Development of MRI Microscope

被引：1

作者：

Hachiya, Mahiro ^{[1
]}

Arimura, Kyohei ^{[1
]}

Ueno, Tomohiro ^{[2
]}

Matsubara, Akira ^{[3
]}

机构：

[1] Kyoto Univ, Grad Sch Sci, Kyoto 6068502, Japan

[2] Kyoto Univ, Grad Sch Med, Kyoto 6068507, Japan

[3] Kyoto Univ, Res Ctr Low Temp & Mat Sci, Kyoto 6068502, Japan

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 2010年 / 158卷 / 3-4期

基金：

日本学术振兴会;

关键词：

Helium-3; MRI; Multiple spin echoes; SOLID HE-3; SPIN ECHOES; LIQUID; RESOLUTION; DIFFUSION; MIXTURES; NMR;

D O I：

10.1007/s10909-009-9939-2

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have been developing an ultra high spatial resolution MRI, "MRI Microscope", especially for (3)He physics at ultra low temperature. The ultimate goal of our MRI Microscope is to achieve 1 mu mx1 mu m two dimensional spatial resolution comparable to optical microscopes. We constructed the MRI Microscope using a magnetic field of 7.2 T, with tri-axial magnetic field gradients of 2.0 T/m. We visualized the pure liquid (3)He in a 230 mu m diameter tube to study the effect of nonlinearity on the MRI Microscope at low temperature and in high magnetic fields. An MRI image was obtained at 0.22 MPa, 1 K with 1.8 mu mx1.8 mu m pixel size. At 65 mK, the MRI image became more blurred. We speculate that it was caused by large spin diffusion and nonlinearity.

引用

页码：697 / 703

页数：7

共 15 条

[1] DIFFUSION-LIMITED RESOLUTION IN NUCLEAR MAGNETIC-RESONANCE MICROSCOPY [J].