Comparison of breath hold and free breathing respiratory triggered retrospectively cardiac gated cine steady-state free precession (RT-SSFP) imaging in adults
نویسندگان
چکیده
Background The cine steady-state free-precession (SSFP) is the standard sequence for left ventricular (LV) function evaluation. However, SSFP mandates uninterrupted RF excitations to maintain steady-state (SS) during suspended respiration. In patients who cannot perform breath-holds (BH), a respiratory triggered (RT) free breathing (FB) retrospectively cardiac gated cine SSFP sequence that drives the magnetization to SS before commencing cine acquisition may be an alternative [1]. In this work, we validate the RT FB SSFP sequence by comparing it to the BH SSFP sequence for LV function evaluation.
منابع مشابه
Two-center clinical validation of free breathing respiratory triggered retrospectively cardiac gated steady-state free precession (RT-SSFP) cine imaging in adults
Background Notwithstanding all the advantages of the cine bSSFP there are certain limitations, especially in sedated patients, patients with impaired breath-holding capacity, and those with cardiac arrhythmias. Any respiratory motion due to unsteady breath-hold during data acquisition causes motion artifacts, sacrificing endocardial border definition. In this study we clinically validate a RT-S...
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Background Cine steady-state free precession (SSFP) is the preferred sequence for ventricular function evaluation. However, SSFP demands uninterrupted RF excitation to maintain steady-state (SS) during suspended respiration. This is feasible in adults who can perform breath-holding (BH), but is difficult to accomplish in sedated or uncooperative children. To overcome this, many pediatric groups...
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Background The SSFP sequence must attain and maintain the magnetization steady state (SS) as any interruption will entail severe imaging artifacts. In this work: (a) we propose quantitative metrics to assess the temporal stability of the myocardial signal and the blood to myocardial contrast during a cine SSFP sequence; and (b) evaluate the performance of three cine bSSFP acquisitions using the...
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A respiratory and cardiac self-gated free-breathing three-dimensional cine steady-state free precession imaging method using multiecho hybrid radial sampling is presented. Cartesian mapping of the k-space center along the slice encoding direction provides intensity-weighted position information, from which both respiratory and cardiac motions are derived. With in plan radial sampling acquired a...
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BACKGROUND Cine balanced steady-state free precession (SSFP), the preferred sequence for ventricular function, demands uninterrupted radio frequency (RF) excitation to maintain the steady-state during suspended respiration. This is difficult to accomplish in sedated children. In this work, we validate a respiratory triggered (RT) SSFP sequence that drives the magnetization to steady-state befor...
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