论文标题
通过相检索启用的弱吸收样品的多色中子相对比成像
Polychromatic neutron phase contrast imaging of weakly absorbing samples enabled by phase retrieval
论文作者
论文摘要
我们证明了使用相位检索技术与多色光束进行基于繁殖的相对比中子成像。这使得具有低吸收对比度的成像样品和/或改善信号 - 噪声比率以促进例如时间解决测量值。一种金属样品，设计为靠近纯相对象，并使用带有D2O的运河的骨骼样品来演示该技术。用多色中子束对这些样品进行成像，然后进行相检索。对于两个样品，信噪比得到显着提高，并且在骨骼样本的情况下，相位检索允许骨和D2O分离，例如，对于原位流实验而言，这一点很重要。使用脱水对比的使用避免了化学对比度增强的使用，并使中子成像成为骨骼X射线成像的有趣补充方法。
We demonstrate the use of a phase retrieval technique for propagation-based phase contrast neutron imaging with a polychromatic beam. This enables imaging samples with low absorption contrast and/or improving the signal-to-noise ratio to facilitate e.g. time resolved measurements. A metal sample, designed to be close to a pure phase object, and a bone sample with canals partially filled with D2O were used for demonstrating the technique. These samples were imaged with a polychromatic neutron beam followed by phase retrieval. For both samples the signal-to-noise ratio were significantly improved and in case of the bone sample, the phase retrieval allowed for separation of bone and D2O, which is important for example for in situ flow experiments. The use of deuteration-contrast avoids the use of chemical contrast enhancement and makes neutron imaging an interesting complementary method to X-ray imaging of bone.
