Self-gated ATR-SSFP provided similar quantitative blood-myocardial border sharpness (0.61 vs 0.61 mm-1) compared to ECG-gated ATR-SSFP, enabling fat-suppressed cardiac cine imaging without ECG gating.
Does a self-gated ATR-SSFP sequence provide comparable image quality to ECG-gated sequences for fat-suppressed cardiac cine MRI in volunteers and patients?
Self-gated ATR-SSFP enables fat-suppressed cardiac cine imaging without the need for ECG gating, maintaining comparable image quality to conventional ECG-gated methods.
Absolute Event Rate: 0.61% vs 0.61%
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 ( 0.61±0.15 mm -1), ECG-gated ATR-SSFP ( 0.61±0.15 mm -1), or conventional ECG-gated balanced steady-state free precession cine MRI ( 0.59±0.15 mm -1). CONCLUSION: The proposed self-gated ATR-SSFP sequence enables fat-suppressed cardiac cine imaging at 1.5 T without the need for ECG gating and without decreasing the imaging efficiency of ATR-SSFP.
Ingle et al. (Wed,) reported a other. Self-gated ATR-SSFP vs. ECG-gated ATR-SSFP was evaluated on Quantitative blood-myocardial border sharpness. Self-gated ATR-SSFP provided similar quantitative blood-myocardial border sharpness (0.61 vs 0.61 mm-1) compared to ECG-gated ATR-SSFP, enabling fat-suppressed cardiac cine imaging without ECG gating.
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