Pushing the limits: Ultrafast 2D accelerated High Resolution Whole-Head Volumetric Functional Imaging at 7 Tesla

نویسندگان

  • T. Nguyen
  • S. Moeller
  • U. Goerke
  • E. Yacoub
  • K. Ugurbil
چکیده

reconstructed 16fold (4x4) accelerated wholehead coverage 3DEPI volume scan acquired with isotropic 1 mm nominal spatial resolution in 3.6 s/vol. Shown are samples of axial, coronal, and sagittal slices from a single volume (no averaging), demonstrating the data quality and spatial coverage. Fig. 2: (Top) Sliceaveraged normalized standard deviation of temporal signal fluctuations (NSD) was higher for 3D4x4 in the 4 subjects with general reduced ROI max t-score, but results yielded high quality activation maps (bottom row). Pushing the limits: Ultrafast 2D accelerated High Resolution Whole-Head Volumetric Functional Imaging at 7 Tesla

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

ثبت نام

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

A Specialized Multi-Transmit Head Coil for High Resolution fMRI of the Human Visual Cortex at 7T

PURPOSE To design, construct and validate radiofrequency (RF) transmit and receive phased array coils for high-resolution visual cortex imaging at 7 Tesla. METHODS A 4 channel transmit and 16 channel receive array was constructed on a conformal polycarbonate former. Transmit field efficiency and homogeneity were simulated and validated, along with the Specific Absorption Rate, using [Formula:...

متن کامل

1.5 versus 3 versus 7 Tesla in abdominal MRI: A comparative study

OBJECTIVES The aim of this study was to investigate and compare the feasibility as well as potential impact of altered magnetic field properties on image quality and potential artifacts of 1.5 Tesla, 3 Tesla and 7 Tesla non-enhanced abdominal MRI. MATERIALS AND METHODS Magnetic Resonance (MR) imaging of the upper abdomen was performed in 10 healthy volunteers on a 1.5 Tesla, a 3 Tesla and a 7...

متن کامل

High Temporal Resolution Functional Magnetic Resonance Imaging at 7 Tesla

Speed has always been a critical consideration in magnetic resonance imaging (MRI), promising dramatic gains in imaging speed, a reduction in motion and susceptibility artifacts, and ultimately increased throughput for clinical studies. In the context of functional magnetic resonance imaging (fMRI), MRI pulse sequences designed to increase the speed and spatial resolution have always been a top...

متن کامل

Three-dimensional echo planar imaging with controlled aliasing: A sequence for high temporal resolution functional MRI.

PURPOSE In this work, we combine three-dimensional echo planar imaging (3D-EPI) with controlled aliasing to substantially increase temporal resolution in whole-brain functional MRI (fMRI) while minimizing geometry-factor (g-factor) losses. THEORY AND METHODS The study was performed on a 7 Tesla scanner equipped with a 32-channel receive coil. The proposed 3D-EPI-CAIPI sequence was evaluated f...

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

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2008