Projection correlation based noise reduction in volume CT

Hao Yan, Xuanqin Mou

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

2 Scopus citations

Abstract

De-noising algorithms for volume CT are proposed based on the correlation of the cone beam (CB) CT projections. The main idea is: when the correlated pixels among the neighboring views are added together according to this projection correlation (PC), the signal will be retained, whereas the noise variance upon them will be reduced by this averaging process, because the signal obeys this correlation but noise not. PC based filtering (PCF) method is developed. PCF is further integrated as PC based penalty weighted least square (PC-PWLS) method. Validations are performed for two volume scans: one is ideal low-dose case, and the other considers the high-frequency scatter residues after scatter correction. By using the proposed methods, significant noise suppressing is illustrated; meanwhile, the spatial resolution can be well preserved. For the low dose scan, SNR (Signal to Noise Ratio) increases are around 14 dB. For the cone beam scan with high frequency scatter residues, an effect approaching to the fan-beam scan is achieved.

Original languageEnglish (US)
Title of host publicationIEEE Nuclear Science Symposuim and Medical Imaging Conference, NSS/MIC 2010
Pages2948-2953
Number of pages6
DOIs
StatePublished - Dec 1 2010
Event2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, NSS/MIC 2010 and 17th International Workshop on Room-Temperature Semiconductor X-ray and Gamma-ray Detectors, RTSD 2010 - Knoxville, TN, United States
Duration: Oct 30 2010Nov 6 2010

Publication series

NameIEEE Nuclear Science Symposium Conference Record
ISSN (Print)1095-7863

Other

Other2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, NSS/MIC 2010 and 17th International Workshop on Room-Temperature Semiconductor X-ray and Gamma-ray Detectors, RTSD 2010
CountryUnited States
CityKnoxville, TN
Period10/30/1011/6/10

    Fingerprint

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging

Cite this

Yan, H., & Mou, X. (2010). Projection correlation based noise reduction in volume CT. In IEEE Nuclear Science Symposuim and Medical Imaging Conference, NSS/MIC 2010 (pp. 2948-2953). [5874336] (IEEE Nuclear Science Symposium Conference Record). https://doi.org/10.1109/NSSMIC.2010.5874336