Chest radiography: estimated lung volume and projected area obscured by the heart, mediastinum, and diaphragm.

Journal Article (Journal Article)

PURPOSE: To estimate what fraction of the lung volume and projected lung area are obscured by the heart, mediastinum, and diaphragm on frontal chest radiographs. MATERIALS AND METHODS: Digital images from 25 computed tomographic examinations of the chest (10-mm section thickness and spacing) were analyzed, lung regions were identified in each image section, and simulated frontal radiographs were constructed from the resultant data to estimate the obscured-volume and obscured-area fractions for each patient. Means and standard deviations of the measured lung fractions were computed. RESULTS: On average, 26.4% of the lung volume (standard deviation, 5.1) and 43.0% of the lung area (standard deviation, 6.6) were obscured. CONCLUSION: These substantial lung fractions should be considered in the selection of a screen-film system for chest radiography, because the obscured portion of the lung can be poorly imaged if an inappropriate system is chosen.

Full Text

Duke Authors

Cited Authors

  • Chotas, HG; Ravin, CE

Published Date

  • November 1994

Published In

Volume / Issue

  • 193 / 2

Start / End Page

  • 403 - 404

PubMed ID

  • 7972752

International Standard Serial Number (ISSN)

  • 0033-8419

Digital Object Identifier (DOI)

  • 10.1148/radiology.193.2.7972752


  • eng

Conference Location

  • United States