Time resolving gamma-tomography for periodically changing gas fraction fields and its application to an axial pump

Prasser, Horst-Michael; Baldauf, Dieter; Fietz, J.; Hampel, Uwe; Hoppe, Dietrich; Zippe, C.; Zschau, Jochen; Christen, M.; Will, Gotthard

doi:10.1016/s0955-5986(03)00010-4

Cited by 36 publications

(17 citation statements)

References 2 publications

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“…Since the photon flux of isotopic sources is limited, typically to a few hundred photons/(mm 2 s) at 1 m distance, an efficient detector design is required. In most gamma ray CT devices this has been achieved by using large Bismuth Germanate (BGO) or CsI(Tl) crystals coupled to photomultiplier tubes [14][15][16][17][18][19]. Such arrangements, however, have clear limits regarding spatial resolution.…”

Section: Introductionmentioning

confidence: 99%

Liquid flow texture analysis in trickle bed reactors using high-resolution gamma ray tomography

Schubert

Hessel

Zippe

et al. 2008

Chemical Engineering Journal

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Section: Introductionmentioning

confidence: 99%

Liquid flow texture analysis in trickle bed reactors using high-resolution gamma ray tomography

Schubert

Hessel

Zippe

et al. 2008

Chemical Engineering Journal

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“…This method was applied as a non-intrusive method to visualise the gas fraction distribution inside the rotating impeller of an axial pump delivering a two-phase flow [24]. The pump test facility is located at the Technical University of Dresden.…”

Section: Gamma Tomographymentioning

confidence: 99%

“…Good image reconstruction requires about 10 2 projections. This is achieved by counting the pulses delivered by the detectors synchronised to the rotation of the impeller [24]. One revolution of the impeller is divided into a number of equal angular intervals.…”

Section: Gamma Tomographymentioning

confidence: 99%

Novel experimental measuring techniques required to provide data for CFD validation

Prasser

2008

Nuclear Engineering and Design

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“…Concerns that remain are the required shielding and potential hazards of using radioactive and ionizing radiation, along with high costs for installation and operation. Nevertheless, X-and -ray tomography have proven to deliver excellent images in applications that are not time-critical (see, e.g., (Gehrke, Wirth, 2005;Prasser et al, 2003)). …”

Section: Hard Field Tomographymentioning

confidence: 99%

Application and data fusion of different sensor modalities in tomographic imaging

Steiner

2007

Elektrotech. Inftech.

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A crucial aspect in tomographic imaging is the choice of the sensing modality. It depends on the intended application since different sensing principles are sensitive to different physical parameters. This paper gives an overview of sensing modalities that are frequently used in industrial and medical applications. Common issues of tomographic measurement techniques are a small amount of available data and inherently ill-posed inverse problems, resulting in limited achievable reconstruction accuracy. Multimodality tomography has been proposed to partly overcome these problems by exploiting the complementarity of the sensing modalities for improved imaging performance. Data fusion approaches proposed for tomographic imaging are reviewed in this paper. The potential of multimodal tomography is illustrated by means of an application example from medical imaging.Ü berblick verschiedener Ansä tze der Sensorfusion fü r tomografische bildgebende Systeme.Ein wichtiger Aspekt bei der Anwendung tomografischer Messmethoden ist die Wahl des Sensorprinzips. Dieses hä ngt stark von der Zielanwendung ab, weil verschiedene Sensorprinzipien auf unterschiedliche physikalische Parameter empfindlich sind. Diese Arbeit gibt einen Ü berblick ü ber hä ufig verwendete Sensorprinzipien fü r industrielle und medizinische Tomografie. Ü bliche Probleme tomografischer Methoden sind geringe verfü gbare Datenmengen und inhä rent schlechtgestellte inverse Probleme, was sich in begrenzter erreichbarer Rekonstruktionsgenauigkeit auswirkt. Die Fusion verschiedener physikalischer Sensormodalitä ten ist ein Versuch, ihre komplementä ren Eigenschaften zur Erreichung einer Rekonstruktionsqualitä t auszunutzen, die mit einem einzelnen Messprinzip nicht erreichbar wä re. Diese Arbeit gibt einen Ü berblick verschiedener Ansä tze der Sensorfusion fü r tomografische bildgebende Systeme. Ein Anwendungsbeispiel illustriert die mö gliche Verbesserung der Bildqualitä t.

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Time resolving gamma-tomography for periodically changing gas fraction fields and its application to an axial pump

Cited by 36 publications

References 2 publications

Liquid flow texture analysis in trickle bed reactors using high-resolution gamma ray tomography

Liquid flow texture analysis in trickle bed reactors using high-resolution gamma ray tomography

Novel experimental measuring techniques required to provide data for CFD validation

Application and data fusion of different sensor modalities in tomographic imaging

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