Detectability of simulated interstitial pneumonia on chest radiographs: Comparison between irradiation side sampling indirect flat-panel detector and computed radiography

Y. Yano, H. Yabuuchi, A. Kairada, N. Tanaka, J. Morishita, T. Akasaka, Y. Matsuo, T. Kamitani, Y. Yamasaki, M. Nagao, M. Sasaki

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Abstract

Objective: To compare the detectability of simulated interstitial pneumonia on chest radiographs between an irradiation side sampling indirect flat-panel detector (ISSFPD) and computed radiography (CR).

Methods: Simulated interstitial pneumonia findings (ground-glass opacity, reticular opacity and honeycomb lung) were superimposed on an anthropomorphic chest phantom. Chest radiographs were acquired under three exposure levels (4.0, 3.2 and 2.0mAs) with an ISS-FPD and with CR. 5 thoracic radiologists evaluated 72 images for the presence or absence of a lesion over each of 6 areas. A total of 1296 observations were analysed in a receiver-operating characteristic analysis. A jackknife method was used for the statistical analysis.

Results: The areas under the curves (AUCs) for the detection of simulated honeycomb lung obtained with the ISS-FPD were significantly larger than those obtained with CR at all exposure conditions. For the detection of simulated ground-glass opacity and reticular opacity, there were no significant differences between the two systems. In addition, the AUCs for the detectability of simulated honeycomb lung obtained with the ISS-FPD at all exposure levels were significantly larger than those obtained with CR at 4mAs.

Conclusion: The ISS-FPD was superior to CR for the detection of simulated honeycomb lung. Provided that the chosen model is representative of interstitial pneumonia, the use of an ISS-FPD might reduce a patient's exposure dose during the detection of interstitial pneumonia.

Advances in knowledge: The ISS-FPD has shown its advantage compared with CR in the detection of honeycombing, one sign of interstitial pneumonia.

Original languageEnglish
Article number20140075
JournalBritish Journal of Radiology
Volume87
Issue number1040
DOIs
Publication statusPublished - Aug 1 2014

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging

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