scholarly journals A Direct Sinogram Correction Method to Reduce Metal-Related Beam-Hardening in Computed Tomography

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 128828-128836 ◽  
Author(s):  
Sung Min Lee ◽  
Taigyntuya Bayaraa ◽  
Hosan Jeong ◽  
Chang Min Hyun ◽  
Jin Keun Seo
Keyword(s):  
Computed Tomography ◽  
Correction Method ◽  
Beam Hardening

scholarly journals An Innovative Beam Hardening Correction Method for Computed Tomography Systems

2019 ◽  
Vol 36 (6) ◽  
pp. 515-520 ◽  
Author(s):  
Guoyi Xiu ◽  
Chunying Yuan ◽  
Xiaohua Chen ◽  
Xuesong Li
Keyword(s):  
Computed Tomography ◽  
Correction Method ◽  
Beam Hardening ◽  
Beam Hardening Correction

Robust Beam Hardening Artifacts Reduction for Computed Tomography Using Spectrum Modeling

2019 ◽  
Vol 5 (2) ◽  
pp. 333-342 ◽  
Author(s):  
Wei Zhao ◽  
Dengwang Li ◽  
Kai Niu ◽  
Wenjian Qin ◽  
Hao Peng ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Beam Hardening ◽  
Artifacts Reduction ◽  
Spectrum Modeling

Computed tomography: beam hardening and environmental density artifact.

Radiology ◽  
1983 ◽  
Vol 148 (1) ◽  
pp. 279-283 ◽  
Author(s):  
S W Young ◽  
H H Muller ◽  
W H Marshall
Keyword(s):  
Computed Tomography ◽  
Beam Hardening

Abstract 17600: Improved Iterative Reconstruction Reduces Artifacts and Results in Larger Measurements of Ileofemoral Artery Size on Computed Tomography in Patients Referred for Transcatheter Aortic Valve Replacement

Circulation ◽  
2015 ◽  
Vol 132 (suppl_3) ◽  
Author(s):  
Anum Minhas ◽  
Smita Patel ◽  
Ella Kazerooni ◽  
Antonio Conte ◽  
Troy Labounty
Keyword(s):  
Computed Tomography ◽  
Image Quality ◽  
Aortic Valve ◽  
Aortic Valve Replacement ◽  
Valve Replacement ◽  
Iterative Reconstruction ◽  
Transcatheter Aortic Valve Replacement ◽  
Beam Hardening ◽  
Transcatheter Aortic Valve ◽  
Blinded Reader

Background: Computed tomography (CT) is typically used to measure ileofemoral artery size in patients considered for transcatheter aortic valve replacement (TAVR). However, these patients often have significant arterial calcification, which can introduce artifacts and limit measurement accuracy. We hypothesized that improved iterative reconstruction would improve image quality and reduce artifacts, resulting in larger measured size. Methods: We examined 56 patients undergoing CT for possible TAVR, and compared image quality and ileofemoral arterial size between separate reconstructions of the same studies, comparing standard (STD) advanced statistical iterative reconstruction and improved model-based iterative reconstruction (MBIR). A blinded reader identified the sites with the smallest luminal diameter, and provided identical short-axis reformats for both reconstructions. A separate blinded reader graded image quality and made measurements in a random sequence. We compared mean and minimal diameters, image quality (1 poor, 4 excellent), and signal and noise. Results: Mean age was 77 ± 10 years and 54% were male. Table 1 compares measured diameters and image quality between STD and MBIR reconstructions. Between STD and MBIR images, ≥moderate beam-hardening artifacts were observed in 30% (17/56) and 9% (5/56) of patients, respectively (p=0.008); severe artifacts were seen in 23% (13/56) and 5% (3/56) of patients, respectively (p=0.01). Overall image quality of STD and MBIR images was graded as good or excellent in 70% (39/56) and 91% (51/56) of cases, respectively (p=0.008). Conclusion: In patients referred for TAVR, improved iterative reconstruction resulted in higher image quality, fewer beam-hardening artifacts, and larger measurements of ileofemoral artery size.

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