Terahertz tomographic imaging of XVIIIth Dynasty Egyptian sealed pottery

Caumes, Jean-Pascal; Younus, Ayesha; Salort, Simon; Chassagne, Bruno; Recur, Benoît; Ziéglé, Anne; Dautant, Alain; Abraham, Emmanuel

doi:10.1364/ao.50.003604

Cited by 39 publications

(13 citation statements)

References 17 publications

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“…51 Many techniques have been investigated for the acquisition of 3-D images at THz frequencies, including diffraction tomography, 62 use of binary lenses, 86 time-of-flight measurements in reflection mode and tomosynthesis, 87 and more recently computed tomography (CT) with ultrashort THz pulses, 52 or CW sources. 54 THz tomography competes against the longtime used Xray CT, which usually provides high spatial resolution and high contrast images. However, there are three opportunities for THz frequencies in this field.…”

Section: Medical Imagingmentioning

confidence: 99%

Review of photomixing continuous-wave terahertz systems and current application trends in terahertz domain

Safian¹,

Ghazi²,

Mohammadian

2019

Opt. Eng.

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Within the last two decades, terahertz systems have become a well-established tool in scientific laboratories and industrial research and development departments. Unlike the methods of pulsed terahertz radiation that mainly rely on ultrafast optical technology, the technology behind continuous-wave terahertz sources and detectors has a long history involving many different types of technical schemes. The intent is to provide a brief review of the continuous-wave terahertz systems that are based on photomixing and current application trends in the field of terahertz technology.

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Section: Medical Imagingmentioning

confidence: 99%

Review of photomixing continuous-wave terahertz systems and current application trends in terahertz domain

Safian¹,

Ghazi²,

Mohammadian

2019

Opt. Eng.

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“…While spectral absorption features characterize the molecular composition of a sample, the phase and polarization of THz radiation transmitted through a sample rather reveal macroscopic structural details. Due to these favorable properties, THz imaging has been applied to recent studies of historical and cultural artefacts (Adam et al, ; Caumes et al, ; Bessou et al, ).…”

Section: Introductionmentioning

confidence: 99%

Terahertz Imaging Modalities of Ancient Egyptian Mummified Objects and of a Naturally Mummified Rat

Öhrström

Fischer

Bitzer

et al. 2015

The Anatomical Record

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During the last few years, terahertz (THz) imaging has been used to investigate artwork and historic artifacts. The application of THz imaging to mummy investigations is very attractive since it provides spectroscopic information over a broad frequency range and its radiation has proven to be harmless to human cells. However, compared with the current standard imaging methods in mummy imaging-X-ray and computed tomography (CT)-it remains a novel, emerging technique whose potential still needs to be fully evaluated. Here, ancient Egyptian mummified objects as well as a naturally mummified rat have been investigated by two different THz imaging systems: a broadband THz time domain imaging system and an electronic THz scanner. The obtained THz images are compared with conventional CT, X-ray, and magnetic resonance images. While the broadband THz time domain setup permits analyses of smaller samples, the electronic THz scanner allows the recording of data of thicker and larger samples at the expense of a limited spectral bandwidth. Terahertz imaging shows clear potential for mummy investigations, although currently CT imaging offers much higher spatial resolution. Furthermore, as commercial mobile THz scanners become available, THz imaging could be applied directly in museums or at excavation sites.

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“…Terahertz technology (between 0.1 and 4 THz) is now a well-established tool to achieve contactfree and non-destructive testing (NDT) [1][2][3][4][5][6][7]. In the field of 3D imaging, X-Ray computed tomography (CT) is an omnipresent technique which provides 3D visualization of dense materials such as human bodies, biological tissues or industrial samples.…”

Section: Introductionmentioning

confidence: 99%

Ordered subsets convex algorithm for 3D terahertz transmission tomography

Recur¹,

Balacey²,

Sleiman³

et al. 2014

Opt. Express

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We investigate in this paper a new reconstruction method in order to perform 3D Terahertz (THz) tomography using a continuous wave acquisition setup in transmission mode. This method is based on the Maximum Likelihood for TRansmission tomography (ML-TR) first developed for X-ray imaging. We optimize the Ordered Subsets Convex (OSC) implementation of the ML-TR by including the Gaussian propagation model of THz waves and take into account the intensity distributions of both blank calibration scan and dark-field measured on THz detectors. THz ML-TR reconstruction quality and accuracy are discussed and compared to other tomographic reconstructions.

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Terahertz tomographic imaging of XVIIIth Dynasty Egyptian sealed pottery

Cited by 39 publications

References 17 publications

Review of photomixing continuous-wave terahertz systems and current application trends in terahertz domain

Review of photomixing continuous-wave terahertz systems and current application trends in terahertz domain

Terahertz Imaging Modalities of Ancient Egyptian Mummified Objects and of a Naturally Mummified Rat

Ordered subsets convex algorithm for 3D terahertz transmission tomography

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