Gain of KL-domain adaptive FBP image reconstruction for 4-D dynamic CT

Jing Wang, Tianfang Li, Hongbing Lu, Zhengrong Liang

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

3 Citations (Scopus)

Abstract

Four-dimensional dynamic computed tomography (4D-dCT) plays an important role in radiation treatment planning, delivery, and verification for lung cancer management, in addition to heart studies. 4D-dCT acquires multiple repeated measurements from the same patient. Therefore, the radiation dose during a 4D-dCT procedure is much higher than a routine 3D CT study. Low-dose scans for 4D-dCT is needed. In this work, a new reconstruction strategy is proposed to address the noise problem associated with low-dose dynamic CT scans. It first applies the Karhunen-Loève (KL) transform to the neighboring phases of 4D-dCT noise sinogram to consider the data correlation along the time dimension. In the KL domain, the independent 3D principal components are arranged according to their signal-to-noise ratios (which are reflected by their eigenvalues). It then adapts the filtered backprojection (FBP) algorithm to reconstruct each principal component in the KL domain, where the filter's cutoff frequency is adaptive to the eigenvalue of the corresponding KL component. Finally, the 4D-dCT image is obtained by inverse KL transform. A patient study was performed to demonstrate the effectiveness of the proposed strategy with comparison to a direct FBP reconstruction which does not consider the correlation or employ the KL transform. The gain of the KL-domain adaptive FBP reconstruction was measured quantitatively by noise-resolution tradeoff study.

Original languageEnglish (US)
Title of host publicationIEEE Nuclear Science Symposium Conference Record
Pages3512-3517
Number of pages6
Volume5
DOIs
StatePublished - 2007
Event2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC - Honolulu, HI, United States
Duration: Oct 27 2007Nov 3 2007

Other

Other2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
CountryUnited States
CityHonolulu, HI
Period10/27/0711/3/07

Fingerprint

Image reconstruction
Computerized tomography
Cutoff frequency
Dosimetry
Tomography
Signal to noise ratio
Radiation
Planning

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Industrial and Manufacturing Engineering

Cite this

Wang, J., Li, T., Lu, H., & Liang, Z. (2007). Gain of KL-domain adaptive FBP image reconstruction for 4-D dynamic CT. In IEEE Nuclear Science Symposium Conference Record (Vol. 5, pp. 3512-3517). [4436886] https://doi.org/10.1109/NSSMIC.2007.4436886

Gain of KL-domain adaptive FBP image reconstruction for 4-D dynamic CT. / Wang, Jing; Li, Tianfang; Lu, Hongbing; Liang, Zhengrong.

IEEE Nuclear Science Symposium Conference Record. Vol. 5 2007. p. 3512-3517 4436886.

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

Wang, J, Li, T, Lu, H & Liang, Z 2007, Gain of KL-domain adaptive FBP image reconstruction for 4-D dynamic CT. in IEEE Nuclear Science Symposium Conference Record. vol. 5, 4436886, pp. 3512-3517, 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC, Honolulu, HI, United States, 10/27/07. https://doi.org/10.1109/NSSMIC.2007.4436886
Wang J, Li T, Lu H, Liang Z. Gain of KL-domain adaptive FBP image reconstruction for 4-D dynamic CT. In IEEE Nuclear Science Symposium Conference Record. Vol. 5. 2007. p. 3512-3517. 4436886 https://doi.org/10.1109/NSSMIC.2007.4436886
Wang, Jing ; Li, Tianfang ; Lu, Hongbing ; Liang, Zhengrong. / Gain of KL-domain adaptive FBP image reconstruction for 4-D dynamic CT. IEEE Nuclear Science Symposium Conference Record. Vol. 5 2007. pp. 3512-3517
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