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Evaluation of the usefulness of color digital summation radiography in temporally sequential digital radiographs: a phantom study

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Abstract

Purpose

The purpose of this study was to assess the usefulness of color digital summation radiography (CDSR) for detection of nodules on chest radiographs by observers with different levels of experience.

Materials and methods

A total of 30 radiographs of chest phantoms with abnormalities and 30 normal ones were arranged at random. Set A was conventional radiographs only. Set B consisted of both conventional radiographs and CDSR images, which were colored with magenta. Five chest radiologists and five residents evaluated both image sets on a TFT monitor. The observers were asked to rate each image set using a continuous rating scale. The reading time for each set was also recorded.

Results

In set A, the performance of chest radiologists was significantly superior to that of the residents (P < 0.05). However, in set B, there was no significant difference in the performance of the chest radiologists and the residents. In both observer groups, the mean reading time per case in set B was significantly shorter than that in set A (P < 0.01).

Conclusion

By using CDSR, the detection capability of observers with little experience improves and is comparable to that of experienced observers. Moreover, the reading time becomes much shorter using CDSR.

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Authors and Affiliations

  1. Department of Medical Physics, Osaka University Graduate School of Medicine, 1-7 Yamadaoka, Suita, Osaka, 565-0871, Japan

    Yuji Ogata, Takashi Ueguchi, Mitsuhiro Matsumoto & Takeshi Johkoh

  2. Department of Radiology, National Cardiovascular Center, Osaka, Japan

    Hiroaki Naito

  3. Department of Radiology, Osaka University Graduate School of Medicine, Osaka, Japan

    Noriyuki Tomiyama, Seiki Hamada, Takenori Kozuka, Mitsuhiro Koyama, Mitusko Tsubamoto, Sachiko Murai & Hironobu Nakamura

  4. Department of Medical Robotics and Image Sciences, Osaka University Graduate School of Medicine, Osaka, Japan

    Shinichi Tamura

Authors
  1. Yuji Ogata
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  2. Hiroaki Naito
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  3. Noriyuki Tomiyama
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  4. Seiki Hamada
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  5. Takenori Kozuka
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  6. Mitsuhiro Koyama
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  8. Sachiko Murai
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  9. Takashi Ueguchi
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  11. Shinichi Tamura
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  12. Hironobu Nakamura
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  13. Takeshi Johkoh
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Corresponding author

Correspondence to Yuji Ogata.

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Cite this article

Ogata, Y., Naito, H., Tomiyama, N. et al. Evaluation of the usefulness of color digital summation radiography in temporally sequential digital radiographs: a phantom study. Radiat Med 24, 182–186 (2006). https://doi.org/10.1007/s11604-005-1487-3

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  • DOI: https://doi.org/10.1007/s11604-005-1487-3

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