Three dimensional echo-planar imaging at 7 Tesla

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Three dimensional echo-planar imaging at 7 Tesla

Functional MRI (fMRI) most commonly employs 2D echo-planar imaging (EPI). The advantages for fMRI brought about by the increasingly popular ultra-high field strengths are best exploited in high-resolution acquisitions, but here 2D EPI becomes impractical for several reasons, including the very long volume acquisitions times. In this study at 7 T, a 3D EPI sequence with full parallel and partial...

متن کامل

Double-sampled echo-planar imaging at 3 tesla.

A persistent artifact in the images acquired by the echo-planar imaging (EPI) method is the Nyquist or N/2 ghost which interferes with the image and reduces the signal-to-noise ratio (SNR). The Nyquist ghost is the result of the time-reversal asymmetry between the even and odd echoes. To eliminate this artifact, the authors present a double-sampled EPI (DSEPI) method in which echoes from each e...

متن کامل

Sensitivity Encoded Proton Echo Planar Spectroscopic Imaging (PEPSI) in Human Brain at 7 Tesla

choline, glutamate and inositol (32x32 matrix) with 2-fold SENSE acceleration. Fig.3 Fully sampled PEPSI maps of non-suppressed water (64x64 matrix) and metabolite maps of NAA, creatine, choline, glutamate and inositol (32x32 matrix), acquired in 8.5 min with 0.63 cc voxel size. Fig.1 Non-water-suppressed PEPSI maps on phantom at 7 T show good reconstruction performance for up to 4-fold acceler...

متن کامل

Three Dimensional Spectroscopic Imaging in the Prostate with a Surface Combined Endorectal Coil at 7 Tesla

INTRODUCTION: The benefits of performing prostate spectroscopy at 7T include increased spectral and spatial resolution. The potential exists to be able to better quantify individual metabolites, localize smaller volumes of disease and better monitor disease progression or treatment response. However, spectroscopy in the body at 7T faces many challenges including the well described destructive i...

متن کامل

Achieving sufficient spectral bandwidth for volumetric 1H echo-planar spectroscopic imaging at 4 Tesla.

Complete coverage of the in vivo proton metabolite spectrum, including downfield resonances, requires a spectral bandwidth of approximately 9 ppm. Spectral bandwidth of in vivo echo-planar spectroscopic imaging (EPSI) is primarily limited by gradient strength of the oscillating readout gradient, gradient slew rate, and limits on peripheral nerve stimulation for human subjects. Furthermore, conv...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: NeuroImage

سال: 2010

ISSN: 1053-8119

DOI: 10.1016/j.neuroimage.2010.01.108