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.
Keywords