Physical priors in virtual colonoscopy

Hassan Rivaz, Yoshihisa Shinagawa, Jianming Liang

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

1 Citation (Scopus)

Abstract

Electronic colon cleansing (ECC) aims to remove the contrast agent from the CT abdominal images so that a virtual model of the colon can be constructed. Virtual colonoscopy requires either liquid or solid preparation of the colon before CT imaging. This paper has two parts to address ECC in both preparation methods. In the first part, meniscus removal in the liquid preparation is studied. The meniscus is the curve seen at the top of a liquid in response to its container. Left on the colon wall, the meniscus can decrease the sensitivity and specificity of virtual colonoscopy. We state the differential equation that governs the profile of the meniscus and propose an algorithm for calculating the boundary of the contrast agent. We compute the surface tension of the liquid-colon wall contact using in-vivo CT data. Our results show that the surface tension can be estimated with an acceptable degree of uncertainty. Such an estimate, along with the meniscus profile differential equation will be used as an a priori knowledge to aid meniscus segmentation. In the second part, we study ECC in solid preparation of colon. Since the colon is pressurized with air before acquisition of the CT images, a prior on the shape of the colon wall can be obtained. We present such prior and investigate it using patient data. We show the shape prior is held in certain parts of the colon and propose a method that uses this prior to ease pseudoenhancement correction.

Original languageEnglish (US)
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume7260
DOIs
StatePublished - 2009
EventMedical Imaging 2009: Computer-Aided Diagnosis - Lake Buena Vista, FL, United States
Duration: Feb 10 2009Feb 12 2009

Other

OtherMedical Imaging 2009: Computer-Aided Diagnosis
CountryUnited States
CityLake Buena Vista, FL
Period2/10/092/12/09

Fingerprint

Computed Tomographic Colonography
menisci
Colon
Liquids
Contrast Media
Surface tension
preparation
Differential equations
liquids
interfacial tension
differential equations
electronics
Contacts (fluid mechanics)
Containers
Surface Tension
profiles
containers
Imaging techniques
acquisition
Air

Keywords

  • CT colonography
  • Electronic colon cleansing
  • Meniscus
  • Unprepared colon
  • Virtual colonoscopy

ASJC Scopus subject areas

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

Cite this

Rivaz, H., Shinagawa, Y., & Liang, J. (2009). Physical priors in virtual colonoscopy. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE (Vol. 7260). [726019] https://doi.org/10.1117/12.813554

Physical priors in virtual colonoscopy. / Rivaz, Hassan; Shinagawa, Yoshihisa; Liang, Jianming.

Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7260 2009. 726019.

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

Rivaz, H, Shinagawa, Y & Liang, J 2009, Physical priors in virtual colonoscopy. in Progress in Biomedical Optics and Imaging - Proceedings of SPIE. vol. 7260, 726019, Medical Imaging 2009: Computer-Aided Diagnosis, Lake Buena Vista, FL, United States, 2/10/09. https://doi.org/10.1117/12.813554
Rivaz H, Shinagawa Y, Liang J. Physical priors in virtual colonoscopy. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7260. 2009. 726019 https://doi.org/10.1117/12.813554
Rivaz, Hassan ; Shinagawa, Yoshihisa ; Liang, Jianming. / Physical priors in virtual colonoscopy. Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7260 2009.
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