A Novel 3D Camera-Based ECG-Imaging System for Electrode Position Discovery and Heart-Torso Registration.

Area of Science:

• Biomedical Engineering
• Medical Imaging
• Computational Cardiology

Background:

• Electrocardiography-imaging (ECG-imaging) is a promising non-invasive technology for cardiac electrical activity assessment.
• Standard ECG-imaging requires patient-specific thorax geometry, often obtained via computed tomography, which is outside the standard clinical workflow.
• Existing 3D camera-based methods for ECG-imaging often neglect the crucial registration between camera-derived torso models and individual heart geometry.

Purpose of the Study:

• To develop and evaluate a novel system for ECG-imaging that utilizes 3D cameras to generate patient-specific torso geometry.
• To address the gap in registering camera-derived torso models with pre-existing cardiac scan-derived heart geometry.
• To improve the clinical adoption of ECG-imaging by integrating a camera-based workflow.

Main Methods:

• Generation of patient-specific torso geometry using a 3D camera.
• Registration of the camera-derived torso model to heart geometry from prior cardiac scans.
• Optimal deformation of the torso model to match the patient's skin surface.
• Evaluation of electrode localization accuracy and ECG-imaging solutions against computed tomography-based methods in five patients with scar-related ventricular tachycardia.

Main Results:

• The camera-based ECG-imaging system demonstrated accurate surface electrode localization.
• ECG-imaging solutions derived from the camera-based system were comparable to those from computed tomography-based methods.
• The use of a patient-specific heart-thorax model derived from camera data improved results compared to a generic model.
• Successful registration between camera-based torso models and cardiac scans was highlighted as critical.

Conclusions:

• A novel 3D camera-based system can generate accurate patient-specific torso geometry for ECG-imaging.
• This approach overcomes the barrier of thorax imaging outside the standard clinical workflow.
• The system facilitates improved accuracy in cardiac electrical activity mapping and management of heart rhythm disorders.
• Registration of camera-derived torso models with cardiac scans is essential for effective ECG-imaging.