Figure 1

A) The 19-parameter equation predicting Gradient-Induced Voltages (GIV) using the gradient waveforms. B) Block-diagram showing the workflow during the automated clean-up routine. A clean portion of the ECG is first acquired and used to calculate a clean ECG template. The program then waits for the trigger to start acquiring the GIV-corrupted ECG signals during the MR scan along with the gradient waveforms. The fitting routine then subtracts the ECG template to obtain the GIV, which are fitted to the equation yielding the coefficients for each channel. These are then used in the real-time ECG monitoring during the subsequent MR scan.