X-ray scatter correction algorithm for cone beam CT imaging

Developing and optimizing an x-ray scatter control and reduction technique is one of the major challenges for cone beam computed tomography (CBCT) because CBCT will be much less immune to scatter than fan-beam CT. X-ray scatter reduces image contrast, increases image noise and introduces reconstruct...

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Bibliographic Details
Published in:Medical physics (Lancaster) 2004-05, Vol.31 (5), p.1195-1202
Main Authors: Ning, Ruola, Tang, Xiangyang, Conover, David
Format: Article
Language:English
Subjects:
Algorithms
antiscatter grid
Computed radiography
Computed tomography
computerised tomography
Cone beam computed tomography
cone beam CT
cone beam reconstruction
flat panel detector
Humans
Image analysis
Image quality
image reconstruction
image scanners
image sensors
image sequences
Medical image contrast
Medical image noise
medical image processing
Medical image reconstruction
Medical imaging
Medical X‐ray imaging
phantoms
Phantoms, Imaging
Radiographic Image Enhancement - methods
Radiographic Image Interpretation, Computer-Assisted - methods
Radiography, Thoracic - instrumentation
Radiography, Thoracic - methods
Reproducibility of Results
scatter
scatter correction
Scattering, Radiation
Sensitivity and Specificity
Tomography, Spiral Computed - methods
X-Rays
X‐ray imaging
X‐ray scattering
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Summary:Developing and optimizing an x-ray scatter control and reduction technique is one of the major challenges for cone beam computed tomography (CBCT) because CBCT will be much less immune to scatter than fan-beam CT. X-ray scatter reduces image contrast, increases image noise and introduces reconstruction error into CBCT. To reduce scatter interference, a practical algorithm that is based upon the beam stop array technique and image sequence processing has been developed on a flat panel detector-based CBCT prototype scanner. This paper presents a beam stop array-based scatter correction algorithm and the evaluation results through phantom studies. The results indicate that the beam stop array-based scatter correction algorithm is practical and effective to reduce and correct x-ray scatter for a CBCT imaging task.
ISSN:0094-2405
2473-4209
DOI:10.1118/1.1711475