. The American journal of roentgenology, radium therapy and nuclear medicine . Fig. 7. Roentgenogram of Skull No. 36 Shown inFigs. 5 and 6. or second degree mastoiditis, in additionto the cloudiness of the cell spaces, distinctchanges in the bone structure are noted. Mastoid Stereoroentgenograms The cell walls now appear indistinct andhazy, and may disappear entirely in different types of mastoid are thepneumatic and diploic. one mastoid diploic, while the other issomewhat pneumatic. In more than thre9hundred heads roentgenographed in themastoid position, I have found only this.

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