the interface (the meninges), a comprehensive FEM model of which is still being studied. This study aims to present an optimized model of human head after a comprehensive study of the previous models; which includes the brain, skull, and the meninges between them. The model is then used to study the effects of various sudden velocity-acceleration impulses on the strain field of the brain by using FE method. Next, the results are summed up to reach a suitable model for the determination of damage threshold in the brain during trauma. To reach this aim, a full geometrical model of a 30-year-old patient's head has been generated from CT-scan and MR data. The model has been exposed to 20 angular velocity-acceleration pulses and the changes in the strain field have been compared with the previous studies yielding acceptable accordance with two major previous models. The results have also been studied in terms of the severity of strain in different lobes of the brain and the respective results have shown that certain criteria can be generated on the threshold of damage in the brain
  9. Keywords:
  10. Angular Velocity ; Finite Element Method ; Traumatic Brain Injury (TBI) ; Angular Acceleration ; Strain Field ; Meninges

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