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Electric current density imaging of mice tumors
Magnetic Resonance in Medicine
|March 1, 1997
Summary
Electric current density imaging (CDI) maps electric currents in tumors. This method, applied in vivo and in vitro, can monitor electrochemotherapy effects based on electrode geometry.
Area of Science:
- Biomedical Engineering
- Medical Imaging
- Oncology
Background:
- Electrochemotherapy enhances cancer treatment using electric pulses.
- Accurate mapping of electric current distribution is crucial for optimizing treatment efficacy.
- Current methods for mapping electric currents in tumors are limited.
Purpose of the Study:
- To present and evaluate electric current density imaging (CDI) for mapping electric currents in tumors.
- To implement and test a CDI method in vivo and in vitro for tumor models.
- To assess the influence of electrode geometry on electric current distribution within tumors.
Main Methods:
- Implementation of a CDI technique previously validated with phantoms for in vivo and in vitro tumor models (mammary carcinomas, melanomas, sarcomas).
- Application of electric current pulses of approximately 2500 A/m2, relevant to electrochemotherapy.
- Evaluation of three electrode geometries: flat-flat, point-point, and point-flat.
Main Results:
- Successful mapping of spatial electric current distribution within different tumor types.
- Demonstration that electrode geometry significantly alters electric current distribution in tumors.
- Validation of the CDI method for in vivo and in vitro applications.
Conclusions:
- Electric current density imaging is a viable method for visualizing electric current flow in tumors.
- The findings indicate that CDI can be used to monitor the effects of electrochemotherapy.
- Electrode geometry plays a critical role in current distribution and can be optimized using CDI.
