Zion Tsz Ho Tse1, Charles L. Dumoulin2, Gari Clifford3, Michael Jerosch-Herold1, Daniel Kacher1, Raymond Kwong4, William Gregory Stevenson4, Ehud Jeruham Schmidt1
1Radiology, Brigham and Women's Hospital, Boston, MA, United States; 2University of Cincinnati College of Medicine, Cincinnati, OH, United States; 3Health Sciences and Technology, Massachusetts Institute of Technology, Boston, MA, United States; 4Cardiology, Brigham and Women's Hospital, Boston, MA, United States
An adaptive filtering procedure, based on a set of ECG measurements performed outside and inside the MRI, is presented in order to separate between the real ECG and Magneto-HydroDynamic (MHD) signals in 12-lead ECGs acquired within a 1.5T MRI. The cleaned ECG improves cardiac gating and preserves S-T segment fidelity for physiological monitoring. The integrated MHD magneto-hydrodynamic signals provide non-invasive beat-to-beat cardiac output estimations. The proposed method was validated in five normal healthy subjects, including an athlete exercising inside the magnet, and a patient with frequent Premature Ventricle Contractions.