Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fast library-driven approach for implementation of the voxel spread
  function technique for correcting magnetic field inhomogeneity artifacts   Purpose: Previously-developed Voxel Spread Function (VSF) method (Yablonskiy,
et al, MRM, 2013;70:1283) provides means to correct artifacts induced by
macroscopic magnetic field inhomogeneities in the images obtained by
multi-Gradient-Recalled-Echo (mGRE) techniques. The goal of this study is to
develop a library-driven approach for fast VSF implementation. Methods: The VSF
approach describes the contribution of the magnetic field inhomogeneity effects
on the mGRE signal decay in terms of the F-function calculated from mGRE phase
and magnitude images. A pre-calculated library accounting for a variety of
background field gradients caused by magnetic field inhomogeneities was used
herein to speed up calculation of the F-function and to generate quantitative
R2* maps from the mGRE data collected from two healthy volunteers. Results: As
compared with direct calculation of the F-function based on a voxel-wise
approach, the new library-driven method substantially reduces computational
time from several hours to few minutes, while, at the same time, providing
similar accuracy of R2* mapping. Conclusion: The new procedure proposed in this
study provides a fast post-processing algorithm that can be incorporated in the
quantitative analysis of mGRE data to account for background field
inhomogeneity artifacts, thus can facilitate the applications of mGRE-based
quantitative techniques in clinical practices.

27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys