Application of asymmetric cone-beam CT in radiotherapy

Lifeng Yu, Charles Pelizzari, Xiaochuan Pan, Heinrich Riem, Peter Munro, Wolfgang Kaissl

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

4 Citations (Scopus)

Abstract

In many implementations of cone-beam CT in radiotherapy for target positioning, it is not uncommon that the maximum allowable field of view (FOV) cannot cover the patient because of the limited size of the flat-panel detector. In this situation, the measurements will contain truncated projections, leading to significant artifacts in reconstructed images. Asymmetric conebeam configurations can be used for increasing the FOV size by displacing the detector panel to one side. From the data acquired with such an asymmetric configuration, the well-known algorithm developed by Feldkamp, Davis, and Kress (FDK) can be modified to reconstruct images. With increasing detector asymmetry, however, the modified FDK algorithm may produce significant aliasing artifacts. In this work, we develop a novel algorithm for image reconstruction in asymmetric cone-beam CT, which can generate images with improved numerical properties and allow for large detector asymmetry. We have employed the asymmetric configuration and the developed algorithm in a cone-beam CT system in radiotherapy to increase the FOV size. Preliminary phantom studies have been conducted to validate the asymmetric configuration and the proposed reconstruction algorithm.

Original languageEnglish (US)
Title of host publicationIEEE Nuclear Science Symposium Conference Record
EditorsJ.A. Seibert
Pages3249-3252
Number of pages4
Volume5
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

Other

Other2004 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
CountryItaly
CityRome
Period10/16/0410/22/04

Fingerprint

Radiotherapy
Cones
Detectors
Image reconstruction

Keywords

  • Computed tomography (CT)
  • Cone-beam CT
  • Image reconstruction
  • Radiation therapy

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Industrial and Manufacturing Engineering

Cite this

Yu, L., Pelizzari, C., Pan, X., Riem, H., Munro, P., & Kaissl, W. (2004). Application of asymmetric cone-beam CT in radiotherapy. In J. A. Seibert (Ed.), IEEE Nuclear Science Symposium Conference Record (Vol. 5, pp. 3249-3252). [M5-458]

Application of asymmetric cone-beam CT in radiotherapy. / Yu, Lifeng; Pelizzari, Charles; Pan, Xiaochuan; Riem, Heinrich; Munro, Peter; Kaissl, Wolfgang.

IEEE Nuclear Science Symposium Conference Record. ed. / J.A. Seibert. Vol. 5 2004. p. 3249-3252 M5-458.

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

Yu, L, Pelizzari, C, Pan, X, Riem, H, Munro, P & Kaissl, W 2004, Application of asymmetric cone-beam CT in radiotherapy. in JA Seibert (ed.), IEEE Nuclear Science Symposium Conference Record. vol. 5, M5-458, pp. 3249-3252, 2004 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, 10/16/04.
Yu L, Pelizzari C, Pan X, Riem H, Munro P, Kaissl W. Application of asymmetric cone-beam CT in radiotherapy. In Seibert JA, editor, IEEE Nuclear Science Symposium Conference Record. Vol. 5. 2004. p. 3249-3252. M5-458
Yu, Lifeng ; Pelizzari, Charles ; Pan, Xiaochuan ; Riem, Heinrich ; Munro, Peter ; Kaissl, Wolfgang. / Application of asymmetric cone-beam CT in radiotherapy. IEEE Nuclear Science Symposium Conference Record. editor / J.A. Seibert. Vol. 5 2004. pp. 3249-3252
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