Based on a followup study of graduates from a two-year training program for Physician Assistants in Diagnostic Radiology (PA-DR) at the University of Kentucky Medical Center, results are presented of an evaluation of the first year of postgraduate work activities of the initial two classes (twelve students) in nine different radiological work environments. Data summaries are presented under four headings representing four characteristics of the PA-DRs' performance: (1) work activity time measurements; (2) type and number of examinations conducted and films screened; (3) economic impact; and (4) acceptability to professional associates and to patients. Focus was not only on assessment of the success of the program, but also on the technical competency of the graduates and on whether they were employed in a manner consonant with their training. Conclusions listed include the following: PA-DRs devoted a high percentage of their time to activities which were in keeping with their training; their employment by a radiologist is financially worthwhile; the PA-DRs's on the average saved thirty-four percent of a radiologist's time; and their acceptability by professional colleagues remarkably high. The statement of overall assessment is that the activities of PA-DRs improved the utilization of radiologic manpower. Data tables and the rating report are appended. (VB)