Cristina_Masters

Balloon Catheter Sizing

Master Project Cristina Fiani - Supervisors: Dr. James Avery & Dr. Kirill Aristovich

Mesh with Python Gmsh

• Python gmsh (mesh generation) based on tutorial t10 https://gitlab.onelab.info/gmsh/gmsh/-/blob/master/tutorial/python/t10.py

• Models step files (modelled on Fusion 360) into vtu files (these are used with point electrodes) 9Fr, 14Fr, 16Fr - including fine and coarse models

• Mesh quality obtained with Joe-Liu metric (Download folder https://github.com/fangq/iso2mesh) - also used with NETGEN meshes

EIDORS http://eidors3d.sourceforge.net/

• Download Netgen and run startup.m
• Prepare models vtu and excel files needed in right directory
• Change paths in code accordingly

Analytical Approach

• Point electrodes:
  1. Get models vtu in right directory
  2. Run with 22 electrodes for 9FR, 34 electrodes for 14FR, 38 electrodes for 16FR (use corresponding protocol excel file)
• Surface electrodes Netgen:
  1. Run with 8 electrodes per ring pi (equivalent to 16 electrodes 2pi as only interested in 90-degree-sector); 4 electrodes per ring pi (equivalent to 8 electrodes 2pi); 2 electrodes per ring pi (use corresponding protocol excel file)
• Sensitivity analysis calculating Jacobian and observing on ParaView

EIT RECONSTRUCTIONS

• EIT_reconstructions_3D_abs_point:
  1. Use 8 electrodes per ring and protocol (stimulation pattern / measurement pattern) file: sp_mp1920.xlsx
  2. Change corresponding coarse and fine models files if reconstructing for 9FR, 14FR or 16FR
• Hyperparameter matrix (heuristic approach)
• Test Reconstruction Blob
• Additional protocols (560 measurements, 56 measurements)
• Trials folder with additional codes (e.g. slice reconstruction)
• Data Plots

EXPERIMENTAL WITH ARDUINO

• Two-electrode method
• Four-electrode method
• Test multiplexers