Simultaneous Dose Reduction and Scatter Correction for 4D Cone-Beam Computed Tomography

Cong Zhao, Yuncheng Zhong, Jing Wang, Mingwu Jin

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

1 Citation (Scopus)

Abstract

Four dimensional (4D) X-ray cone-beam computed tomography (CBCT) can lead to a precise radiation therapy through accurate tumor motion modeling. However, the repeated use of 4D CBCT in a fractional treatment session raises the concern of radiation dose. In addition, the scatter contamination results in shading artifacts and low contrast in reconstructed images if not corrected. In this work, we propose a novel method to use a moving blocker (MB) to achieve the dose reduction and scatter correction simultaneously for 4D CBCT, termed 'MB4D'. The lead blocker is placed between the X-ray source and the patient and moving back and forth in a certain direction during the CBCT data collection. Not only is part of radiation blocked, but also the scatter signal can be estimated from the blocked region for scatter correction (SC). The spatial total variation (TV) minimization and motion correlations are used to improve 4D reconstruction with incomplete data and to derive the motion fields. As an initial test of this novel method, we used a simulation study using the 4D non-uniform rational B-spline cardiac-torso (NCAT) phantom. Our results show that with 1/3 dose reduction the proposed MB-4D method can achieve much better image quality than 3D reconstruction with SC ('MB-3D') and 4D reconstruction without SC ('4D'), measured by structural similarity (SSIM) index, root mean square error (RMSE) of CT numbers, and time attenuation coefficient (TAC) curves.

Original languageEnglish (US)
Title of host publication2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538622827
DOIs
StatePublished - Nov 12 2018
Event2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Atlanta, United States
Duration: Oct 21 2017Oct 28 2017

Other

Other2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017
CountryUnited States
CityAtlanta
Period10/21/1710/28/17

Fingerprint

Cone-Beam Computed Tomography
Tomography
Cones
cones
tomography
dosage
X Ray Tomography
Radiation
torso
Moving and Lifting Patients
Torso
X rays
root-mean-square errors
Radiotherapy
attenuation coefficients
splines
radiation
Mean square error
Splines
Artifacts

ASJC Scopus subject areas

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

Cite this

Zhao, C., Zhong, Y., Wang, J., & Jin, M. (2018). Simultaneous Dose Reduction and Scatter Correction for 4D Cone-Beam Computed Tomography. In 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings [8532916] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NSSMIC.2017.8532916

Simultaneous Dose Reduction and Scatter Correction for 4D Cone-Beam Computed Tomography. / Zhao, Cong; Zhong, Yuncheng; Wang, Jing; Jin, Mingwu.

2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings. Institute of Electrical and Electronics Engineers Inc., 2018. 8532916.

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

Zhao, C, Zhong, Y, Wang, J & Jin, M 2018, Simultaneous Dose Reduction and Scatter Correction for 4D Cone-Beam Computed Tomography. in 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings., 8532916, Institute of Electrical and Electronics Engineers Inc., 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017, Atlanta, United States, 10/21/17. https://doi.org/10.1109/NSSMIC.2017.8532916
Zhao C, Zhong Y, Wang J, Jin M. Simultaneous Dose Reduction and Scatter Correction for 4D Cone-Beam Computed Tomography. In 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings. Institute of Electrical and Electronics Engineers Inc. 2018. 8532916 https://doi.org/10.1109/NSSMIC.2017.8532916
Zhao, Cong ; Zhong, Yuncheng ; Wang, Jing ; Jin, Mingwu. / Simultaneous Dose Reduction and Scatter Correction for 4D Cone-Beam Computed Tomography. 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings. Institute of Electrical and Electronics Engineers Inc., 2018.
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