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.
| Original language | English (US) |
|---|---|
| Article number | 063705 |
| Journal | Review of Scientific Instruments |
| Volume | 78 |
| Issue number | 6 |
| DOIs | |
| State | Published - 2007 |
Funding
The use of the Advanced Photon Source is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. W-31-109-ENG-38.
ASJC Scopus subject areas
- Instrumentation