A new weighting scheme for cone-beam helical CT to reduce the image noise

Katsuyuki Taguchi, Be Shan S. Chiang, Michael D. Silver

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


Reducing the patient dose while keeping the image noise at the same level is desired for x-ray CT examinations. In order to achieve the goal, we propose a new weighting scheme taking the validity of the data and redundant data samples into account. The method is evaluated with a new generalized version of the Feldkamp helical reconstruction algorithm. It allows us to enlarge the projection angular range used in reconstruction, and thus, to reduce the image noise by increasing the detector utilization rate to 100% without sacrificing the image quality or z-resolution. This concept can be adapted to other exact or approximate algorithms as far as they use redundant data samples.

Original languageEnglish (US)
Pages (from-to)2351-2364
Number of pages14
JournalPhysics in medicine and biology
Issue number11
StatePublished - Jun 7 2004
Externally publishedYes

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging


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