Abstract
The application of computed tomography (CT) in the field of cultural heritage is no new concept and widely applied mainly by usage of medical or industrial CT systems. Nevertheless, CT setups based on conventional X-ray tubes with energy spectra up to 600 kV face several limitations considering the overall maximum specimen dimension due to the available foot print of the CT system and therefore scanning volume (approx. < 1 m x 1 m x 1m), object weight (load limit of the manipulation system, usually < 100 kg) and material properties, e.g. highly absorbing metal components. To overcome these boundaries High Energy CT systems with a linear accelerator (linac) radiation source with up to 9 MeV spectra prove to be a successful tool to push the limits of conventional CT and to provide a comprehensive extension for a new class of cultural heritage objects. In this paper, we demonstrate the beneficial application of high-energy photons for the digitization of historic objects and artifacts, as well as strategies for democratizing access to this still expensive but valuable technology for digital preservation, research and exhibition.
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