Multi-resolution radiograph alignment for motion correction in x-ray micro-tomography

Shane J. Latham; Andrew M. Kingston; Benoit Recur; Glenn R. Myers; Adrian P. Sheppard

doi:10.1117/12.2238259

3 October 2016 Multi-resolution radiograph alignment for motion correction in x-ray micro-tomography

Shane J. Latham, Andrew M. Kingston, Benoit Recur, Glenn R. Myers, Adrian P. Sheppard

Proceedings Volume 9967, Developments in X-Ray Tomography X; 996710 (2016) https://doi.org/10.1117/12.2238259
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States

Abstract

Achieving sub-micron resolution in lab-based micro-tomography is challenging due to the geometric instability of the imaging hardware (spot drift, stage precision, sample motion). These instabilities manifest themselves as a distortion or motion of the radiographs relative to the expected system geometry. When the hardware instabilities are small (several microns of absolute motion), the radiograph distortions are well approximated by shift and magnification of the image. In this paper we examine the use of re-projection alignment (RA) to estimate per-radiograph motions. Our simulation results evaluate how the convergence properties of RA vary with: motion-type (smooth versus random), trajectory (helical versus space-filling) and resolution. We demonstrate that RA convergence rate and accuracy, for the space-filling trajectory, is invariant with regard to the motion-type. In addition, for the space-filling trajectory, the per-projection motions can be estimated to less than 0.25 pixel mean absolute error by performing a single quarter-resolution RA iteration followed by a single half-resolution RA iteration. The direct impact is that, for the space-filling trajectory, we need only perform one RA iteration per resolution in our iterative multi-grid reconstruction (IMGR).We also give examples of the effectiveness of RA motion correction method applied to real double-helix and space-filling trajectory micro-CT data. For double-helix Katsevich filtered-back-projection reconstruction (≈2500x2500x5000 voxels), we use a multi-resolution RA method as a pre-processing step. For the space-filling iterative reconstruction (≈2000x2000x5400 voxels), RA is applied during the IMGR iterations.

Conference Presentation

Citation Download Citation

Shane J. Latham, Andrew M. Kingston, Benoit Recur, Glenn R. Myers, and Adrian P. Sheppard "Multi-resolution radiograph alignment for motion correction in x-ray micro-tomography", Proc. SPIE 9967, Developments in X-Ray Tomography X, 996710 (3 October 2016); https://doi.org/10.1117/12.2238259

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available