In hematological diseases the composition of red bone marrow shows alterations. The relaxation times
T 1 and
T 2 of water and lipids in human hemopoietic bone marrow of 14 normal volunteers and 10 patients with acute leukemia and bone marrow carcinosis are determined using a double spin echo spectroscopy sequence
in vivo. The volumes of interest (VOI) of (13 mm)
3 in the center of vertebral bodies are examined using different measurement parameters. For
T 1 measurements an inversion-recovery method is used.
T 2 is evaluated from spectra with different
TE. T 1 (water) is found in a range between 1000 and 1700 ms,
T 1 (lipids) in a range between 260 and 320 ms in healthy volunteers.
T 2 (water) is determined between 32 and 65 ms. In some cases phase distortions of the water signals occur in the spectra. Water flow within the VOI may be a possible reason.
T 2 (lipids) is evaluated between 73 and 91 ms. The patients with acute leukemia exhibit clearly reduced lipid signals in their spectra. Lipid relaxation times could not be determined in these cases.
T 2 (water) is prolonged in acute leukemia to 51–98 ms.
T 1 (water) was not significantly different from values of healthy volunteers in our measurements. Results are discussed in comparison to relaxometric data from imaging and STEAM spectroscopic methods of other authors.
相似文献