Detection of simulated chest lesions by using soft-copy reading: Comparison of an amorphous silicon flat-panel-detector system and a storage-phosphor system

Jin Mo Goo, Jung Gi Im, Hyun Ju Lee, Myung Jin Chung, Joon Beom Seo, Hyae Young Kim, Yu Jin Lee, Joon Won Kang, Jong Hyo Kim

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

PURPOSE: To compare observer performance by using soft-copy images produced by an amorphous silicon flat-panel-detector system and a storage-phosphor system for the detection of simulated chest lesions. MATERIALS AND METHODS: To test the diagnostic performance of these two systems, four types of simulated lesions (nodules, micronodules, lines, and reticular opacities) were superimposed over an anthropomorphic chest phantom. Digital chest radiographs were acquired with amorphous silicon flat-panel-detector (3-K [K = 1,000] matrix, 12 bits) and storage-phosphor radiography (4-K matrix, 10 bits). Six board-certified radiologists evaluated soft-copy images on a high-resolution video monitor (2,048 × 2,560 × 8 bits). A total of 14,400 observations were analyzed in terms of receiver operating characteristics. RESULTS: Average performance in terms of nodule detection was significantly better (P < .05) with the flat-panel-detector system than with the storage-phosphor system. For micronodules, lines, and reticular opacities, no significant detection differences in averaged performance were found between the two detector systems. CONCLUSION: In the evaluation of soft-copy images, the amorphous silicon detector system appears to be superior to the storage-phosphor system for the detection of pulmonary nodules.

Original languageEnglish
Pages (from-to)242-246
Number of pages5
JournalRadiology
Volume224
Issue number1
DOIs
StatePublished - 1 Jan 2002

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Silicon
Reading
Thorax
Routine Diagnostic Tests
Radiography
ROC Curve
Lung

Keywords

  • Phantoms
  • Radiography, comparative studies
  • Radiography, digital
  • Radiography, flat panel
  • Thorax, radiography

Cite this

Goo, Jin Mo ; Im, Jung Gi ; Lee, Hyun Ju ; Chung, Myung Jin ; Seo, Joon Beom ; Kim, Hyae Young ; Lee, Yu Jin ; Kang, Joon Won ; Kim, Jong Hyo. / Detection of simulated chest lesions by using soft-copy reading : Comparison of an amorphous silicon flat-panel-detector system and a storage-phosphor system. In: Radiology. 2002 ; Vol. 224, No. 1. pp. 242-246.
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Detection of simulated chest lesions by using soft-copy reading : Comparison of an amorphous silicon flat-panel-detector system and a storage-phosphor system. / Goo, Jin Mo; Im, Jung Gi; Lee, Hyun Ju; Chung, Myung Jin; Seo, Joon Beom; Kim, Hyae Young; Lee, Yu Jin; Kang, Joon Won; Kim, Jong Hyo.

In: Radiology, Vol. 224, No. 1, 01.01.2002, p. 242-246.

Research output: Contribution to journalArticle

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T2 - Comparison of an amorphous silicon flat-panel-detector system and a storage-phosphor system

AU - Goo, Jin Mo

AU - Im, Jung Gi

AU - Lee, Hyun Ju

AU - Chung, Myung Jin

AU - Seo, Joon Beom

AU - Kim, Hyae Young

AU - Lee, Yu Jin

AU - Kang, Joon Won

AU - Kim, Jong Hyo

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N2 - PURPOSE: To compare observer performance by using soft-copy images produced by an amorphous silicon flat-panel-detector system and a storage-phosphor system for the detection of simulated chest lesions. MATERIALS AND METHODS: To test the diagnostic performance of these two systems, four types of simulated lesions (nodules, micronodules, lines, and reticular opacities) were superimposed over an anthropomorphic chest phantom. Digital chest radiographs were acquired with amorphous silicon flat-panel-detector (3-K [K = 1,000] matrix, 12 bits) and storage-phosphor radiography (4-K matrix, 10 bits). Six board-certified radiologists evaluated soft-copy images on a high-resolution video monitor (2,048 × 2,560 × 8 bits). A total of 14,400 observations were analyzed in terms of receiver operating characteristics. RESULTS: Average performance in terms of nodule detection was significantly better (P < .05) with the flat-panel-detector system than with the storage-phosphor system. For micronodules, lines, and reticular opacities, no significant detection differences in averaged performance were found between the two detector systems. CONCLUSION: In the evaluation of soft-copy images, the amorphous silicon detector system appears to be superior to the storage-phosphor system for the detection of pulmonary nodules.

AB - PURPOSE: To compare observer performance by using soft-copy images produced by an amorphous silicon flat-panel-detector system and a storage-phosphor system for the detection of simulated chest lesions. MATERIALS AND METHODS: To test the diagnostic performance of these two systems, four types of simulated lesions (nodules, micronodules, lines, and reticular opacities) were superimposed over an anthropomorphic chest phantom. Digital chest radiographs were acquired with amorphous silicon flat-panel-detector (3-K [K = 1,000] matrix, 12 bits) and storage-phosphor radiography (4-K matrix, 10 bits). Six board-certified radiologists evaluated soft-copy images on a high-resolution video monitor (2,048 × 2,560 × 8 bits). A total of 14,400 observations were analyzed in terms of receiver operating characteristics. RESULTS: Average performance in terms of nodule detection was significantly better (P < .05) with the flat-panel-detector system than with the storage-phosphor system. For micronodules, lines, and reticular opacities, no significant detection differences in averaged performance were found between the two detector systems. CONCLUSION: In the evaluation of soft-copy images, the amorphous silicon detector system appears to be superior to the storage-phosphor system for the detection of pulmonary nodules.

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