Practical hybrid convolution algorithm for helical CT reconstruction

Alexander A. Zamyatin, Katsuyuki Taguchi, Michael D. Silver

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations


Great strides have been taken in the last few years in the development of both approximate and exact reconstruction I algorithms for helical cone-beam CT. The proposed algorithm uses so-called hybrid convolution which is a sum of ramp filtering and Hubert transform of projection data. We show that it satisfies the requirements of a modern practical CT reconstruction algorithm. In this work we evaluate the new method and compare it to several previously published algorithms. We evaluate spatial resolution and noise properties, and also the cone beam artifact. Evaluation demonstrated that the proposed algorithm outperforms the helical Feldkamp algorithm and another candidate in terms of image noise-to-resolution balance, as well as the cone beam artifact We also discuss implementation issues and propose a simplified version for over-scan reconstruction.

Original languageEnglish (US)
Pages (from-to)3003-3007
Number of pages5
JournalIEEE Nuclear Science Symposium Conference Record
StatePublished - 2004
Externally publishedYes
Event2004 Nuclear Science Symposium, Medical Imaging Conference, Symposium on Nuclear Power Systems and the 14th International Workshop on Room Temperature Semiconductor X- and Gamma- Ray Detectors - Rome, Italy
Duration: Oct 16 2004Oct 22 2004

ASJC Scopus subject areas

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


Dive into the research topics of 'Practical hybrid convolution algorithm for helical CT reconstruction'. Together they form a unique fingerprint.

Cite this