The visual passage through solid matter is enabled with diagnostic scanning, which effortlessly and non-invasively penetrates solid material, entering into and passing through tissue without disturbing its composition - leaving no trace of its passage. Tomography is a generic term for scanning technologies that enable seeing into solids in a sequence of image slices, including MRI, computed axial tomography (CAT), and positron emission tomography (PET). While these technologies were developed for specific medical functions, artists have recognized the huge ontological potential of seeing inside a physical body or object. As Ron Burnett points out in How Images Think: ‘if the arts and sciences share anything at the beginning of the twenty-first century, it is the legacy of making a great deal of what has been invisible about the world and the way people live in it, visible … definitions of reality have undergone a sea of change.’ (Burnett, 2004, p. 58). In its ability to see material as data, tomography blurs the boundaries between virtual and actual realities.
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