XCAT/DRASIM: A realistic CT/human-model simulation package

George S K Fung, Karl Stierstorfer, W. Paul Segars, Katsuyuki Taguchi, Thomas G. Flohr, Benjamin Tsui

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The aim of this research is to develop a complete CT/human-model simulation package by integrating the 4D eXtended CArdiac-Torso (XCAT) phantom, a computer generated NURBS surface based phantom that provides a realistic model of human anatomy and respiratory and cardiac motions, and the DRASIM (Siemens Healthcare) CT-data simulation program. Unlike other CT simulation tools which are based on simple mathematical primitives or voxelized phantoms, this new simulation package has the advantages of utilizing a realistic model of human anatomy and physiological motions without voxelization and with accurate modeling of the characteristics of clinical Siemens CT systems. First, we incorporated the 4D XCAT anatomy and motion models into DRASIM by implementing a new library which consists of functions to read-in the NURBS surfaces of anatomical objects and their overlapping order and material properties in the XCAT phantom. Second, we incorporated an efficient ray-tracing algorithm for line integral calculation in DRASIM by computing the intersection points of the rays cast from the x-ray source to the detector elements through the NURBS surfaces of the multiple XCAT anatomical objects along the ray paths. Third, we evaluated the integrated simulation package by performing a number of sample simulations of multiple x-ray projections from different views followed by image reconstruction. The initial simulation results were found to be promising by qualitative evaluation. In conclusion, we have developed a unique CT/human-model simulation package which has great potential as a tool in the design and optimization of CT scanners, and the development of scanning protocols and image reconstruction methods for improving CT image quality and reducing radiation dose.

Original languageEnglish (US)
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume7961
DOIs
StatePublished - 2011
EventMedical Imaging 2011: Physics of Medical Imaging - Lake Buena Vista, FL, United States
Duration: Feb 13 2011Feb 17 2011

Other

OtherMedical Imaging 2011: Physics of Medical Imaging
CountryUnited States
CityLake Buena Vista, FL
Period2/13/112/17/11

Fingerprint

Anatomy
Computer-Assisted Image Processing
anatomy
Image reconstruction
simulation
X-Rays
Torso
image reconstruction
X rays
rays
Libraries
Ray tracing
torso
Image quality
Dosimetry
Radiation
Materials properties
Delivery of Health Care
x ray sources
data simulation

Keywords

  • CT simulation
  • DRASIM
  • NURBS
  • ray-tracing algorithm
  • realistic phantom
  • XCAT

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

Cite this

Fung, G. S. K., Stierstorfer, K., Segars, W. P., Taguchi, K., Flohr, T. G., & Tsui, B. (2011). XCAT/DRASIM: A realistic CT/human-model simulation package. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE (Vol. 7961). [79613D] https://doi.org/10.1117/12.878034

XCAT/DRASIM : A realistic CT/human-model simulation package. / Fung, George S K; Stierstorfer, Karl; Segars, W. Paul; Taguchi, Katsuyuki; Flohr, Thomas G.; Tsui, Benjamin.

Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7961 2011. 79613D.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Fung, GSK, Stierstorfer, K, Segars, WP, Taguchi, K, Flohr, TG & Tsui, B 2011, XCAT/DRASIM: A realistic CT/human-model simulation package. in Progress in Biomedical Optics and Imaging - Proceedings of SPIE. vol. 7961, 79613D, Medical Imaging 2011: Physics of Medical Imaging, Lake Buena Vista, FL, United States, 2/13/11. https://doi.org/10.1117/12.878034
Fung GSK, Stierstorfer K, Segars WP, Taguchi K, Flohr TG, Tsui B. XCAT/DRASIM: A realistic CT/human-model simulation package. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7961. 2011. 79613D https://doi.org/10.1117/12.878034
Fung, George S K ; Stierstorfer, Karl ; Segars, W. Paul ; Taguchi, Katsuyuki ; Flohr, Thomas G. ; Tsui, Benjamin. / XCAT/DRASIM : A realistic CT/human-model simulation package. Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7961 2011.
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