A comparative study on interpolation methods in rebinning circular fan-beam data into parallel-beam data

Sunsik Ryu, Jongduk Baek

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

Abstract

Computed Tomography (CT) scanners evolved from simple parallel-beam geometry into more complex fan-beam geometry. The rebinning mechanism to convert fan-beam projections to parallel-beam projections is one of the methods simplifying the reconstruction of the CT image. Various interpolation methods result in different numerical presentations and noisy textures in the reconstructed CT images. This paper evaluates three interpolation methods, linear, frequency domain and higher order in rebinning fan-beam data into parallel-beam data in the framework of the FBP algorithm in parallel-beam CTs. The high-contrast spatial resolution, modulation transfer function (MTF), and noise are used to quantify the image quality. The noise is expressed as the noise power spectrum (NPS) and noise variance of the reconstructed image containing only Poisson distributed noise. Our results show that the higher order interpolation, cubic-spline, is the most helpful to improve the image quality in rebinning. We further demonstrate that the rebinning data gives more satisfactory results for assessment of noise variance in comparison with the fan-beam data.

Original languageEnglish
Title of host publicationProceedings - 2014 IEEE 27th International Symposium on Computer-Based Medical Systems, CBMS 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages505-506
Number of pages2
ISBN (Print)9781479944354
DOIs
Publication statusPublished - 2014 Jan 1
Event27th IEEE International Symposium on Computer-Based Medical Systems, CBMS 2014 - New York, NY, United States
Duration: 2014 May 272014 May 29

Publication series

NameProceedings - IEEE Symposium on Computer-Based Medical Systems
ISSN (Print)1063-7125

Other

Other27th IEEE International Symposium on Computer-Based Medical Systems, CBMS 2014
CountryUnited States
CityNew York, NY
Period14/5/2714/5/29

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging
  • Computer Science Applications

Cite this

Ryu, S., & Baek, J. (2014). A comparative study on interpolation methods in rebinning circular fan-beam data into parallel-beam data. In Proceedings - 2014 IEEE 27th International Symposium on Computer-Based Medical Systems, CBMS 2014 (pp. 505-506). [6881948] (Proceedings - IEEE Symposium on Computer-Based Medical Systems). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CBMS.2014.112