Adaptive modulation of bilateral filtering based on a practical noise model for streaking and noise reduction in multi-slice CT

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

6 Citations (Scopus)

Abstract

We have recently developed a locally-adaptive method for noise control in CT based upon bilateral filtering. Different from the previous adaptive filters, which were locally adaptive by adjusting the filter strength according to local photon statistics, our use of bilateral filtering in projection data incorporates a practical CT noise model and takes into account the local structural characteristics, and thus can preserve edge information in the projection data and maintain the spatial resolution. Despite the incorporation of the CT noise model and local structural characteristics in the bilateral filtering, the noise-resolution properties of the filtered image are still highly dependent on predefined parameters that control the weighting factors in the bilateral filtering. An inappropriate selection of these parameters may result in a loss of spatial resolution or an insufficient reduction of noise. In this work, we employed an adaptive strategy to modulate the bilateral filtering strength according to the noise-equivalent photon numbers determined from each projection measurement. We applied the proposed technique to head/neck angiographic CT exams, which had highly non-uniform attenuation levels during the scan. The results demonstrated that the technique can effectively reduce the noise and streaking artifacts caused by high attenuation, while maintaining the reconstruction accuracy in less attenuating regions.

Original languageEnglish (US)
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume7622
EditionPART 2
DOIs
StatePublished - 2010
EventMedical Imaging 2010: Physics of Medical Imaging - San Diego, CA, United States
Duration: Feb 15 2010Feb 18 2010

Other

OtherMedical Imaging 2010: Physics of Medical Imaging
CountryUnited States
CitySan Diego, CA
Period2/15/102/18/10

Fingerprint

Adaptive modulation
Noise abatement
noise reduction
Acoustic noise
Noise
modulation
projection
Photons
Acoustic variables control
spatial resolution
Adaptive filters
attenuation
adaptive filters
Structural Models
photons
Statistics
Artifacts
artifacts
Neck
adjusting

Keywords

  • Bilateral filtering
  • CT
  • Dose reduction
  • Noise reduction

ASJC Scopus subject areas

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

Cite this

Adaptive modulation of bilateral filtering based on a practical noise model for streaking and noise reduction in multi-slice CT. / Yu, Lifeng; Manduca, Armando; Jacobsen, Megan; Trazasko, Joshua D; Fletcher, Joel Garland; DeLone, David R.; McCollough, Cynthia H.

Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7622 PART 2. ed. 2010. 76222O.

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

Yu, L, Manduca, A, Jacobsen, M, Trazasko, JD, Fletcher, JG, DeLone, DR & McCollough, CH 2010, Adaptive modulation of bilateral filtering based on a practical noise model for streaking and noise reduction in multi-slice CT. in Progress in Biomedical Optics and Imaging - Proceedings of SPIE. PART 2 edn, vol. 7622, 76222O, Medical Imaging 2010: Physics of Medical Imaging, San Diego, CA, United States, 2/15/10. https://doi.org/10.1117/12.845403
Yu L, Manduca A, Jacobsen M, Trazasko JD, Fletcher JG, DeLone DR et al. Adaptive modulation of bilateral filtering based on a practical noise model for streaking and noise reduction in multi-slice CT. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE. PART 2 ed. Vol. 7622. 2010. 76222O https://doi.org/10.1117/12.845403
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