Proton Magnetic Resonance of Biological Systems

核磁共振（NMR），其结构和动力学的综合灵敏度，是一种行之有效的技术，用于生物系统的研究。由于生命过程发生在溶液中，这些系统中水的质子NMR应该包含重要的信息。实际上，医学磁共振成像（MRI）依赖于由来自不同类型的正常组织之间以及正常组织与病理组织之间的组织水的信号差异提供的精细对比。然而，我们对这种精致的MR对比度的基本起源的理解仍然处于原始阶段。

Nuclear magnetic resonance (NMR), with its combined sensitivity to both structure and dynamics, is a well-proven technique for the study of biological systems. Since life processes occur in solution, the proton NMR of water in these systems should contain important information. Indeed, medical magnetic resonance imaging (MRI) relies on the exquisite contrast provided by differences in signal from tissue water between different types of normal tissue and between normal and pathological tissue. However, our understanding of the fundamental origins of this exquisite MR contrast is still at a primitive stage.