| The bones related to the organ of hearing, the tympanis and petrous bones, are very solid and dense in structure. |
| Caudal to the temporal lobe is the petrous portion of the temporal bone and the mastoid air cells. |
| The authors studied 154 scans of the petrous temporal bone obtained by this technique. |
| From the surrounding 794 mesoderm the petrous bone is formed by a process of chondrification and ossification. |
| High density scans of the petrous bones provide the diagnosis but it is necessary to obtain a 3D view to ascertain the dehiscence. |
| Behind the temporal regions, note the two wide and deep grooves which outline the petrous parts of the temporal bones. |
