Duvvuri U, Kaufman J H, Patel S D, Bolinger L, Kneeland J B, Leigh J S, Reddy R
Department of Radiology, MMRRCC, University of Pennsylvania, Philadelphia 19104, USA.
Magn Reson Med. 1998 Sep;40(3):370-5. doi: 10.1002/mrm.1910400306.
The effects of mechanical compression on the multiple quantum coherences generated from sodium ions in articular cartilage were investigated. Cartilage samples obtained from bovine patellae were studied during compression at 0.7 MPa (100 psi) for 1 hour. The double quantum filtered spectra showed marked lineshape changes in the compressed samples. Compression did not seem to influence the lineshapes of the single quantum and triple quantum filtered spectra significantly. We found that the residual quadrupolar interaction was reduced in the compressed samples. Changes in the ordering of collagen fibers may be responsible for the observed effect.
研究了机械压缩对关节软骨中钠离子产生的多量子相干性的影响。对从牛髌骨获取的软骨样本在0.7兆帕（100磅力/平方英寸）压力下压缩1小时的过程进行了研究。双量子滤波光谱显示压缩样本中的线形有明显变化。压缩似乎对单量子和三量子滤波光谱的线形没有显著影响。我们发现压缩样本中残余四极相互作用降低。胶原纤维排列顺序的变化可能是观察到的这种效应的原因。
