QUANTITATIVE MAGNETIC-RESONANCE FLOW AND DIFFUSION IMAGING IN POROUS-MEDIA

被引：16

作者：

RAJANAYAGAM, V

YAO, SG

POPE, JM

机构：

[1] School of Physics, University of New South Wales, Kensington

来源：

MAGNETIC RESONANCE IMAGING | 1995年 / 13卷 / 05期

关键词：

NMR MICROSCOPY; POROUS MEDIA; VELOCITY IMAGING; DIFFUSION IMAGING;

D O I：

10.1016/0730-725X(95)00022-9

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

Quantitative flow and diffusion measurements have been made for water in model porous media, using magnetic resonance micro-imaging methods. The samples consisted of compacted glass beads of various sizes down to 1 mm diameter. Typical flow and diffusion images exhibited a spatial resolution of 117 mu m X 117 mu m and velocities in the range 1-2 mm/s, Comparison of volume flow Fates calculated from the flow velocity maps with values measured directly yielded good agreement in all cases. There was also good agreement between the mean diffusion coefficient of water calculated from the diffusion maps and the bulk diffusion coefficient for pure water at the same temperature, In addition, the mean diffusion coefficient did not depend on the pore sizes in the bead diameter range of 1-3 mm. Our results also show that partial volume effects can be compensated by appropriate thresholding of the images prior to the final Fourier transformation in the flow-encoding dimension.

引用

页码：729 / 738

页数：10

共 33 条

[1]

Glasel, Lee, On the interpretation of water nuclear magnetic resonance relaxation times in heterogeneous systems, Journal of the American Chemical Society, 96, pp. 970-978, (1979)

[2]

Lipsicas, Banavar, Willemsen, Surface relaxation and pore sizes in rocks—A nuclear magnetic resonance analysis, Applied Physics Letters, 49, pp. 1544-1546, (1986)

[3]

Kleinberg, Horsfield, Transverse relaxation processes in porous sedimentary rocks, J. Magn. Reson., 88, pp. 9-19, (1990)

[4]

Wilkinson, Johnson, Schwartz, Nuclear magnetic relaxation in porous media The role of mean lifetime τ (ϱ D), Physical Review B, 10, pp. 4960-4973, (1991)

[5]

Rothwell, Vinegar, Petrophysical applications of NMR imaging, Appl. Optics, 24, pp. 3969-3972, (1985)

[6]

Hall, Rajanayagam, Hall, Chemical-shift imaging of water and n-dodecane in sedimentary rocks, J. Magn. Reson., 68, pp. 185-188, (1986)

[7]

Maerfat, Palmer, Yamanashi, Lester, Determination of oil and water in reservoir core samples using magnetic resonance imaging, Magnetic Resonance Imaging, 4, (1986)

[8]

Hall, Rajanayagam, Thin-slice, chemical-shift imaging of oil and water in sandstone rock at 80 MHz, J. Magn. Reson., 74, pp. 139-146, (1987)

[9]

Horsfield, Hall, Hall, Two species chemical shift imaging using prior knowledge and estimation theory. Application to rock cores, J. Magn. Recon., 87, pp. 319-330, (1990)

[10]

Majors, Smith, Kovarik, Fukushima, NMR spectroscopic imaging of oil displacement in dolomite, J. Magn. Reson., 89, pp. 470-478, (1990)

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