Objective: The purpose of the authors’ study is to evaluate the correlation between the size of the right descending pulmonary artery and the body mass index in the chest radiograph.

Materials and Methods: A total of 363 patients undergone chest radiograph examination were included in the present study. The subjects were aged between 18 and 20 years with no underlying disease, no previous surgical history, no abnormal physical examination, normal laboratory results, and normal chest radiograph. In present study, the posteroanterior chest radiograph was evaluated. The right descending pulmonary artery size was measured. The correlation between right descending pulmonary artery and body mass index, weight and height were calculated by means of Pearson’s correlation test.

Results: The present study suggested that the size of right descending pulmonary artery was dependent on body mass index, weight and height.

Conclusion: This outcome is the beginning in an effort to understand the correlation between the size of right descending pulmonary artery and body mass index. Further studies with a larger sample and a greater variety of subject demographics are required to reach a clear-cut conclusion and to establish a new accepted value as varied by body mass index for the right descending pulmonary artery.

Keywords: right descending pulmonary artery, body mass index, chest radiograph