Scatter measurement and correction method for cone-beam CT based on single grating scan

Abstract. In cone-beam computed tomography (CBCT) systems based on flat-panel detector imaging, the presence of scatter significantly reduces the quality of slices. Based on the concept of collimation, this paper presents a scatter measurement and correction method based on single grating scan. First, according to the characteristics of CBCT imaging, the scan method using single grating and the design requirements of the grating are analyzed and figured out. Second, by analyzing the composition of object projection images and object-and-grating projection images, the processing method for the scatter image at single projection angle is proposed. In addition, to avoid additional scan, this paper proposes an angle interpolation method of scatter images to reduce scan cost. Finally, the experimental results show that the scatter images obtained by this method are accurate and reliable, and the effect of scatter correction is obvious. When the additional object-and-grating projection images are collected and interpolated at intervals of 30 deg, the scatter correction error of slices can still be controlled within 3%.

[1]  D. Tisseur,et al.  Scattering correction using continuously thickness-adapted kernels , 2016 .

[2]  Dinghua Zhang,et al.  Robust scatter correction method for cone-beam CT using an interlacing-slit plate* , 2015, 1512.08308.

[3]  Hao Yan,et al.  A practical cone-beam CT scatter correction method with optimized Monte Carlo simulations for image-guided radiation therapy , 2015, Physics in medicine and biology.

[4]  J Yorkston,et al.  High-fidelity artifact correction for cone-beam CT imaging of the brain , 2015, Physics in medicine and biology.

[5]  G. Bootsma,et al.  Efficient scatter distribution estimation and correction in CBCT using concurrent Monte Carlo fitting. , 2014, Medical physics.

[6]  Zhang Liang,et al.  Scatter correction method for cone-beam CT based on interlacing-slit scan , 2014 .

[7]  M. Plamondon,et al.  Correction algorithm for environmental scattering in industrial computed tomography , 2014 .

[8]  Ernesto Mainegra-Hing,et al.  Patient-specific scatter correction in clinical cone beam computed tomography imaging made possible by the combination of Monte Carlo simulations and a ray tracing algorithm , 2013, Acta oncologica.

[9]  Jinyoung Kim,et al.  Template-based defect detection of a brazed heat exchanger using an x-ray image , 2013 .

[10]  Lei Xing,et al.  Single-scan patient-specific scatter correction in computed tomography using peripheral detection of scatter and compressed sensing scatter retrieval. , 2012, Medical physics.

[11]  A. M. Coates,et al.  A comparison of image quality and radiation dose between a cellular grid and a linear grid using a mammography phantom , 2012 .

[12]  K. Stierstorfer,et al.  Scatter Correction Method by Temporal Primary Modulation in X-Ray CT , 2012, IEEE Transactions on Nuclear Science.

[13]  Dayu Xiao,et al.  A new x-ray scatter correction method based on BAG for cone beam CT , 2012, 2012 IEEE International Conference on Information and Automation.

[14]  Lei Zhu,et al.  Scatter correction for full-fan volumetric CT using a stationary beam blocker in a single full scan. , 2011, Medical physics.

[15]  Qiong Xu,et al.  Data consistency condition-based beam-hardening correction , 2011 .

[16]  F Verhaegen,et al.  The effects of compensator and imaging geometry on the distribution of x-ray scatter in CBCT. , 2011, Medical physics.

[17]  Matthias Goldammer,et al.  Comparison between beam-stop and beam-hole array scatter correction techniques for industrial X-ray cone-beam CT , 2011 .

[18]  Jing Wang,et al.  Scatter correction for cone-beam computed tomography using moving blocker strips , 2010, Medical Imaging.

[19]  M. Ay,et al.  Monte Carlo study of scattered radiation in variable resolution X-ray CT scanner , 2010, 2010 17th Iranian Conference of Biomedical Engineering (ICBME).

[20]  N. R. Bennett,et al.  Scatter correction method for x-ray CT using primary modulation: phantom studies. , 2010, Medical physics.

[21]  Lei Zhu,et al.  Scatter correction for cone-beam CT in radiation therapy. , 2009 .

[22]  Xi Chen,et al.  Iterative scatter correction for x-ray cone-beam CT with semi-transparent beam stop array , 2009, Medical Imaging.

[23]  Lei Zhu,et al.  Scatter Correction Method for X-Ray CT Using Primary Modulation: Theory and Preliminary Results , 2006, IEEE Transactions on Medical Imaging.

[24]  Matthias Bertram,et al.  Model based scatter correction for cone-beam computed tomography , 2005, SPIE Medical Imaging.

[25]  Ruola Ning,et al.  X-ray scatter correction algorithm for cone beam CT imaging. , 2004, Medical physics.

[26]  Luo Li-min.  Scatter Correction for Cone Beam CT Using Attenuation Baffle , 2011 .

[27]  D. Hristov,et al.  Cone beam X-ray scatter removal via image frequency modulation and filtering , 2005, 2005 IEEE Engineering in Medicine and Biology 27th Annual Conference.