Abstract
Hybrid PET-MR scanners acquire multi-modal signals simultaneously, eliminating the requirement of software alignment between the MR and PET imaging data. However, the acquisition of high-resolution MR and PET images requires long scanning times, therefore movement of the subject during the acquisition deteriorates both the PET and the MR images. In this work we have developed an approach for tightly integrated PET-MR imaging, making use of volumetric MR navigators to inform, in real-time, both the MR acquisition and the PET reconstruction. The integrated imaging procedure that we describe exploits the simultaneity of MR and PET in hybrid PET-MR systems, producing inherently-aligned motion-free MR and PET images. We describe the system setup, the algorithm for motion-corrected reconstruction, an adaptive sinogram binning algorithm and software design decisions aimed at integrating tightly the MR and PET subsystems. Application of the integrated motion-corrected acquisition procedure to a phantom study and to a volunteer subject demonstrates the validity of the approach for a variety of motion patterns.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsReferences
der Van Kouwe, A.J., et al.: Real-time rigid body motion correction and shimming using cloverleaf navigators. MRM 56(5), 1019–1032 (2006)
Tisdall, M.D., et al.: Volumetric navigators for prospective motion correction and selective reacquisition in neuroanatomical MRI. MRM 68(2), 389–399 (2012)
Thesen, S., et al.: Prospective acquisition correction for head motion with image-based tracking for real-time fMRI. Magn. Reson. Med. 44(3), 457–465 (2000)
Green, P.J.: Bayesian reconstructions from emission tomography data using a modified EM algorithm. IEEE TMI 9(1), 84–93 (1990)
Boyd, S., Parikh, N., Chu, E., Peleato, B., Eckstein, J.: Distributed optimization and statistical learning via the alternating direction method of multipliers. Found. Trends. Mach. Learn. 3(1), 1–122 (2012)
Watson, et al.: A single scatter simulation technique for scatter correction in 3D PET. Three-Dimensional Image Reconstr. Radiol. Nucl. Med. 4, 68–255 (1996)
Acknowledgments
This research was supported by the NIH NCRR (P41-RR14075), the NIH NIBIB (R01EB013565), and TEKES (ComBrain).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2015 Springer International Publishing Switzerland
About this chapter
Cite this chapter
Pedemonte, S., Catana, C., Van Leemput, K. (2015). 4-D PET-MR with Volumetric Navigators and Compressed Sensing. In: Gao, F., Shi, K., Li, S. (eds) Computational Methods for Molecular Imaging. Lecture Notes in Computational Vision and Biomechanics, vol 22. Springer, Cham. https://doi.org/10.1007/978-3-319-18431-9_10
Download citation
DOI: https://doi.org/10.1007/978-3-319-18431-9_10
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-18430-2
Online ISBN: 978-3-319-18431-9
eBook Packages: EngineeringEngineering (R0)