| Budget Amount *help |
¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2013: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2012: ¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000)
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| Outline of Final Research Achievements |
We developed a magnetic resonance (MR) microscope using a high critical-temperature superconducting bulk magnet. The bulk magnet comprises six annular bulk superconductors (two end bulk magnets : 60 mm OD, 28 mm ID, and 23 mm height, four inner bulk magnets : 60 mm OD, 36 mm ID, and 18.5 mm height) made of c-axis oriented single-domain EuBa2Cu3Oy crystals. The magnet was energized using a superconducting NMR magnet for high-resolution NMR spectroscopy operating at 4.7 T. The trapped magnetic field was homogenized using a single-layer shim-coil developed in our group. The inhomogeneity of the trapped magnetic field measured with MR imaging was 15.4 ppm (peak-to-peak) in the 8.4 mm diameter and 10 mm long cylindrical region. Three-dimensional MR images of a chemically-fixed mouse fetus acquired with 50 micrometer cube voxels demonstrated the usefulness of our system.
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