The transverse diameter of the chest on routine radiographs reliably estimates gestational age and weight in premature infants

Kelly R. Dietz, Lei Zhang, Frank G. Seidel

Research output: Contribution to journalArticle

Abstract

Background: Prior to digital radiography it was possible for a radiologist to easily estimate the size of a patient on an analog film. Because variable magnification may be applied at the time of processing an image, it is now more difficult to visually estimate an infant’s size on the monitor. Since gestational age and weight significantly impact the differential diagnosis of neonatal diseases and determine the expected size of kidneys or appearance of the brain by MRI or US, this information is useful to a pediatric radiologist. Although this information may be present in the electronic medical record, it is frequently not readily available to the pediatric radiologist at the time of image interpretation. Objective: To determine if there was a correlation between gestational age and weight of a premature infant with their transverse chest diameter (rib to rib) on admission chest radiographs. Materials and methods: This retrospective study was approved by the institutional review board, which waived informed consent. The maximum transverse chest diameter outer rib to outer rib was measured on admission portable chest radiographs of 464 patients admitted to the neonatal intensive care unit (NICU) during the 2010 calendar year. Regression analysis was used to investigate the association between chest diameter and gestational age/birth weight. Quadratic term of chest diameter was used in the regression model. Results: Chest diameter was statistically significantly associated with both gestational age (P < 0.0001) and birth weight (P < 0.0001). Conclusion: An infant’s gestational age and birth weight can be reliably estimated by comparing a simple measurement of the transverse chest diameter on digital chest radiograph with the tables and graphs in our study.

Original languageEnglish (US)
Pages (from-to)1303-1307
Number of pages5
JournalPediatric Radiology
Volume45
Issue number9
DOIs
StatePublished - Aug 7 2015

Keywords

  • Birth weight
  • Chest
  • Gestational age
  • Neonate
  • Premature infant
  • Radiography

Fingerprint Dive into the research topics of 'The transverse diameter of the chest on routine radiographs reliably estimates gestational age and weight in premature infants'. Together they form a unique fingerprint.

  • Cite this