Z intensity-weighted position self-respiratory gating method for free-breathing 3D cardiac CINE imaging |
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Authors: | Spincemaille Pascal Liu Jing Nguyen Thanh Prince Martin R Wang Yi |
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Institution: | Department of Radiology, Weill Medical College of Cornell University, 416 East 55th Street, New York, NY 10022, USA |
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Abstract: | A free-breathing 3D cine steady-state free precession (SSFP) technique was developed using the z intensity-weighted position (ZIP) which is the center of mass of a projection along the slice direction as a respiratory gating signal. The ZIP signal was continuously acquired using a slice encoded k-space center sampling in every TR. The performance of this gating method was compared with a method using the k-space center signal (KC) and with conventional 2D breath-hold cine SSFP in healthy subjects by measuring image quality and left ventricular function. The preliminary data obtained here demonstrated that the ZIP gating method provided superior respiratory motion artifact suppression when compared to the KC gating and provided left ventricular ejection fractions, and end-diastolic and end-systolic volumes similar to those obtained with the breath-hold 2D cine SSFP acquisition. |
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Keywords: | 3D cardiac CINE imaging Center of mass Respiratory self-gating Motion artifact suppression |
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