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• W2093899211 abstract "AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract Analysis of the intramedullary cell distribution by magnetic resonance imaging (MRI) using conventional techniques involves subjectively interpreting images and estimating the cell distribution on the basis of signal intensity characteristics. In recent years, attempts have been made to achieve more precise analysis by new techniques, including chemical shift imaging. The multiple spin-echo (MSE) technique offers some advantages over conventional MRI. Since it allows measurement of the transverse magnetization decay curve at 32 or more points, it is capable of separating several tissue components with different relaxation times. In addition, this technique can be used with MRI instruments having a static magnetic field as low as 1.0 Tesla. In the present study, the intramedullary cell density was assessed by MRI using the MSE technique in 4 patients with aplastic anemia (AA), 4 patients with myelodysplastic syndrome (MDS), and 5 normal subjects. The water component of the marrow (with a short relaxation time) and the fat component (with a long relaxation time) were separated from each other by analyzing MR images obtained using the MSE technique, and the signal intensity ratio of the 2 components was calculated. The ratio was significantly higher in the AA group than in the other groups (AA vs. MDS, P = 0.0209, AA vs. normal controls, P = 0.0143). The present technique appears promising for quantitative assessment of the intramedullary cell density. Am. J. Hematol. 55:134–138, 1997. © 1997 Wiley-Liss, Inc. References 1 Vogler JB III, Murphy WA: Bone marrow imaging. Radiology 168: 679– 693, 1988. 2 Olson DO, Shields AF, Scheurich CJ, et al: Magnetic resonance imaging of the bone marrow in patients with leukemia, aplastic anemia, and lymphoma. Invest Radiol 21: 540– 546, 1986. 3 Stevens SK, Moore SG, Amylon MD: Repopulation of marrow after transplantation: MR imaging with pathologic correlation. Radiology 175: 213– 218, 1990. 4 Steiner RM, Mitchell DG, Rao VM, et al: Magnetic resonance imaging of bone marrow: Diagnostic value in diffuse hematologic disorders. Magn Reson Q 6: 17– 34, 1990. 5 Wismer GL, Rosen BR, Buxton R, et al: Chemical shift imaging of bone marrow: Preliminary experience. AJR 145: 1031– 1037, 1985. 6 Brateman L: Chemical shift imaging: A review. AJR 146: 971– 980, 1986. 7 McKinstry CS, Steiner RE, Young AT, et al: Bone marrow in leukemia and aplastic anemia: MR imaging before, during, and after treatment. Radiology 162: 707– 721, 1987. 8 Schick F, Einsele H, Bongers H, et al: Leukemic red bone marrow changes assessed by magnetic resonance imaging and localized 1H spectroscopy. Ann Hematol 66: 3– 13, 1993. 9 Haida M, Yamamoto M, Matsumura H, et al: Intracellular and extracellular spaces of normal adult rat brain determined from the proton nuclear magnetic resonance relaxation times. J Cereb Blood Flow Metab 7: 552– 556, 1987. 10 Hazlewood FC, Change DC, Nichols BC, et al: Nuclear magnetic resonance transverse relaxation times of water protons in skeletal muscle. Biophys J 14: 583– 606, 1974. 11 Shioya S, Haida M, Tsuji C, et al: Acute and repair stage characteristics of magnetic resonance relaxation times in oxygen-induced pulmonary edema. Magn Reson Med 8: 450– 459, 1988. 12 Carr HY, Purcell EM: Effects of diffusion on free precession in nuclear magnetic resonance experiments. Phys Rev 94: 630– 638, 1954. 13 Mulkern RV, Meng J, Oshio K, et al: Bone marrow characterization in the lumbar spine with inner volume spectroscopic CPMG imaging studies. JMRI 4: 585– 589, 1994. 14 Shioya S, Haida M, Ono Y, et al: Tissue characterization of pneumonia and irradiated rat lungs with magnetic resonance relaxation times. Magn Reson Imag 12: 799– 803, 1994. 15 Golfieri R, Baddeley H, Pringle JS, et al: The role of the STIR sequence in magnetic resonance imaging examination of bone tumours. Br J Rad 63: 251– 256, 1990. 16 Ricci C, Cova M, Kang YS, et al: Normal age-related patterns of cellular and fatty bone marrow distribution in the axial skeleton: MR imaging study. Radiology 177: 83– 88, 1990. 17 Moore SG, Dawson KL: Red and yellow marrow in the femur: Agerelated changes in appearance at MR imaging. Radiology 175: 219– 223, 1990. 18 Pykett IL, Rosen BR, Buonanno FS, et al: Measurement of spin-lattice relaxation times in nuclear magnetic resonance imaging. Phys Med Biol 28: 723– 729, 1983. 19 Kurita D, Haida M, Shinohara S, et al: A fundamental study of 1H relaxation times measured with MRI equipment: Comparison with NMR equipment for instrument analysis. J Physiol Soc Jpn 24: 257– 262, 1994. 20 Nand S, Godwin JE: Hypoplastic myelodysplastic syndromes. Cancer 62: 958– 964, 1988. Citing Literature Volume55, Issue3July 1997Pages 134-138 ReferencesRelatedInformation" @default.
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• W2093899211 title "Analysis of intramedullary cell density by MRI using the multiple spin-echo technique" @default.
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