For the last two years, every examination of the mastoid regions made in our department at the Charity Hospital has consisted of two roentgenograms: a lateral oblique view made in the Law1 position, and a petrous bone view made in the Arcelin2 position.
To obtain a good petrous bone view, the head must be placed in such a position that the petrous bone will lie parallel to the film, and the roentgen rays must pass through it at that angle which will free the shadow of the petrous bone from the shadows of the cervical spine and maxilla.
In a previous article, I3 described a new device and technic which have enabled me to obtain roentgenograms of excellent uniformity and to duplicate these whenever necessary. For the benefit of those who have not read this article and to save them the trouble of looking it up, I
GRANGER A. NEW POSITION FOR MAKING ROENTGENOGRAMS OF THE MASTOIDS. JAMA. 1927;88(6):372–376. doi:10.1001/jama.1927.02680320008002
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