Tomographic Measurement and Reconstruction Techniques

Buchmann, Mathias; Mewes, Dieter

doi:10.1007/978-3-642-56443-7_15

Cited by 4 publications

(3 citation statements)

References 66 publications

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“…• combination of temperature measurements by liquid crystals with high speed video technique [19]; • optical and electrical probes for the evaluation of the distribution of vapour/liquid interphase combined with the measurement by micro thermocouples [6]; • tomography [20]; • counting of deposits or little holes on the surface evoked by nucleation sites [21].…”

Section: Review Of Evaluation Methods For Bubble Formation In Literaturementioning

confidence: 99%

High speed video recording of bubble formation with pool boiling

Luke

Cheng

2006

International Journal of Thermal Sciences

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Section: Review Of Evaluation Methods For Bubble Formation In Literaturementioning

confidence: 99%

High speed video recording of bubble formation with pool boiling

Luke

Cheng

2006

International Journal of Thermal Sciences

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“…Beam hardening results from the increased attenuation of low energy X-rays compared to high energy X-rays, while scattering, which becomes more dominant as the physical density of the target material increases [2], results from physical interactions of X-rays with the target volume. Typical approaches to correct the pseudo-enhancement effect approximate the PEH as an inplane (two-dimensional) spatially-variant kernel blurring over high attenuation (intensity) regions [3].…”

Section: Pseudo Enhancement Effect In Ct Colonographymentioning

confidence: 99%

Fast pseudo-enhancement correction in CT colonography using linear shift-invariant filters

Boyes

Slabaugh

Beddoe

2009

2009 16th IEEE International Conference on Image Processing (ICIP)

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This is the accepted version of the paper.This version of the publication may differ from the final published version. ABSTRACT This paper presents a novel method to approximate shiftvariant Gaussian filtering of an image using a set of shiftinvariant Gaussian filters. This approximation affords filtering of the image using fast convolution techniques that rely on the FFT, while achieving a result that closely matches the shift-variant result. We demonstrate the method in a CT colonography application that reduces the pseudoenhancement effect, which is a local brightening artifact in CT imaging that can result from the use of oral contrast agents. Experimental results demonstrate the effectiveness of the method and emphasize its computational efficiency. Permanent

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“…In this way, the spatial resolution of the tomographic image is limited by the size of the collimators which is larger than that of a detector. When adopting the fan-beam arrangement, however, the projections of the fan-beam illumination in a view can be obtained using one source and multiple detectors [22,23]. The distance between two neighboring detectors can be reduced to about the size of a photodiode, which contributes to greatly improving the spatial resolution.…”

Section: Introductionmentioning

confidence: 99%

Development of a fan-beam TDLAS-based tomographic sensor for rapid imaging of temperature and gas concentration

Liu¹,

Xu²,

Chen³

et al. 2015

Opt. Express

119

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This work aims to develop a fan-beam tomographic sensor using tunable diode lasers that can simultaneously image temperature and gas concentration with both high spatial and temporal resolutions. The sensor features three key advantages. First, the sensor bases on a stationary fan-beam arrangement, by which a high spatial resolution is guaranteed because the distance between two neighboring detectors in a view is approximately reduced to the size of a photodiode. Second, fan-beam illumination from five views is simultaneously generated instead of rotating either the fanned beams or the target, which significantly enhances the temporal resolution. Third, a novel set of optics with the combination of anamorphic prism pair and cylindrical lens is designed, which greatly improves the uniformity of the planar beams, and hence improves the reconstruction fidelity. This paper reports the tomographic model, optics design, numerical simulation and experimental validation of the sensor. The sensor exhibits good applicability for flame monitoring and combustion diagnosis.

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Tomographic Measurement and Reconstruction Techniques

Cited by 4 publications

References 66 publications

High speed video recording of bubble formation with pool boiling

High speed video recording of bubble formation with pool boiling

Fast pseudo-enhancement correction in CT colonography using linear shift-invariant filters

Development of a fan-beam TDLAS-based tomographic sensor for rapid imaging of temperature and gas concentration

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