Reliability of Wood Transmission Structures Through Nondestructive Evaluation

Bodig, Jozsef; Phillips, Gregory E.; Goodman, James R.; Landers, Phillip G.

doi:10.1109/tpas.1982.317599

Cited by 7 publications

(2 citation statements)

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“…Tomikawa et al applied ultrasonic time-of-flight (TOF) computed tomography (CT) to wooden pillars. 1) In previous reports [2][3][4][5] on the nondestructive inspection of wooden pillars using ultrasound, the filtered back-projection (FBP) method, a well-known existing algorithm, was adopted to reconstruct CT images from incomplete TOF profiles. The FBP algorithm was modified to reconstruct CT images from incomplete TOF profiles of wood by Yanagida et al 6) However, the reconstructed image of FBP has a problem of the emergence of negative pixel values.…”

Section: Introductionmentioning

confidence: 99%

Image Quality Improvement of Ultrasonic Computed Tomography on the Basis of Maximum Likelihood Expectation Maximization Algorithm Considering Anisotropic Acoustic Property and Time-of-Flight Interpolation

Fan¹,

Yanagida²,

Tamura³

et al. 2010

Jpn. J. Appl. Phys.

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The anisotropic acoustic property is considered for the purpose of improving the image quality of the ultrasonic computed tomography (CT) scans of a wooden pillar. We propose a velocity anisotropy correction method of time-of-flight (TOF) data for image reconstruction on the basis of the maximum likelihood-expectation maximization (ML-EM) method. We also examine the effect of the interpolation of the TOF data as the density of the TOF data has a considerable effect on image quality in the ML-EM method. The feasibility of velocity anisotropy correction and TOF data interpolation are examined in detail using numerical and wood phantoms.

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Section: Introductionmentioning

confidence: 99%

Image Quality Improvement of Ultrasonic Computed Tomography on the Basis of Maximum Likelihood Expectation Maximization Algorithm Considering Anisotropic Acoustic Property and Time-of-Flight Interpolation

Fan¹,

Yanagida²,

Tamura³

et al. 2010

Jpn. J. Appl. Phys.

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“…There are some reports on the nondestructive inspection of wood using ultrasound. [1][2][3][4][5] In a previous study, Tomikawa et al applied ultrasonic time-of-flight (TOF) computed tomography (CT) to wood. 2) Tamura et al developed an imaging process using an incomplete ultrasound profile.…”

Section: Introductionmentioning

confidence: 99%

Development of Ultrasonic Time-of-Flight Computed Tomography for Hard Wood with Anisotropic Acoustic Property

Yanagida

Tamura

Kim

et al. 2007

jjap

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Applying perturbative QCD, we study the process B c ! D s in the technicolor with a massless scalar doublet model (TCMLSM). There are mainly two mechanisms contributing to the B c ! D s process. One proceeds through the short distance b ! s transition and the other through weak annihilation accompanied by a photon emission. We nd that, compared with the standard model, the modi cation of B c ! D s from p (the physical pions in the TCMLSM) is so small that can beneglected for the allowed mass of p . The weak-annihilation contribution is found to beabout one order larger than that of the electromagnetic penguin diagrams.PACS numb e r s :12.15. Lk, 12.60.Nz, 13.30.Eg

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Survival Prediction for Wood Pole Utility Structures

Goodman

Bodig

1987

Probabilistic Methods Applied to Electric Power Systems

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Reliability of Wood Transmission Structures Through Nondestructive Evaluation

Cited by 7 publications

References 0 publications

Image Quality Improvement of Ultrasonic Computed Tomography on the Basis of Maximum Likelihood Expectation Maximization Algorithm Considering Anisotropic Acoustic Property and Time-of-Flight Interpolation

Image Quality Improvement of Ultrasonic Computed Tomography on the Basis of Maximum Likelihood Expectation Maximization Algorithm Considering Anisotropic Acoustic Property and Time-of-Flight Interpolation

Development of Ultrasonic Time-of-Flight Computed Tomography for Hard Wood with Anisotropic Acoustic Property

Survival Prediction for Wood Pole Utility Structures

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