Evaluation of the ability of nonlinear noise reduction filter to the low-contrast object in Multi-Detector Row Computed Tomography using a digital phantom and power spectrum

S. Kondo, S. Goto, Y. Hyodo, T. Maruyama, Y. Azuma, R. Matsuura, K. Inamura

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

Abstract

We propose a quantitative method to evaluate the ability of adaptive image filters for reducing noise to low-contrast objects in Multi-Detector Row Computed Tomography (MDCT). The digital phantom for evaluating the ability of a nonlinear noise reduction filter to a low-contrast object in a MDCT image was produced. The digital phantom consists of a water phantom image of MDCT and a bar pattern with a known contrast and spatial frequency. The edge-preserving adaptive filter for selectively eliminating noise in low-dose scanning known as the Quantum Denoising System developed by Toshiba Medical Systems was chosen as a nonlinear noise reduction filter for this paper. In this paper, two non-linear noise reduction filters, Q1 and Q2 in QDS were employed. By analyzing the power spectrum (PS) of a digital phantom, the filter performance as regards the contrast and spatial frequency of an object was investigated. The contrast-to-noise ratio from PS could express the feature of the filter briefly. That is, the validity of a filter can be shown based on the combined information of the contrast and spatial frequency of an object. Probably, this simple method will contribute to evaluating various noise reduction filters efficiently.

Original languageEnglish
Title of host publication2011 IEEE International Conference on Imaging Systems and Techniques, IST 2011 - Proceedings
Pages160-164
Number of pages5
DOIs
Publication statusPublished - 2011
Event2011 IEEE International Conference on Imaging Systems and Techniques, IST 2011 - Batu Ferringhi, Penang, Malaysia
Duration: May 17 2011May 18 2011

Publication series

Name2011 IEEE International Conference on Imaging Systems and Techniques, IST 2011 - Proceedings

Other

Other2011 IEEE International Conference on Imaging Systems and Techniques, IST 2011
CountryMalaysia
CityBatu Ferringhi, Penang
Period5/17/115/18/11

Keywords

  • computed tomography
  • digital phantom
  • low-contrast object
  • noise reduction filter
  • power spectrum

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition

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    Kondo, S., Goto, S., Hyodo, Y., Maruyama, T., Azuma, Y., Matsuura, R., & Inamura, K. (2011). Evaluation of the ability of nonlinear noise reduction filter to the low-contrast object in Multi-Detector Row Computed Tomography using a digital phantom and power spectrum. In 2011 IEEE International Conference on Imaging Systems and Techniques, IST 2011 - Proceedings (pp. 160-164). [5962206] (2011 IEEE International Conference on Imaging Systems and Techniques, IST 2011 - Proceedings). https://doi.org/10.1109/IST.2011.5962206