Abstract
An integrative CT simulation technique is presented that creates realistic CT images of virtual fecal-tagged material that was added to given clinical DICOM CT images. The energy spectrum of the CT X-ray source, the energy-dependent attenuation, and the scattering properties of the soft tissue and tagging material were incorporated in the generation technique for the DICOM image-based virtual sinograms, followed by CT reconstruction reflecting the vendor-specific filtering kernels. Dark band artifacts were generated by appropriate combining of beam-hardening and -scattering effects into the generation procedure for the virtual sinograms. We used a set of simple numerical phantoms to assess the basic behavior of artifact production. A reference set of CTC images with and without tagging material and artifacts was used for evaluation of the realism of the simulated results. The level of realism was evaluated in terms of the artifact strength and patterns around the added tagging material, compared to real tagging images. The results showed that our CT simulation technique provides sufficient realism for virtual fecal-tagged images that reflect a chain of physical and numerical processes, including beam hardening, scattering, and vendor-specific kernel filtered backprojection. The technique presented has the potential to be used as a tool for investigating the effect of tagging materials on image quality and to gauge how well the electronic cleansing technique performs.
Access provided by Autonomous University of Puebla. Download to read the full chapter text
Chapter PDF
Similar content being viewed by others
References
McFarland, E.G., Levin, B., Lieverman, D.A., Pickhardt, P.J., Johnson, C.D., Glick, S.N., Brooks, D., Smith, R.A.: American Cancer Society, U.S. Multisociety Task Force on Colorectal Cancer, American College of Radiology: Revised Colorectal Screening Guidelines: Joint Effect of the American Cancer Society, U.S. Multisociety Task Force on Colorectal Cancer, and American College of Radiology. Radiology 248, 717–720 (2008)
Cai, W., Zalis, M.E., Näppi, J., Harris, G.J., Yoshida, H.: Structure-Analysis Method for Electronic Cleansing in Cathartic and Noncathartic CT Colonography. Med. Phys. 35, 3259–3277 (2008)
Buzug, T.M.: Computed Tomography: From Photon Statistics to Modern Cone-Beam CT. Springer, Heidelberg (2008)
Boone, J.M., Fewell, T.R., Jennings, R.J.: Molybdenum, Rhodium, and Tungsten Anode Spectral Models Using Interpolating Polynomials with Application to Mammography. Med. Phys. 24, 1863–1874 (1997)
Heismann, B.J., Leppert, J., Stierstorfer, K.: Density and Atomic Number Measurements with Spectral X-Ray Attenuation Method. J. Appl. Phys. 94, 2073–2079 (2003)
Ruhrnschopf, E.P., Klingenbeck, K.: A General Framework and Review of Scatter Correction Methods in Cone Beam CT. Part 2: Scatter Estimation Approaches. Med. Phys. 38, 5186–5199 (2011)
Hubbell, J.H., Seltzer, S.M.: Tables of X-Ray Mass Attenuation Coefficients and Mass Energy-Absorption Coefficients from 1 keV to 20 MeV for Elements Z=1 to 92 and 48 Additional Substances of Dosimetric Interest*, http://www.nist.gov/pml/data/xraycoef/index.cfm
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2012 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Yang, Z., Jin, Hm., Kim, J.H. (2012). Application of CT Simulation Technique for Virtual Fecal Tagging in CTC. In: Yoshida, H., Hawkes, D., Vannier, M.W. (eds) Abdominal Imaging. Computational and Clinical Applications. ABD-MICCAI 2012. Lecture Notes in Computer Science, vol 7601. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-33612-6_7
Download citation
DOI: https://doi.org/10.1007/978-3-642-33612-6_7
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-33611-9
Online ISBN: 978-3-642-33612-6
eBook Packages: Computer ScienceComputer Science (R0)