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computed tomography

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Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006456
EISBN: 978-1-62708-190-0
... Abstract Computed tomography (CT) is an imaging technique that generates a three-dimensional (3-D) volumetric image of a test piece. This article illustrates the basic principles of CT and provides information on the types, applications, and capabilities of CT systems. A comparison...
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Published: 15 May 2022
Fig. 35 Computed tomography radiography inspection of exemplar fractured crankshaft More
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Published: 01 November 1995
Fig. 39 Computed tomography image of a 10 mm (0.4 in.) ceramic ball containing a 250 μm (10 mils) void. Image was produced using a 100 KeV source with a 50 μm (2 mils) focal spot diameter. Courtesy of Bio-Imaging Research, Inc. More
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Published: 01 January 2001
Fig. 35 Comparison of radiography and computed tomography (a) Conventional projection radiography. (b) CT using slit collimation More
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Published: 01 January 2001
Fig. 37 Computed tomography image of a graphite/epoxy woven “J”-stiffener, showing ply condition and consolidation More
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Published: 01 August 2018
Fig. 9 Computed tomography image of cast housing showing severe shrinkage and porosity More
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Published: 01 August 2018
Fig. 10 Computed tomography images of an additive manufacturing sample with residual core material and voids. More
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Published: 01 August 2018
Fig. 11 Cross-sectional computed tomography image through a turbine blade with wall thickness measurement locations and values determined with automated software More
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Published: 01 August 2018
Fig. 15 Functional block diagram of a typical computed tomography system More
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Published: 01 August 2018
Fig. 16 Automated industrial computed tomography system for the production inspection of small components. Parts-loading conveyor and cabinetized x-ray system are included in this setup. More
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Published: 01 August 2018
Fig. 17 Basic computed tomography scanning geometries. (a) Single-detector translate-rotate, first-generation system. (b) Multidetector translate-rotate, second-generation system. (c) Rotate-only (rotate-rotate), third-generation system. (d) Stationary-detector rotate-only, fourth-generation More
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Published: 01 August 2018
Fig. 18 Computed tomography and digital radiography scanner designed for the nondestructive testing and dimensional analysis of a variety of parts up to 300 mm (12 in.) in diameter and 600 mm (24 in.) in length More
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Published: 01 August 2018
Fig. 19 Industrial computed tomography system x-ray cell for the inspection of large fabricated components and castings with multiaxis parts manipulator More
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Published: 01 August 2018
Fig. 24 Computed tomography (CT) image on an industrial CT system of a resolution bar phantom. The smallest pattern has 0.005 mm (0.0002 in.) bars. The biggest one has 0.15 mm (0.006 in.) spacings. More
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Published: 01 August 2018
Fig. 26 Contrast-detail-dose diagram for two similar computed tomography systems. The resolvability is limited by system resolution for high-contrast objects and by noise for low-contrast structures. More
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Published: 01 August 2018
Fig. 27 Computed tomography image of low-contrast detectability test phantom More
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Published: 01 August 2018
Fig. 31 (a) Computed tomography (CT) image across a sample helicopter tail rotor blade showing outer fiberglass airfoil and center composite spar. (b) Planar reformation through the composite spar from a series of CT slices. The dark vertical lines are normal cloth layup boundaries, while More
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Published: 01 August 2018
Fig. 33 (a) Standard computed tomography (CT) slice of a compact disc (CD) stack illustrating cone beam artifacts near regions with planar features. (b) The same CD stack using helical CT demonstrating the removal of noticeable cone beam artifacts in the final reconstruction More
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Published: 01 August 2018
Fig. 39 (a) Standard computed tomography acquisition of a composite material with ring artifacts in the reconstructed slice. (b) The same composite material using ring artifact reduction More
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Published: 01 August 2018
Fig. 14 Schematic of computed tomography, which is the reconstruction by computer of a series of tomographic planes (slices) of an object. The transmitted intensity of the fan-shaped beam is processed by computer, and the resulting image displayed on a screen. Source: Ref 14 More