Abstract: The data transfer for cranial computerized tomography images is substantially form-fitting and dome-shaped. First and second groups of elongated depth markers are positioned in front and in back, diametrically across from each other, and each depth marker extends from the peripheral edge of the cap toward the apex of the cap, the markers are positioned parallel to one another and each marker is graduated in length and terminates at its upper end in an enlargement. A plurality of longitudinal or circumferential markers are positioned between the first and second groups of depth markers and also extend from the peripheral edge of the cap toward the apex of the cap.