Free-breathing whole-heart 3D cine magnetic resonance imaging with prospective respiratory motion compensation.

ABSTRACT: PURPOSE:To develop and validate a new prospective respiratory motion compensation algorithm for free-breathing whole-heart 3D cine steady-state free precession (SSFP) imaging. METHODS:In a 3D cine SSFP sequence, 4 excitations per cardiac cycle are re-purposed to prospectively track heart position. Specifically, their 1D image is reconstructed and routed into the scanner's standard diaphragmatic navigator processing system. If all 4 signals are in end-expiration, cine image data from the entire cardiac cycle is accepted for image reconstruction. Prospective validation was carried out in patients (N?=?17) by comparing in each a conventional breath-hold 2D cine ventricular short-axis stack and a free-breathing whole-heart 3D cine data set. RESULTS:All 3D cine SSFP acquisitions were successful and the mean scan time was 5.9?±?2.7?min. Left and right ventricular end-diastolic, end-systolic, and stroke volumes by 3D cine SSFP were all larger than those from 2D cine SSFP. This bias was?

SUBMITTER: Moghari MH 

PROVIDER: S-EPMC5876089 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature