[Correlation between basic imaging properties and subjective evaluations of two digital radiographic X-ray systems based on direct-conversion flat panel detector].

Taro Sakaguchi, Reiji Katayama, Junji Morishita, Shinji Sakai, Hidefumi Kuroki, Seiji Ohkubo, Takashi Maeda, Naofumi Hayabuchi

Research output: Contribution to journalArticle

Abstract

The purpose of this study was to examine the correlation between the basic imaging properties of two digital radiographic X-ray systems with a direct conversion flat-panel detector and their image qualities, which were evaluated by the observer in hard copy and soft copy studies. The subjective image quality was evaluated and compared in terms of the low-contrast detectability and image sharpness in the two digital radiographic X-ray systems. We applied the radiographs of a contrast detail phantom to the evaluation of low-contrast detectability and analyzed the contrast detail diagrams. Finally, low-contrast detectability was evaluated by the image quality figure (IQF) calculated from the contrast detail diagrams. Also, the subjective image sharpness of human dry bones of two systems was examined and evaluated by the normalized-rank method. The results indicated that System A tended to provide superior subjective image quality compared to System B in both observer studies. We also found high correlations between IQFs and basic imaging properties, such as the noise power spectrum (NPS) and the noise equivalent quantum (NEQ). In conclusion, the low-contrast detectability of the two digital radiographic X-ray systems with a direct conversion flat-panel detector corresponded to the NPS and the NEQ in both outputs (soft copy and hard copy). On the other hand, the subjective image sharpness of human dry bones was affected by their noise properties.

Original languageEnglish
Pages (from-to)1457-1466
Number of pages10
JournalNippon Hoshasen Gijutsu Gakkai zasshi
Volume66
Issue number11
DOIs
Publication statusPublished - Nov 20 2010

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Noise
X-Rays
Bone and Bones

All Science Journal Classification (ASJC) codes

  • Medicine(all)

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[Correlation between basic imaging properties and subjective evaluations of two digital radiographic X-ray systems based on direct-conversion flat panel detector]. / Sakaguchi, Taro; Katayama, Reiji; Morishita, Junji; Sakai, Shinji; Kuroki, Hidefumi; Ohkubo, Seiji; Maeda, Takashi; Hayabuchi, Naofumi.

In: Nippon Hoshasen Gijutsu Gakkai zasshi, Vol. 66, No. 11, 20.11.2010, p. 1457-1466.

Research output: Contribution to journalArticle

Sakaguchi, Taro ; Katayama, Reiji ; Morishita, Junji ; Sakai, Shinji ; Kuroki, Hidefumi ; Ohkubo, Seiji ; Maeda, Takashi ; Hayabuchi, Naofumi. / [Correlation between basic imaging properties and subjective evaluations of two digital radiographic X-ray systems based on direct-conversion flat panel detector]. In: Nippon Hoshasen Gijutsu Gakkai zasshi. 2010 ; Vol. 66, No. 11. pp. 1457-1466.
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