Accurate localization of the ECG electrodes on the surface of a patient is very important for inverse ECG methods, especially when the 12 lead ECG is used.
To localize the electrodes accurately on magnetic resonance imaging (MRI) or computed tomography (CT) markers can be used, but this automatically requires a costly MRI scan. Moreover, multiple ECG recordings require multiple MRI scans. A 3D photo, registered to the MRI or CT data supports the localization of the ECG electrodes.
A marker at the top of the sternum is used to facilitate and guide the registration process. We expect that automatic registration of a 3D photo to the MRI derived model exceeds manual registration.