I claim, the ornamental design for a computer tomography apparatus, as shown and described.
FIG. 1 is the front perspective view of a computer tomography apparatus showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a side elevation view thereof;
FIG. 5 is another side elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a partially enlarged view of FIG. 1 that is included to more clearly depict the part A of FIG. 1.
The broken lines illustrating portions of the computer tomography apparatus are for environmental purposes only and form no part of the claimed design.