Anomalous scaling law for noise variance and spatial resolution in differential phase contrast computed tomography - Physics > Medical PhysicsReport as inadecuate




Anomalous scaling law for noise variance and spatial resolution in differential phase contrast computed tomography - Physics > Medical Physics - Download this document for free, or read online. Document in PDF available to download.

Abstract: In conventional absorption based x-ray computed tomography CT, the noisevariance in reconstructed CT images scales with spatial resolution following aninverse cubic relationship. Without reconstruction, in x-ray absorptionradiography, the noise variance scales as an inverse square with spatialresolution. In this letter we report that while the inverse square relationshipholds for differential phase contrast projection imaging, there exists ananomalous scaling law in differential phase contrast CT, where the noisevariance scales with spatial resolution following an inverse linearrelationship. The anomalous scaling law is theoretically derived andsubsequently validated with phantom results from an experimental Talbot-Lauinterferometer system.



Author: Guang-Hong Chen, Joseph Zambelli, Zhihua Qi, Nicholas Bevins

Source: https://arxiv.org/







Related documents