title: Practical error estimation in zoom-in and truncated tomography reconstructions.
abstract: Synchrotron-based microtomography provides high resolution, but the resolution in large samples is often limited by the detector field of view and the pixel size. For some samples, only a small region of interest is relevant and local tomography is a powerful approach for retaining high resolution. Two methods are truncated tomography and zoom-in tomography. In this article we use existing theoretical results to estimate the error present in truncated and zoom-in tomographic reconstructions. These errors agree with the errors calculated from exact tomographic reconstructions. We argue in a heuristic manner why zoom-in tomography is superior to the truncated tomography in terms of the reconstruction error. However, the theoretical formula is not usable in practice because it requires the complete high-resolution reconstruction to be known. To solve this problem we proposed a practical method for estimating the error in zoom-in and truncated tomographies. The results using this estimation method are in very good agreement with our experimental results.
authors.affiliation: Advanced Photon Source, X-ray Science Division, Argonne National Laboratory, Argonne, IL 60439, USA. xhxiao@aps.anl.gov
authors.forename: Xianghui
authors.initials: X
authors.lastname: Xiao
authors.forename: Francesco
authors.initials: F
authors.lastname: De Carlo
authors.forename: Stuart
authors.initials: S
authors.lastname: Stock
mesh_terms: D000465:Algorithms; D016477:Artifacts; D021621:Imaging, Three-Dimensional / Q000379:methods*; D011856:Radiographic Image Enhancement / Q000379:methods*; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014054:Tomography / Q000379:methods*