Is the image quality of conventional chest radiography obtained from a two-layer flat panel detector affected by the internal structure of the detector?

Shinya Takarabe, Taku Kuramoto, Yusuke Shibayama, Yuzo Yamasaki, Yoshiyuki Kitamura, Hideki Yoshikawa, Toyoyuki Kato

研究成果: ジャーナルへの寄稿学術誌査読

抄録

Purpose: Recently developed and commercialized dual-layer flat panel detectors (DL-FPDs) with two indirect scintillators are capable of acquiring dual-energy X-ray images. However, in clinical practice, they are utilized to perform conventional radiography using diagnostic X-rays with a wide energy spectrum. The two layers of the DL-FPD may affect the obtained image quality, even when only using one layer for conventional image acquisition, and these effects are yet to be substantiated. Therefore, in this study, we quantitatively evaluated the image quality of a conventional chest radiography using DL-FPD and visually verified the characteristics of the chest anthropomorphic phantom images. Methods: The physical characteristics of the system were evaluated using the pre-sampled modulation transfer function (MTF), normalized noise power spectrum (NNPS), and detective quantum efficiency (DQE), for beam quality RQA 7 and RQA 9. In addition, the subjective visibility of the anthropomorphic chest phantom and simple objects images were compared with those of a conventional single-layer flat-panel detector (SL-FPD). Results: No significant differences were found in the MTF between the SL-FPD and DL-FPD images. In addition, a higher DQE was observed at some exposure doses and in the high spatial frequency regions wherein NNPSs were lower for DL-FPD than for SL-FPD. Furthermore, no significant differences were found in the subjective visibility of the chest phantoms in each system. Conclusions: We concluded that the image quality of the conventional radiography acquired with DL-FPD is comparable to or better than that of the SL-FPD.

本文言語英語
ページ(範囲)176-181
ページ数6
ジャーナルPhysica Medica
95
DOI
出版ステータス出版済み - 3月 2022
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 生物理学
  • 放射線学、核医学およびイメージング
  • 物理学および天文学(全般)

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