# Enhanced and Combined Representations in Extended Reality through Creative Industries
## 2 Related Work  
### Computed Tomography Imaging  
Cultural heritage is a field that has benefited significantly from the use and study of tomographies related to elements of archeology and cultural heritage in general [56]. The ability to provide important information through nondestructive and noninvasive methods on non-visible areas of cultural heritage objects contributes to holistic study and documentation [19; 27]. In a recent study, a sample consisting of 96 CT scans of skulls from contemporary Egyptians and 54 3D models of skulls from the Egyptian Old Kingdom Period (2700-2180 BC) were used in the sector of bioarchaeology to validate the reliability of sex classification for geographically and temporally distant skull series [57]. In a different study, [PERSON]'s mummy was re-examined to evidence the scope of combining a computerized examination of CT imaging and an image intensifier-guided needle biopsy (MIP), coupled with analytical technologies and existing Egyptological data, to extend previous understanding of her background, life events, and preparation for the afterlife [58].  
Another study provides a rigorous evaluation of the practice of producing 3D-printed replicas of animal anatomy from archaeological remains and CT scans and has shown the utility of the practice for species identification [21; 59]. Virtual unwrapping allows textual artifacts to be read completely and noninvasively, and it was applied in the case of the extremely fragile En-Gedi scroll, the oldest Pentateuchal scroll in Hebrew outside of the Dead Sea Scrolls [60]. Moreover, X-ray tomography for virtual unfolding and nondestructive access to hidden texts was applied in ancient papyrus packages from the papyrus collection of the Musee du Louvre [23]. EducLab-Scrolls combines volumetric CT scans with aligned 2D labels. Together with a software pipeline that combines machine learning (ML) with a novel geometric framework, the interconnected data and method can detect the carbon ink inside Herculaneum scrolls [61].  
Advances in 3D graphics and the capabilities offered by sophisticated processors have greatly aided the development of software packages for the study and processing of X-ray CT scans. A wide range of available software packages are available for the analysis of tomographic datasets, whether they are commercial products [62; 63; 64; 65; 66; 67; 68] or free [69; 70; 71; 72; 73; 74] software (Table 1). Different types of tomography can be imported into the specific programs, and multi-level analyses can be performed on the volumetric representations. Users are also given the ability to export 3D digital representations of joined areas or the entire object in ideal formats for further use in 3D editing programs [75]. In several cases, it is also possible to produce videos of predefined processes through the volumetric analysis program, such as for the internal overview of the geometry of an object along its axes. However, in most cases, it is necessary to use computer systems equipped with powerful graphics cards. At the same time, the handling of volumetric analysis programs requires familiarity with and basic knowledge of 3D graphics. Thus, the data related to computed tomography scans remain in limited access behind the doors of laboratories.