Paper Info
Title
A Micro Saddle Coil with Switchable Sensitivity for Local High-Resolution Imaging of Luminal Tissue.
Abstract
This paper reports on a micro saddle coil for local high-resolution magnetic resonance imaging (MRI) fabricated by embedding a flexible coil pattern into a polydimethyilsiloxane (PDMS) tube. We can change the sensitivity of the micro coil by deforming the shape of the coil from a saddle-shaped mode to a planar-shaped mode. The inductance, the resistance, and the Q-factor of the coil in the saddle-shaped mode were 2.45 mu H, 3.31 Omega, and 39.9, respectively. Those of the planar-shaped mode were 3.07 mu H, 3.92 Omega, and 42.9, respectively. In MRI acquired in saddle-shaped mode, a large visible area existed around the coil. Although the sensitive area was considerably reduced in the planar-shaped mode, clear MRI images were obtained. The signal-to-noise ratios (SNR) of the saddle-shaped and planar-shaped modes were 194.9 and 505.9, respectively, at voxel size of 2.0 x 2.0 x 2.0 mm(3) and 11.7 and 37.4, respectively, at voxel size of 0.5 x 0.5 x 1.0 mm(3). The sensitivity of the saddle-shaped and the planar-shaped modes were about 3 times and 10 times higher, respectively, than those of the medical head coil at both voxel sizes. Thus, the micro saddle coil enabled large-area imaging and highly sensitive imaging by switching the shape of the coil.
Year
DOI
Venue
2016
10.3390/mi7040067
MICROMACHINES
Keywords
Field
DocType
micro coil,magnetic resonance imaging (MRI),saddle coil,switchable sensitivity
Saddle,Voxel,Analytical chemistry,Inductance,Electronic engineering,Electromagnetic coil,Nuclear magnetic resonance,Materials science,Magnetic resonance imaging
Journal
Volume
Issue
Citations 
7
4
0
PageRank 
References 
Authors
0.34
0
2
Name
Order
Citations
PageRank
Tetsuji Dohi101.69
Kousuke Murashige200.34