meta-DENSE complex acquisition for reduced intravoxel dephasing.
Displacement encoding with stimulated echoes (DENSE) with a meta-DENSE readout and RF phase cycling to suppress the STEAM anti-echo is described for reducing intravoxel dephasing signal loss. This RF phase cycling scheme, when combined with existing meta-DENSE suppression of the T1 recovering signal, yields higher quality DENSE myocardial strain maps. Phantom and human images are provided to demonstrate the technique, which is capable of acquiring phase contrast displacement encoded images at low encoding gradient strengths providing better spatial resolution and less signal loss due to intravoxel dephasing than prior methods.
Aletras
Anthony H
AH
Laboratory of Cardiac Energetics, US Department of Health and Human Services, National Heart, Lung and Blood Institute, National Institutes of Heath, Bethesda, MD, USA. AletrasA@nhlbi.nih.gov
Arai
Andrew E
AE
D000465:Algorithms; D003287:Contrast Media; D006321:Heart / Q000033:anatomy & histology / Q000502:physiology; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009200:Myocardial Contraction / Q000502:physiology; D019047:Phantoms, Imaging
D003287:Contrast Media