Grid versus non-grid techniques for the detection of pulmonary nodules in a chest phantom

E. E. Christensen, G. W. Dietz, R. C. Murry, E. M. Stokely, J. G. Moore

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

A partial chest phantom was constructed to compare two commonly employed radiographic techniques, 70 kVp without a grid and 120 kVp with a grid, for the detection of pulmonary nodules. The phantom consisted of human ribs embedded in paraffin, the lungs of a dog injected with silicone rubber, a tissue equivalent wax heart and beeswax nodules. The nodules ranged in size from 3-7 mm. A series of 120 films was exposed, half with each technique, and the films were interpreted by three senior residents and seven staff radiologists. More nodules of all sizes except 3 mm were detected with the 120 kVp technique. The 3 mm nodules were rarely detected with cither technique. The disadvantages of the 120 kVp technique were an approximate 50 percent increase in patient exposures and almost twice as many false-positive nodule detections.

Original languageEnglish (US)
Pages (from-to)462-464
Number of pages3
JournalInvestigative Radiology
Volume12
Issue number5
DOIs
StatePublished - Jan 1 1977

Keywords

  • Chest phantom
  • Radiographic technique

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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    Christensen, E. E., Dietz, G. W., Murry, R. C., Stokely, E. M., & Moore, J. G. (1977). Grid versus non-grid techniques for the detection of pulmonary nodules in a chest phantom. Investigative Radiology, 12(5), 462-464. https://doi.org/10.1097/00004424-197709000-00006