Background Planning assist systems for cardiac MR examinations are necessary for easier operation and shorter examination times. Slice alignment systems [1] have played an important role in achieving these objectives. We propose a new automatic planning assist system for couch adjustment, local shimming, and axial multislice imaging as the input to a slice alignment system [2]. The new system e...

Methods: Neonatal rats (n = 5, 7-28 days old) were anesthetized by -chloralose and fixed to a specifically designed holder. The volume of interest (3 x 2 x 4 mm) was centered in the left hippocampus. H NMR spectra were measured at 400 MHz (9.4T) on a Varian/Magnex spectrometer using an ultra-short echo-time STEAM sequence (TE = 2 ms) with VAPOR water suppression and outer volume saturation [5]....

imaging slab, Shadowed yellow: pTILT labeling slice, dashed yellow: TILT labeling slab, green: shimming volume. Fig.3: Simulated efficiencies as a function of velocity. T1 and T2 relaxations of blood are not considered in this simulation. Fig.4: top 2 rows: multislice perfusion maps by pTILT. Color map: CBF in mL/100mL/min. Last row: z-score activation map of the second row. Fig.1: MR pulse seq...

Introduction: Parallel transmission (Tx) generalizes conventional Tx and RF shimming, offering extra degrees of freedom and significant opportunities for optimizing Tx performance, improving pulse design trade-off, and leveraging new coil concepts. The present work of developing a 32 Tx-channel system reflects an interest in 1) exploring the opportunities thoroughly and acquiring insights to th...

Abstract The large acoustic noise of 80-110 dB during magnetic resonance imaging (MRI) scanning harms patients’ comfort and health. can be reduced by hardware modification or active control, but these methods are expensive, difficult, not very effective. In this study, a sequence optimization method is used to mitigate the problem while maintaining image quality. 4 th order polynomial function ...