WE-AB-207A-08: BEST IN PHYSICS (IMAGING): Advanced Scatter Correction and Iterative Reconstruction for Improved Cone-Beam CT Imaging On the TrueBeam Radiotherapy Machine

2016 ◽  
Vol 43 (6Part39) ◽  
pp. 3799-3799 ◽  
Author(s):  
A Wang ◽  
P Paysan ◽  
M Brehm ◽  
A Maslowski ◽  
M Lehmann ◽  
...  
Keyword(s):  
Iterative Reconstruction ◽  
Cone Beam Ct ◽  
Scatter Correction ◽  
Ct Imaging ◽  
Cone Beam

X-ray scatter correction algorithm for cone beam CT imaging

2004 ◽  
Vol 31 (5) ◽  
pp. 1195-1202 ◽  
Author(s):  
Ruola Ning ◽  
Xiangyang Tang ◽  
David Conover
Keyword(s):  
Cone Beam Ct ◽  
Scatter Correction ◽  
Ct Imaging ◽  
Cone Beam ◽  
Correction Algorithm ◽  
X Ray

OC-0231 MEGAVOLTAGE X-RAY SCATTER CORRECTION FOR SIMULTANEOUS CONE-BEAM CT IMAGING DURING VMAT DELIVERY

2012 ◽  
Vol 103 ◽  
pp. S91
Author(s):  
C.J. Boylan ◽  
T.E. Marchant ◽  
J. Stratford ◽  
J. Rodgers ◽  
J. Malik ◽  
...  
Keyword(s):  
Cone Beam Ct ◽  
Scatter Correction ◽  
Ct Imaging ◽  
Cone Beam ◽  
X Ray

Patient-specific scatter correction for flat-panel detector-based cone-beam CT imaging

2015 ◽  
Vol 60 (3) ◽  
pp. 1339-1365 ◽  
Author(s):  
Wei Zhao ◽  
Stephen Brunner ◽  
Kai Niu ◽  
Sebastian Schafer ◽  
Kevin Royalty ◽  
...  
Keyword(s):  
Cone Beam Ct ◽  
Scatter Correction ◽  
Ct Imaging ◽  
Cone Beam ◽  
Patient Specific ◽  
Flat Panel ◽  
Flat Panel Detector

Iterative reconstruction for image enhancement and dose reduction in diagnostic cone beam CT imaging

2019 ◽  
Vol 27 (5) ◽  
pp. 805-819 ◽  
Author(s):  
Dmitri Matenine ◽  
Matthieu Schmittbuhl ◽  
Stéphane Bedwani ◽  
Philippe Després ◽  
Jacques A. de Guise
Keyword(s):  
Dose Reduction ◽  
Image Enhancement ◽  
Iterative Reconstruction ◽  
Cone Beam Ct ◽  
Ct Imaging ◽  
Cone Beam

Potential of iterative reconstruction for maxillofacial cone beam CT imaging: technical note

2020 ◽  
Vol 62 (11) ◽  
pp. 1511-1514
Author(s):  
Dmitri Matenine ◽  
Marc Kachelriess ◽  
Philippe Després ◽  
Jacques A. de Guise ◽  
Matthieu Schmittbuhl
Keyword(s):  
Iterative Reconstruction ◽  
Cone Beam Ct ◽  
Ct Imaging ◽  
Technical Note ◽  
Cone Beam

scholarly journals Low-Dose and Scatter-Free Cone-Beam CT Imaging Using a Stationary Beam Blocker in a Single Scan: Phantom Studies

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Xue Dong ◽  
Michael Petrongolo ◽  
Tianye Niu ◽  
Lei Zhu
Keyword(s):  
Iterative Reconstruction ◽  
Low Dose ◽  
Cone Beam Ct ◽  
Scatter Correction ◽  
Cone Beam ◽  
Projection Data ◽  
Reconstruction Algorithms ◽  
Ct Number ◽  
Combine Measurement ◽  
Full Scan

Excessive imaging dose from repeated scans and poor image quality mainly due to scatter contamination are the two bottlenecks of cone-beam CT (CBCT) imaging. Compressed sensing (CS) reconstruction algorithms show promises in recovering faithful signals from low-dose projection data but do not serve well the needs of accurate CBCT imaging if effective scatter correction is not in place. Scatter can be accurately measured and removed using measurement-based methods. However, these approaches are considered unpractical in the conventional FDK reconstruction, due to the inevitable primary loss for scatter measurement. We combine measurement-based scatter correction and CS-based iterative reconstruction to generate scatter-free images from low-dose projections. We distribute blocked areas on the detector where primary signals are considered redundant in a full scan. Scatter distribution is estimated by interpolating/extrapolating measured scatter samples inside blocked areas. CS-based iterative reconstruction is finally carried out on the undersampled data to obtain scatter-free and low-dose CBCT images. With only 25% of conventional full-scan dose, our method reduces the average CT number error from 250 HU to 24 HU and increases the contrast by a factor of 2.1 on Catphan 600 phantom. On an anthropomorphic head phantom, the average CT number error is reduced from 224 HU to 10 HU in the central uniform area.

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