Cardiovascular Imaging at 3T
نویسنده
چکیده
The challenges for cardiac MR imaging range in a magic triangle of spatial and temporal resolution, signal-to-noise ratio and the limitations induced by the need for breath-hold imaging. With the advent of multi-channel whole-body MRI systems at 3Tesla, these limitations can now be overcome. Parallel acquisition techniques (PAT) allow increasing temporal or spatial resolution at virtually no costs in acquisition time. The higher field strength at 3T makes up for the loss of signal-to-noise ratio (SNR) induced by fast scanning with PAT. With the combination of PAT and 3T, real-time acquisitions have now become feasible obviating the need for breathhold cardiac MRI.
منابع مشابه
3 Tesla MR imaging provides improved contrast in first-pass myocardial perfusion imaging over a range of gadolinium doses.
PURPOSE To compare myocardial enhancement during first-pass myocardial perfusion imaging at 3.0 Tesla (T) and 1.5T. MATERIALS AND METHODS First-pass myocardial perfusion imaging was performed on twelve normal subjects at 3T and 1.5T using an interleaved notched saturation recovery gradient echo pulse sequence. Subjects received either 0.10 mmol/kg for both scans (group 1), 0.075 mmol/kg for b...
متن کاملAge and sex corrected normal reference values of T1, T2 T2* and ECV in healthy subjects at 3T CMR
BACKGROUND Myocardial T1, T2 and T2* imaging techniques become increasingly used in clinical practice. While normal values for T1, T2 and T2* times are well established for 1.5 Tesla (T) cardiovascular magnetic resonance (CMR), data for 3T remain scarce. Therefore we sought to determine normal reference values relative to gender and age and day to day reproducibility for native T1, T2, T2* mapp...
متن کاملThree-dimensional balanced steady state free precession myocardial perfusion cardiovascular magnetic resonance at 3T using dual-source parallel RF transmission: initial experience
BACKGROUND The purpose of this study was to establish the feasibility of three-dimensional (3D) balanced steady-state-free-precession (bSSFP) myocardial perfusion cardiovascular magnetic resonance (CMR) at 3T using local RF shimming with dual-source RF transmission, and to compare it with spoiled gradient echo (TGRE) acquisition. METHODS Dynamic contrast-enhanced 3D bSSFP perfusion imaging wa...
متن کاملSusceptibility-weighted cardiovascular magnetic resonance in comparison to T2 and T2 star imaging for detection of intramyocardial hemorrhage following acute myocardial infarction at 3 Tesla
BACKGROUND Intramyocardial hemorrhage (IMH) identified by cardiovascular magnetic resonance (CMR) is an established prognostic marker following acute myocardial infarction (AMI). Detection of IMH by T2-weighted or T2 star CMR can be limited by long breath hold times and sensitivity to artefacts, especially at 3T. We compared the image quality and diagnostic ability of susceptibility-weighted ma...
متن کاملValidation of in vivo 2D Displacements from Spiral Cine DENSE at 3T
BACKGROUND Displacement Encoding with Stimulated Echoes (DENSE) encodes displacement into the phase of the magnetic resonance signal. Due to the stimulated echo, the signal is inherently low and fades through the cardiac cycle. To compensate, a spiral acquisition has been used at 1.5T. This spiral sequence has not been validated at 3T, where the increased signal would be valuable, but field inh...
متن کامل