[논문]Enhancement of soft-tissue contrast in cone-beam CT using an anti-scatter grid with a sparse sampling approach

Cho, Sanghoon; Lim, Sunho; Kim, Changhwan; Wi, Sunhee; Kwon, Taejin; Youn, Won Sik; Lee, Sang Hyun; Kang, Bo Sun; Cho, Seungryong

doi:10.1016/j.ejmp.2020.01.004

[해외논문] Enhancement of soft-tissue contrast in cone-beam CT using an anti-scatter grid with a sparse sampling approach

Physica medica : European journal of medical physics, v.70, 2020년, pp.1 - 9

Cho, Sanghoon (Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST)) , Lim, Sunho (Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST)) , Kim, Changhwan (Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST)) , Wi, Sunhee (Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST)) , Kwon, Taejin (Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST)) , Youn, Won Sik (Department of Research & Development, JPI Healthcare, Co., Ltd.) , Lee, Sang Hyun (Department of Research & Development, JPI Healthcare, Co., Ltd.) , Kang, Bo Sun (Department of Radiological Science, Konyang University) , Cho, Seungryong (Department of Nuclear and Quantum Engineering, Korea Advanced Institute)

Abstract ▼ AI-Helper

Abstract Purpose Anti-scatter grids suppress the scatter substantially thus improving image contrast in radiography. However, its active use in cone-beam CT for the purpose of improving contrast-to-noise ratio (CNR) has not been successful mainly due to the increased noise related to Poisson statistics of photons. This paper proposes a sparse-view scanning approach to address the above issue. Method Compared to the conventional cone-beam CT imaging framework, the proposed method reduces the number of projections and increases exposure in each projection to enhance image quality without an additional cost of radiation dose to patients. For image reconstruction from sparse-view data, an adaptive-steepest-descent projection-onto-convex-sets (ASD POCS) algorithm regularized by total-variation (TV) minimization was adopted. Contrast and CNR with various scattering conditions were evaluated in projection domain by a simulation study using GATE. Then we evaluated contrast, resolution, and image uniformity in CT image domain with Catphan phantom. A head phantom with soft-tissue structures was also employed for demonstrating a realistic application. A virtual grid-based estimation and reduction of scatter has also been implemented for comparison with the real anti-scatter grid. Results In the projection domain evaluation, contrast and CNR enhancement was observed when using an anti-scatter grid compared to the virtual grid. In the CT image domain, the proposed method produced substantially higher contrast and CNR of the low-contrast structures with much improved image uniformity. Conclusion We have shown that the proposed method can provide high-quality CBCT images particularly with an increased contrast of soft-tissue at a neutral dose for image-guidance. Highlights Use of anti-scatter grids with high grid-ratio in CBCT is justified. Sparse-view CBCT scanning is desirable when using such grids. Exposure per view needs to be increased to balance the noise. The proposed method increases low-contrast visibility in CBCT.

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참고문헌 (31)

Med Phys Siewerdsen 28 2 220 2000 10.1118/1.1339879 Cone-beam computed tomography with a flat-panel imager: magnitude and effects of x-ray scatter

상세보기
Med Phys Siewerdsen 27 8 1903 2000 10.1118/1.1286590 Optimization of x-ray imaging geometry (with specific application to flat-panel cone-beam computed tomography)

상세보기
Phys Med Biol Sun 55 6695 2010 10.1088/0031-9155/55/22/007 Improved scatter correction using adaptive scatter kernel superposition

상세보기
Med Phys Ning 31 5 1195 2004 10.1118/1.1711475 X-ray scatter correction algorithm for cone beam CT imaging

상세보기
Phys Med Biol Poludniowski 54 3847 2009 10.1088/0031-9155/54/12/016 An efficient Monte-Carlo algorithm for scatter correction in keV cone-beam CT

상세보기
Phys Med Biol Kim 60 5971 2015 10.1088/0031-9155/60/15/5971 Data consistency-driven scatter kernel optimization for x-ray cone-beam CT

상세보기
10.1117/12.465628 Ning R, Tang X, Conover DL. “X-ray scatter suppression algorithm for cone-beam volume CT,” Proc. SPIE Med. Imag. pp. 774-781, 2002.
10.1118/1.2148916 Siewerdsen JH, Daly MJ, Bakhtiar B, Moseley DJ, Richard S, Keller H, Jaffray DA. “A simple, direct method for x-ray scatter estimation and correction in digital radiography and cone-beam CT,” Med. Phy. 33(1), pp. 187-197.

상세보기
Microsyst Technol Tang 4 187 1998 10.1007/s005420050128 Anti-scattering X-ray grid

상세보기
Proc SPIE Med Image Whiting 4682 53 2002 10.1117/12.465601 Signal statistics in x-ray computed tomography
Proc SPIE Med Image Whiting 3336 260 1998 10.1117/12.317025 Image quantization: statistics and modeling
Med Phys Siewerdsen 31 12 3506 2004 10.1118/1.1819789 The influence of antiscatter grids on soft-tissue detectability in cone-beam computed tomography with flat-panel detectors

상세보기
Proc SPIE Med Image Singh 9033 2014 Limitations of anti-scatter grids when used with high resolution image detectors
Med Phys Schafer 39 1 153 2012 10.1118/1.3666947 Antiscatter grids in mobile C-arm cone-beam CT: effect on image quality and dose

상세보기
Med Phys Abbas 40 11 2013 10.1118/1.4825096 Effects of sparse sampling schemes on image quality in low-dose CT

상세보기
IEEE Trans Nucl Sci Lee 63 5 2540 2016 10.1109/TNS.2016.2604343 Moving beam-blocker-based low-dose cone-beam CT

상세보기
IEEE Trans Med Image Lee 36 12 2578 2017 10.1109/TMI.2017.2765760 A feasibility study of low-dose single-scan dual-energy cone-beam CT in many-view under-sampling framework

상세보기
IEEE Nucl Sci Conf Rec Sidky 5 2904 2006 Accurate image reconstruction in circular cone-beam computed tomography by total variation minimization: a preliminary investigation
Phys Med Biol Persson 46 853 2001 10.1088/0031-9155/46/3/318 Total variation norm for three-dimensional iterative reconstruction in limited view angle tomography

상세보기
IEEE Nucl Sci Conf Rec Sidky 5 3526 2007 Image reconstruction from few views by non-convex optimization
Phys Med Biol Sidky 53 17 119 2006 Image reconstruction in circular cone-beam computed tomography by constrained, total-variation minimization
Appl Math Optim Grasmair 62 3 323 2010 10.1007/s00245-010-9105-x Anisotropic total variation filtering

상세보기
Phys Med Biol Chen 58 2119 2013 10.1088/0031-9155/58/7/2119 A limited-angle CT reconstruction method based on anisotropic TV minimization

상세보기
The Phantom Laboratory, “Catphan 500 and 600 manual,” Salem, NY, The Phantom Laboratory, 2006.
J Opt Soc Am A Feldkamp 1 612 1984 10.1364/JOSAA.1.000612 Practical cone-beam algorithm

상세보기
IEEE Comput Vis Pattern Recogn Buades 2005 A non-local algorithm for image denoising
Med Phys Samei 46 11 e735 2019 10.1002/mp.13763 Performance evaluation of computed tomography systems: summary of AAPM Task Group 233

상세보기
Med Phys Alexeev 45 2 529 2018 10.1002/mp.12724 Two-dimensional antiscatter grid: a novel scatter rejection device for Cone-beam computed tomography

상세보기
IEEE Trans Rad Plas Med Sci Lee 3 2 109 2019 10.1109/TRPMS.2018.2867611 Deep-neural-network based sinogram synthesis for sparse-view CT image reconstruction

상세보기
Han Y, Yoo J, Ye JC. “Deep residual learning for compressed sensing CT reconstruction via persistent homology analysis.” [Online]. Available: https://arxiv.org/abs/1611.06391, 2016.
J Nondestruct Eval Maier 37 3 57 2018 10.1007/s10921-018-0507-z Deep scatter estimation (DSE): accurate real-time scatter estimation for X-ray CT using a deep convolutional neural network

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DOI : 10.1016/j.ejmp.2020.01.004
Elsevier : 저널 > 논문

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