Jeffrey A. Feinstein, MD, MPH

Publication Details

  • Using cardiac phase to order reconstruction [CAPTOR]: A method to improve diastolic images JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING Feinstein, J. A., Epstein, F. H., Arai, A. E., Foo, T. K., Hartley, M. R., Balaban, R. S., Wolff, S. D. 1997; 7 (5): 794-798


    A method is proposed to reconstruct multiphase images that accurately depicts the entire cardiac cycle. A segmented, gradient-recalled-echo sequence (FASTCARD) was modified to acquire data continuously. Images were reconstructed retrospectively by selecting views from each heartbeat based on cardiac phase rather than the time elapsed from the QRS complex. Cardiac phase was calculated using a model that compensates for beat-to-beat heart rate changes. Images collected using cardiac phase to order reconstruction (CAPTOR) depict the entire cardiac cycle and lack the temporal gap that is characteristic of prospectively reconstructed sequences. Time-volume curves of the left ventricle capture the contribution of atrial contraction to end-diastolic volume (EDV). Transmitral phase-contrast flow measurements show a second peak inflow (alpha wave) that is absent in the standard sequence. Because atrial contraction contributes to ventricular EDV, images using CAPTOR potentially may provide a more reliable measure of EDV, stroke volume, and ejection fraction than standard techniques.

    View details for Web of Science ID A1997XW88300004

    View details for PubMedID 9307903

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