Optimization of signal behavior in the transition to driven equilibrium in steady-state free precession sequences
نویسندگان
چکیده
منابع مشابه
Influence of longitudinal position on the evolution of steady-state signal in cardiac cine balanced steady-state free precession imaging
Background Emerging quantitative cardiac magnetic resonance imaging (CMRI) techniques use cine balanced steady-state free precession (bSSFP) to measure myocardial signal intensity and probe underlying physiological parameters. This correlation assumes that steady-state is maintained uniformly throughout the heart in space and time. Purpose To determine the effects of longitudinal cardiac moti...
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Introduction: T1ρ MRI is typically performed by magnetization preparation followed by a readout sequence during which the T1ρ-weighted signal is frequency and phase encoded (1). This paradigm is inherently time inefficient and, instead, it might be desirable to continuously acquire the T1ρ-weighted signal in the steady-state. Unfortunately, it isn’t clear how to establish a steady-state T1ρ con...
متن کاملLinear combination steady-state free precession MRI.
A new, fast, spectrally selective steady-state free precession (SSFP) imaging method is presented. Combining k-space data from SSFP sequences with certain phase schedules of radiofrequency excitation pulses permits manipulation of the spectral selectivity of the image. For example, lipid and water can be resolved. The contrast of each image depends on both T1 and T2, and the relative contributi...
متن کاملMR angiography using steady-state free precession.
Contrast-enhanced MR angiography (CE-MRA) using steady-state free precession (SSFP) pulse sequences is described. Using SSFP, vascular structures can be visualized with high signal-to-noise ratio (SNR) at a substantial (delay) time after the initial arterial pass of contrast media. The peak blood SSFP signal was diminished by <20% 30 min after the initial administration of 0.2 mmol/kg of Gd-che...
متن کاملQuantitative analysis of the diffusion-weighted steady-state free precession signal in vertebral bone marrow lesions.
OBJECTIVES : Diffusion-weighted steady-state free precession (DW-SSFP) sequences have shown great potential for the differential diagnosis of benign osteoporotic and malignant neoplastic vertebral compression fractures, which appear hypo- to isointense or hyperintense in DW-SSFP magnetic resonance imaging, respectively. In contrast to other diffusion weighting sequences, the DW-SSFP signal depe...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2002
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.10274