The reference scan method is a simple yet powerful method for measuring spatial drift of the x-ray spot during a low-cone-angle μ-CT experiment. As long as the drift is smooth, and occurring on a time scale that is long compared to the acquisition time of each projection, this method provides a way to compensate for the drift by applying 2D in-plane translations to the radiographs. Here we show that this compensation may be extended to the regime of high-magnification, high-cone-angle CT experiments where source drift perpendicular to the detector plane can cause significant magnification changes throughout the acquisition.
© 2011 Optical Society of America
Original Manuscript: October 13, 2011
Manuscript Accepted: October 31, 2011
Published: December 15, 2011
Vol. 7, Iss. 2 Virtual Journal for Biomedical Optics
Glenn R. Myers, Andrew M. Kingston, Trond K. Varslot, and Adrian P. Sheppard, "Extending reference scan drift correction to high-magnification high-cone-angle tomography," Opt. Lett. 36, 4809-4811 (2011)