Ray contribution masks for structure adaptive sinogram filtering

IEEE Transactions on Medical Imaging
Michael BaldaBjoern Heismann

Abstract

The patient dose in computed tomography (CT) imaging is linked to measurement noise. Various noise-reduction techniques have been developed that adapt structure preserving filters like anisotropic diffusion or bilateral filters to CT noise properties. We introduce a structure adaptive sinogram (SAS) filter that incorporates the specific properties of the CT measurement process. It uses a point-based forward projector to generate a local structure representation called ray contribution mask (RCM). The similarities between neighboring RCMs are used in an enhanced variant of the bilateral filtering concept, where the photometric similarity is replaced with the structural similarity. We evaluate the performance in four different scenarios: The robustness against reconstruction artifacts is demonstrated by a scan of a high-resolution-phantom. Without changing the modulation transfer function (MTF) nor introducing artifacts, the SAS filter reduces the noise level by 13.6%. The image sharpness and noise reduction capabilities are visually assessed on in vivo patient scans and quantitatively evaluated on a simulated phantom. Unlike a standard bilateral filter, the SAS filter preserves edge information and high-frequency components of o...Continue Reading

References

Oct 1, 1978·AJR. American Journal of Roentgenology·E ChewG Di Chiro
May 1, 1987·Journal of the Optical Society of America. A, Optics and Image Science·M RabbaniR Van Metter
Dec 13, 2005·European Radiology·Thomas G FlohrBernd M Ohnesorge
Apr 13, 2006·IEEE Transactions on Medical Imaging·Arnold M R SchilhamMathias Prokop
Feb 16, 2008·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·J WeickertM A Viergever
Aug 2, 2008·IEEE Transactions on Medical Imaging·Michiel SchaapWiro J Niessen
Nov 27, 2008·IEEE Transactions on Medical Imaging·Anja BorsdorfJoachim Hornegger
Feb 25, 2009·Medical Physics·N MailD A Jaffray

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Citations

Aug 5, 2016·Computerized Medical Imaging and Graphics : the Official Journal of the Computerized Medical Imaging Society·Dong ZengJianhua Ma
Jun 18, 2017·IEEE Transactions on Medical Imaging·Hu ChenGe Wang
Feb 22, 2018·Journal of Digital Imaging·Xin Yi, Paul Babyn
Jan 1, 2017·Journal of Healthcare Engineering·Seokmin HanSang Wook Yoo
Jan 19, 2021·Journal of X-ray Science and Technology·Zhiwei FengBin Yan

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