Part 2 of the raw data for the paper "Effect of partial H2O-D2O replacement on the anisotropy of transverse proton spin relaxation in bovine articular cartilage", Sirisha Tadimalla and Konstantin I. Momot

Anisotropy of transverse proton spin relaxation in collagen-rich tissues like cartilage and tendon is a well-known phenomenon that manifests itself as the "magic-angle" effect in magnetic resonance images of these tissues. It usually attributed to the non-zero averaging of intra-molecular dipolar interactions in water molecules bound to oriented collagen fibers. One way to manipulate the contributions of these interactions to spin relaxation is by partially replacing the water in the cartilage sample with deuterium oxide. It is known that dipolar interactions in deuterated solutions are weaker, resulting in a decrease in proton relaxation rates. In this work, we investigate the effects of deuteration on the longitudinal and the isotropic and anisotropic contributions to transverse relaxation of water protons in bovine articular cartilage. We demonstrate that the anisotropy of transverse proton spin relaxation in articular cartilage is independent of the degree of deuteration, bringing into question some of the assumptions currently held over the origins of relaxation anisotropy in oriented tissues.富胶原组织（如软骨与肌腱）中的横向质子自旋弛豫各向异性是一种广为人知的现象，该现象在这类组织的磁共振图像中表现为魔角效应（magic-angle effect）。该现象通常被归因于结合于定向胶原纤维的水分子的分子内偶极相互作用存在非零平均。一种调控此类相互作用对自旋弛豫贡献的方法是，使用氧化氘（deuterium oxide）部分置换软骨样本中的水。已知氘代溶液中的偶极相互作用强度更低，会导致质子弛豫速率降低。本研究探究了氘代对牛关节软骨中水质子的纵向弛豫、横向弛豫的各向同性与各向异性分量的影响。我们证实，牛关节软骨中的横向质子自旋弛豫各向异性与氘代程度无关，这对当前关于定向组织中弛豫各向异性起源的部分主流假设提出了质疑。