Spatial-temporal total variation regularization (STTVR) for 4D-CT reconstruction

Wu H, Maier A, Fahrig R, Hornegger J (2012)

Publication Type: Conference contribution, Conference Contribution

Publication year: 2012

Journal

Progress in Biomedical Optics and Imaging - Proceedings of SPIE

Original Authors: Wu H., Maier A., Fahrig R., Hornegger J.

Book Volume: 8313

Pages Range: -

Event location: San Diego, CA

Journal Issue: null

DOI: 10.1117/12.911162

Abstract

Four dimensional computed tomography (4D-CT) is very important for treatment planning in thorax or abdomen area, e.g. for guiding radiation therapy planning. The respiratory motion makes the reconstruction problem illposed. Recently, compressed sensing theory was introduced. It uses sparsity as a prior to solve the problem and improves image quality considerably. However, the images at each phase are reconstructed individually. The correlations between neighboring phases are not considered in the reconstruction process. In this paper, we propose the spatial-temporal total variation regularization (STTVR) method which not only employs the sparsity in the spatial domain but also in the temporal domain. The algorithm is validated with XCAT thorax phantom. The Euclidean norm of the reconstructed image and ground truth is calculated for evaluation. The results indicate that our method improves the reconstruction quality by more than 50% compared to standard ART. © 2012 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

Authors with CRIS profile

Haibo Wu Lehrstuhl für Informatik 14 (Bild- und Sprachverarbeitung) Andreas Maier Lehrstuhl für Informatik 5 (Mustererkennung) Joachim Hornegger Lehrstuhl für Informatik 14 (Bild- und Sprachverarbeitung)

Involved external institutions

Stanford University US United States (USA) (US)

How to cite

APA:

Wu, H., Maier, A., Fahrig, R., & Hornegger, J. (2012). Spatial-temporal total variation regularization (STTVR) for 4D-CT reconstruction. In Proceedings of the Medical Imaging 2012: Physics of Medical Imaging (pp. -). San Diego, CA.

MLA:

Wu, Haibo, et al. "Spatial-temporal total variation regularization (STTVR) for 4D-CT reconstruction." Proceedings of the Medical Imaging 2012: Physics of Medical Imaging, San Diego, CA 2012. -.

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