DICOM data-based liver tumor microwave ablation three-dimensional temperature field simulation method

Abstract

The invention discloses a DICOM data-based liver tumor microwave ablation three-dimensional temperature field simulation method, which comprises the following steps: step 1, reconstructing and repairing a tumor and blood vessel model based on DICOM data, introducing the model into a multi-physical field simulation module, selecting a working plane to draw an ablation needle structure chart, and constructing a simulation geometric model; step 2, setting different materials and parameters for a computational domain in the simulation geometric model, wherein the specific material types comprise liver, tumor and PTFE; step 3, constructing a coupling electromagnetic wave radiation model and a biological heat transfer model; step 4, dividing grids for the simulation geometric model according to the model constructed in the step 3 and a set microwave frequency, and setting a solver solving method; and 5, performing visualization processing on the simulation data obtained by solving to obtain temperature field distribution data. According to the simulation method, a three-dimensional finite element simulation model can be established by using preoperative image data of a patient, an ablation thermal field is calculated, and formulation of an operation scheme is guided.

Description

technical field [0001] The invention belongs to the field of finite element simulation, and in particular relates to a three-dimensional temperature field simulation method for liver tumor microwave ablation based on DICOM data. Background technique [0002] Liver tumor is a common abdominal malignant tumor. Microwave ablation, as an effective treatment method for this tumor, has been included in the NCCN (National Comprehensive Cancer Network) treatment guidelines. The preoperative planning involves the setting of ablation thermal dose (ablation power, ablation time) and planning of ablation needle puncture path. This two-point plan relies on the volumetric experimental data of the ex vivo ablation model and the experience of clinicians in puncturing ablation needles, and lacks precise surgical plans for different patients and guidance for clinicians with less puncture experience. [0003] Most of the existing simulation methods for microwave ablation of liver tumors are b...

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This two-point plan depends on the volumetric experimental data of the ex vivo ablation model and the experience of clinicians in punctu

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