MAGNETIC-RESONANCE ELASTOGRAPHY BY DIRECT VISUALIZATION OF PROPAGATING ACOUSTIC STRAIN WAVES
MAGNETIC-RESONANCE ELASTOGRAPHY BY DIRECT VISUALIZATION OF PROPAGATING ACOUSTIC STRAIN WAVES
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DOI：
10.1126/science.7569924
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发表时间：
1995-09-29
期刊：
影响因子：
56.9
通讯作者：
EHMAN, RL
中科院分区：
文献类型：
--
作者：
MUTHUPILLAI, R;LOMAS, DJ;EHMAN, RL
提出了一种用于定量映射材料对谐波机械激励的物理响应的核磁共振成像（MRI）方法。由此产生的图像允许计算区域机械性能。用MRI技术在凝胶材料中获得的剪切模量的测量与静态剪切模量的独立测量相关。结果表明，对应于小于200纳米的循环位移的位移模式可以被测量。研究结果表明，医学成像技术描绘弹性和其他机械性能的组织的可行性。
A nuclear magnetic resonance imaging (MRI) method is presented for quantitatively mapping the physical response of a material to harmonic mechanical excitation. The resulting images allow calculation of regional mechanical properties. Measurements of shear modulus obtained with the MRI technique in gel materials correlate with independent measurements of static shear modulus. The results indicate that displacement patterns corresponding to cyclic displacements smaller than 200 nanometers can be measured. The findings suggest the feasibility of a medical imaging technique for delineating elasticity and other mechanical properties of tissue.