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- Title
Self-gated fat-suppressed cardiac cine MRI.
- Authors
Ingle, R. Reeve; Santos, Juan M.; Overall, William R.; McConnell, Michael V.; Hu, Bob S.; Nishimura, Dwight G.
- Abstract
Purpose To develop a self-gated alternating repetition time balanced steady-state free precession (ATR-SSFP) pulse sequence for fat-suppressed cardiac cine imaging. Methods Cardiac gating is computed retrospectively using acquired magnetic resonance self-gating data, enabling cine imaging without the need for electrocardiogram (ECG) gating. Modification of the slice-select rephasing gradients of an ATR-SSFP sequence enables the acquisition of a one-dimensional self-gating readout during the unused short repetition time (TR). Self-gating readouts are acquired during every TR of segmented, breath-held cardiac scans. A template-matching algorithm is designed to compute cardiac trigger points from the self-gating signals, and these trigger points are used for retrospective cine reconstruction. The proposed approach is compared with ECG-gated ATR-SSFP and balanced steady-state free precession in 10 volunteers and five patients. Results The difference of ECG and self-gating trigger times has a variability of 13 ± 11 ms (mean ± SD). Qualitative reviewer scoring and ranking indicate no statistically significant differences ( P > 0.05) between self-gated and ECG-gated ATR-SSFP images. Quantitative blood-myocardial border sharpness is not significantly different among self-gated ATR-SSFP (
- Publication
Magnetic Resonance in Medicine, 2015, Vol 73, Issue 5, p1764
- ISSN
0740-3194
- Publication type
Article
- DOI
10.1002/mrm.25291