Systems and methods for medical imaging of a heart and analysis of ECG target channel

A system for medical imaging, comprising:

• at least one storage device storing executable instructions, and at least one processor in communication with the at least one storage device, when executing the executable instructions, causing the system to perform operations including:
• obtaining a plurality of channels of electrocardiogram (EGG) signals of a heart of a subject, the plurality of channels of EGG signals includes a predetermined channel of EGG signal;
• switching the predetermined channel to a target channel when the predetermined channel of EGG signal is detected to be unavailable in a scan operation, wherein the switching the predetermined channel to a target channel when the predetermined channel of ECG signal is detected to be unavailable in a scan operation includes;
• identifying, from the plurality of channels of ECG signals, the target channel of ECG signal;
• switching the predetermined channel to the target channel when the predetermined channel of ECG signal is detected to be unavailable in a scan operation;
• wherein the identifying, from the plurality of channels of ECG signals, the target channel of EGG signal includes;
• performing a preprocessing operation on each of the plurality of channels of EG signals;
• and
• determining, from the plurality of channels of preprocessed EGG signals, the target channel of EGG signal;
• wherein an amplitude of a characteristic wave of the target channel of EGG signal is the maximum amplitude among amplitudes of corresponding characteristic waves of the plurality of channels of EGG signals—and causing, based on the switched channel of EGG signal, an imaging device to perform the scan operation on the heart of the subject.