PERL, T Roentgenologically controlled placement of the needle in the trigeminal root for the treatment of tic douloureux. [electronic resource] - The American journal of roentgenology, radium therapy, and nuclear medicine Nov 1959 - 830-9 p. digital Publication Type: Journal Article ISSN: 0002-9580 Subjects--Topical Terms: HumansNeedlesTics--therapyTrigeminal Neuralgia