Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Development of a Method for Tissue Elasticity Imaging Using Tagged
  Magnetic Resonance Imaging   The purpose of this study was to develop a method for tissue elasticity
imaging using tagged magnetic resonance imaging (MRI). First, we developed a
cyclic pressure device that used air to remotely transmit the power to generate
cyclic deformation in an object. The pressure induced by the cyclic pressure
device was measured by MRI-compatible force sensors. Second, we developed a
software to calculate Young's modulus from tagged MRI data using the harmonic
phase (HARP) method and the finite element method (FEM). We also developed a
software to extract tag-cross points from tagged MRI data. Finally, we
evaluated the usefulness of our method using three homogeneous silicone gel
phantoms with different degrees of stiffness in comparison with Young's moduli
measured by a material testing machine. The coefficient of variation of the
pressure data measured by MRI-compatible force sensors was within 5 %,
indicating that the reproducibility of the pressure generated by our cyclic
pressure device was good. The Young's moduli obtained by the material testing
machine, the HARP method, and the FEM increased with increasing stiffness of
the phantoms. There were relatively good agreements among the three methods.
These results suggest that our method is useful for tissue elasticity imaging
and for quantifying the stiffness of tissues.

6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex