Improved Scatter Correction in X-Ray Cone Beam CT with Moving Beam Stop Array Using Johns' Equation

In this paper, an improved scatter correction with moving beam stop array (BSA) for x-ray cone beam (CB) CT is proposed. Firstly, correlation between neighboring CB views is deduced based on John's Equation. Then, correlation-based algorithm is presented to complement the incomplete views by using the redundancy (over-determined information) in CB projections. Finally, combining the algorithm with scatter correction method using moving BSA, where part of primary radiation is blocked and incomplete projections are acquired, an improved correction method is proposed. Effectiveness and robustness is validated by Monte Carlo (MC) simulation with EGSnrc on humanoid phantom.

[1]  Radhe Mohan,et al.  Scatter kernel estimation with an edge-spread function method for cone-beam computed tomography imaging , 2008, Physics in medicine and biology.

[2]  Xiaochuan Pan,et al.  Anniversary Paper: Development of x-ray computed tomography: The role of Medical Physics and AAPM from the 1970s to present. , 2008, Medical physics.

[3]  J. Dinten,et al.  A new method for x-ray scatter correction: first assessment on a cone-beam CT experimental setup , 2007, Physics in medicine and biology.

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

[5]  W. Kalender,et al.  Combining deterministic and Monte Carlo calculations for fast estimation of scatter intensities in CT , 2006, Physics in medicine and biology.

[6]  Freek J. Beekman,et al.  Efficient Monte Carlo based scatter artifact reduction in cone-beam micro-CT , 2006, IEEE Transactions on Medical Imaging.

[7]  S. Richard,et al.  A simple, direct method for x-ray scatter estimation and correction in digital radiography and cone-beam CT. , 2005, Medical physics.

[8]  Xuanqin Mou,et al.  X-ray projection simulation based on physical imaging model , 2006 .

[9]  Lei Zhu,et al.  X-ray scatter correction for cone-beam CT using moving blocker array , 2005, SPIE Medical Imaging.

[10]  F J Beekman,et al.  Experimental validation of a rapid Monte Carlo based micro-CT simulator. , 2004, Physics in medicine and biology.

[11]  Freek J. Beekman,et al.  Accelerated simulation of cone beam X-ray scatter projections , 2004, IEEE Transactions on Medical Imaging.

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

[13]  Hiroyuki Kudo,et al.  Improved two-dimensional rebinning of helical cone-beam computerized tomography data using John's equation , 2003 .

[14]  Hiroyuki Kudo,et al.  Improved two-dimensional rebinning of helical cone-beam computerized tomography data using John’s equation , 2003 .

[15]  Sarah K. Patch,et al.  Computation of unmeasured third-generation VCT views from measured views , 2002, IEEE Transactions on Medical Imaging.

[16]  P B Hoffer,et al.  Computerized three-dimensional segmented human anatomy. , 1994, Medical physics.

[17]  R. Kruger,et al.  Scatter estimation for a digital radiographic system using convolution filtering. , 1987, Medical physics.

[18]  L. Feldkamp,et al.  Practical cone-beam algorithm , 1984 .