Background: The portable chest X-ray in infants hospitalized in neonatal intensive care units is one of the most common diagnostic procedures. Every child during hospitalization period may be incurred over a number of portable chest radiography examinations. Optimization of the infant position for radiography results in the improved diagnostic quality of radiographs.
Objective: To evaluate rotation factor during pediatric portable chest radiography; the present study examined the effect of two different methods to stabilize infant position during radiography on the incidence of rotation.
Materials and methods: This is an interventional study with nonequivalent groups in which rotation factor was evaluated on 250 portable chest radiography on fields of newborns admitted to NICUs (in two intervention and control groups), by comparing the length of posterior ribs on both sides of the chest. In this study, 176 radiographs were related to infants from three university hospitals so that sandbags or patients accompany had been used to stabilize the position of the patient, and 74 radiographs were for infants referred to an academic center whose positions had been stabilized during X-ray using body immobilizer.
Results: The mean difference between the length of right and left posterior ribs in infants stabilized with the usual method (sandbags or patients accompanies) was obtained 6.51Â±5.05 mm. This statistical index for the second group of infants whose positions had been stabilized through body immobilizer was 2.87Â±2.15mm. Independent t-test showed a significant difference between the two groups in terms of the difference in the quantity of rotation. In this study, the difference in the length of posterior ribs over 5 mm was found as detectable rotation in the images.
Conclusion: The infant position during radiography can be improved considerably by using proper body immobilizer, and repeating the tests can be avoided due to the inappropriate position. By means of such an instrument, there is no need for the help of accompanies or personnel to stabilize infant position, and their exposure will be prevented.