منابع مشابه
Reduction of artifacts by optimization of the sensitivity map in sensitivity-encoded spectroscopic imaging.
Sensitivity-encoded spectroscopic imaging (SENSE-SI) reduces scanning time by using multiple coils for parallel signal acquisition. Significant artifacts could be induced by SENSE-SI, mainly due to the low-resolution nature of spectroscopic imaging. The present study introduces a novel method to reduce the artifacts. High-resolution sensitivity maps are used in low-resolution SENSE reconstructi...
متن کاملToward Ex Situ Phase-Encoded Spectroscopic Imaging
Spectroscopic imaging of a sample placed outside of both the radio frequency and the imaging gradient coils is presented. The sample is placed in a field with a permanent one-dimensional inhomogeneity. The imaging gradients used for phase encoding are designed to produce a static field that depends only on the transverse direction, uncoupling the effects associated with the single-sided nature ...
متن کامل3D sensitivity encoded ellipsoidal MR spectroscopic imaging of gliomas at 3T.
PURPOSE The goal of this study was to implement time efficient data acquisition and reconstruction methods for 3D magnetic resonance spectroscopic imaging (MRSI) of gliomas at a field strength of 3T using parallel imaging techniques. METHODS The point spread functions, signal to noise ratio (SNR), spatial resolution, metabolite intensity distributions and Cho:NAA ratio of 3D ellipsoidal, 3D s...
متن کاملSensitivity 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 کاملSpectroscopic imaging from spatially-encoded single-scan multidimensional MRI data.
We have recently proposed a protocol for retrieving multidimensional magnetic resonance images within a single scan, based on a spatial encoding of the spin interactions. This methodology relies on progressively dephasing spin coherences throughout a sample; for instance, by sweeping a radiofrequency pulse in the presence of a magnetic field gradient. When spins are suitably refocused by a seco...
متن کاملذخیره 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: Magnetic Resonance in Medicine
سال: 2001
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.1250