Selective examination of the large branches of the arch of the aorta with the help of a new triiodinated angiographic contrast material (iodamide 420).

The selective angiography of the large branches of the arch of the aorta was performed on 25 patients using Iodamide 420 as contrast medium. In 24 cases the quality of the recordings was excallent, in one case it was qualified assessable. The contrast medium caused no complication.

[Chromosomal changes following irradiation with small doses (author's transl)].

The authors examined the chromosomes of 20 patients who underwent thyroid investigations. Leucocyte cultures from peripheral blood were studied immediately before the indtroduction of 131I, and again after 48 hours. The results indicate that a total body dose of 0.