1. Would a better understanding of the anatomy and improvement of the method make it possible to reduce the percentage of failures sufficiently to earn selective arteriography of bronchial and intercostal arteries a place among the accepted methods of selective arteriographic investigation? 2. Can indications for such selective arteriographical investigations be formulated? The answers to these questions were considered to offer a basis for the evaluation of the clinical contribution to be expected of this method. In designing this research project, we started by making a detailed study of...