Int J Comput Assist Radiol Surg - Surgical stent planning: simulation parameter study for models based on DICOM standards.

Tópicos

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Resumo

RPOSE: Endovascular Aneurysm Repair (EVAR) can be facilitated by a realistic simulation model of stent-vessel-interaction. Therefore, numerical feasibility and integrability in the clinical environment was evaluated.METHODS: The finite element method was used to determine necessary simulation parameters for stent-vessel-interaction in EVAR. Input variables and result data of the simulation model were examined for their standardization using DICOM supplements.RESULTS: The study identified four essential parameters for the stent-vessel simulation: blood pressure, intima constitution, plaque occurrence and the material properties of vessel and plaque. Output quantities such as radial force of the stent and contact pressure between stent/vessel can help the surgeon to evaluate implant fixation and sealing. The model geometry can be saved with DICOM "Surface Segmentation" objects and the upcoming "Implant Templates" supplement. Simulation results can be stored using the "Structured Report".CONCLUSIONS: A standards-based general simulation model for optimizing stent-graft selection may be feasible. At present, there are limitations due to specification of individual vessel material parameters and for simulating the proximal fixation of stent-grafts with hooks. Simulation data with clinical relevance for documentation and presentation can be stored using existing or new DICOM extensions.

Resumo Limpo

rpose endovascular aneurysm repair evar can facilit realist simul model stentvesselinteract therefor numer feasibl integr clinic environ evaluatedmethod finit element method use determin necessari simul paramet stentvesselinteract evar input variabl result data simul model examin standard use dicom supplementsresult studi identifi four essenti paramet stentvessel simul blood pressur intima constitut plaqu occurr materi properti vessel plaqu output quantiti radial forc stent contact pressur stentvessel can help surgeon evalu implant fixat seal model geometri can save dicom surfac segment object upcom implant templat supplement simul result can store use structur reportconclus standardsbas general simul model optim stentgraft select may feasibl present limit due specif individu vessel materi paramet simul proxim fixat stentgraft hook simul data clinic relev document present can store use exist new dicom extens

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