FIXLAB – 5, iTomography infrastructure

Facility type: FIXLAB

Access provider: Ormylia Foundation, Ormylia Art Diagnosis Centre

Title: iTomography infrastructure

Description

iTomography is a setup for the non-destructive scanning for cultural heritage applications with a multi-degree of freedom design, for multiple angle and distance scanning of artworks via different modalities. Various, onboard, post-processing image registration algorithms are realized for the combination of images originating on various sensors. The mechanical adaptation takes into consideration the possible mounting of various modalities onto the robotic arm, and the ability of scanning cultural objects from different angles.
A specialized acquisition and control software has been adequetly developed for the unified platform. The Ultrasonic Acquisition Application Interface (US-API) provides high-level software functionalities for controlling the utilised hardware. These, include methods for commanding and obtaining data acquisitions from a high-frequency ultrasound pulser/receiver and through a high-speed analog-to-digital converter (A/D converter) board. Furthermore, the US-API integrates methods for controlling the motion on three axes (X-Y-Z), by separately commanding three linear motor stages, which are abruptly to each other, forming a X-Y-Z (3D) motion space.

Services

iTomography is an integrated infrastructure for creating non-destructively tomographic images rom cultural heritage objects using all the available lab modalities (FTIR, UV-VIS, Raman spectroscopy, XRF, X-Ray/IR/UV fluoresce Imaging, Ultrasound). Therefore, the system provides a large bandwidth for investigation in the electromagnetic spectrum, as well as ultrasonic mapping capabilities, along with a motion control and a data acquisition and visualization tool. This setup can be applied on a wider variety of cultural heritage objects such as icons, paintings, old maps, tapestries, and, even, medium-sized statues.

Technical Info

Robotic mechanical scaffold based on Aerotech moving stages 75x75x50 mm (CNC) (step resolution => 0.5 μm) with Aerotech motion controllers SOLOIST TMP
Acoustic microscope with ultrasound transducers of 75, 100,110MHz (175MHz / resolution: ~10μm) (+ TG10-3DMD)
Acoustic microscope with phased array probes of 16-50 MHz (res:~ 30 μm)
Ultrasonic Acquisition Application Interface (US-API)
Pulser-Receiver 25, 200 and 400 MHz
Raman Spectroscopy (BWTEK i-Raman EX)
XenICs XMID-FPA-640 (IR Imaging (1-5 μm), Thermal imaging (3-5 μm))
Bruker ALPHA (IR Spectroscopy (Reflectance, Transmittance-Absorbance and ATR/FTIR systems / IR-CUBE))
Thermo Scientific™ – Niton™ XL3t GOLDD+ XRF Analyzer
Thermo Scientific™ Portable Test Stand, XL3
AVANTES AvaSpec-ULS2048LTEC with AVANTES AvaLight-D(H)-S Deuterium-Halogen Light Sources

Examples/Photos

Mechanical robotic scaffold – arm – i-Tomography system. The platform on which the modalities are affixed is mounted on the pitch rotary stage while the yaw is performed by the stage on which the artwork is placed, Ormylia Foundation ©.	Top; Hardware registration of a moving FTIR mapping image over an IR one at 2.87-5 μm wavelength region. Bottom; Hardware image registration for a distinctive detail ROI; (Left) visual and ultrasound images, (Right) visual and image via FTIR mapping, Ormylia Foundation ©.
MultiSensorial Software Platform: Automated Raman surface mapping, Ormylia Foundation ©.	The prototype iTomography infrastructure during the initiation of measurements on curved areas of a cultural heritage object, Ormylia Foundation ©.

Related Publications

- - G. Karagiannis, Th. Karamanos, Em. Athanasopoulos and K. Panayiotou, Development of an iTomography infrastructure for non-destructive documentation of cultural heritage objects, IEEE International Conference on Imaging Systems and Technologies, October 16-18, 2018, Krakow, Poland.
  - G. Karagiannis, C. Salpistis, G. Sergiadis, and Y. Chryssoulakis. “Nondestructive multispectral reflectoscopy between 800 and 1900 nm: An instrument for the investigation of the stratigraphy in paintings.” Review of scientific instruments 78, no. 6: 065112, 2007.
  - G. Karagiannis, D. Alexiadis, A. Damtsios, G. Sergiadis, and C. Salpistis. “Three-dimensional nondestructive ”sampling” of art objects using acoustic microscopy and timefrequency analysis.” IEEE Transactions on Instrumentation and Measurement 60, no. 9: 3082-3109, 2011.
  - G. Karagiannis, D. Alexiadis, G. Sergiadis, and C. Salpistis. “Processing of UV/VIS/nIR/mIR diffuse reflectance spectra and acoustic microscopy echo graphs for stratigraphy determination, using neural networks and wavelet transform.” In Information and Communication Technologies: From Theory to Applications, ICTTA 2008. 3rd International Conference on, pp. 1-7. IEEE, 2008.

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