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We compared the proposed three-dimensional perfusion method with the standard 2DFT http://www.selleck.cn/products/VX-809.html approach by consecutively acquiring both data during each R�CR interval in cardiac patients. The mean and standard deviation of the correlation coefficients between time intensity curves of three-dimensional versus 2DFT were 0.94 and 0.06 across seven subjects. The linear correlation between the two sets of upslope values was significant (r = 0.78, P http://www.selleckchem.com/products/lgk-974.html relaxation rate ��R2* and to theoretical predictions. QSM images were referenced to ventricular cerebrospinal fluid (CSF) for each dynamic of the perfusion sequence. Images of cerebral blood flow and blood volume were successfully reconstructed from the QSM-analysis, and were comparable to those reconstructed using ��R2*. The magnitudes of the Gd-associated susceptibility effects in gray and white matter were consistent with theoretical predictions. QSM-based analysis may have some theoretical advantages compared with ��R2*, including a simpler relationship between signal change and Gd concentration. However, disadvantages are its much lower http://www.selleckchem.com/products/17-AAG(Geldanamycin).html contrast-to-noise ratio, artifacts due to respiration and other effects, and more complicated reconstruction methods. More work is required to optimize data acquisition protocols for QSM-based perfusion imaging. Magn Reson Med, 2014. ? 2014 Wiley Periodicals, Inc. ""To develop a technique for high resolution, four-dimensional (4D), multiphase, steady-state imaging with contrast enhancement (MUSIC) in children with complex congenital heart disease. Eight pediatric patients underwent cardiovascular MRI with controlled mechanical ventilation after ferumoxytol administration. Breath-held contrast-enhanced MRA (CE-MRA) was performed during the first-pass and delayed phases of ferumoxytol, followed by a respiratory gated, 4D MUSIC acquisition during the steady state distribution phase of ferumoxytol. The subjective image quality and image sharpness were evaluated. Assessment of ventricular volumes based on 4D MUSIC was compared with those based on multislice 2D cardiac cine MRI. The 4D MUSIC technique provided cardiac-phase-resolved (65�C95 ms temporal resolution) and higher spatial resolution (0.6�C0.9 mm isotropic) images than previously achievable using first-pass CE-MRA or 2D cardiac cine. When compared with Ferumoxytol-based first-pass CE-MRA, the 4D MUSIC provided sharper images and better definition of the coronary arteries, aortic root, myocardium, and pulmonary trunk (P?