An unusual image of the temporal bone due to a venous emissary in a sclerotic mastoid.

An unusual image of the temporal bone that is reminiscent of the thumb phalanges is described. This picture is due to an emissary vein in a bilaterally sclerotic mastoid with lateralization of the sigmoid sinus.

[Perspectives and limits of holographic applications in radiology (author's transl)].

Some holographic techniques such as composite holograms, Fresnel's plate, holographic filters, may be employed in radiology in order to obtain three dimensional images. The basic elements of holography are summarized and the possible applications are discussed. A practical method is presented to prepare the Fresnel's plate.