Effect of differences in pixel size on image characteristics of digital intraoral radiographic systems: A physical and visual evaluation

Taku Kuramoto, Shinya Takarabe, Kazutoshi Okamura, Kenshi Shiotsuki, Yusuke Shibayama, Hiroki Tsuru, Hiroshi Akamine, Masato Tatsumi, Toyoyuki Kato, Junji Morishita, Kazunori Yoshiura

研究成果: Contribution to journalArticle査読

抄録

Objectives: To quantify and validate the effect of pixel size on a digital intraoral radiographic system according to International Electrotechnical Commission standards through physical and visual evaluations. Methods: The digital intraoral radiographic system used was the photostimulable phosphor imaging plate and scanner system. The system had three image capture modes: high-speed (HS), high-resolution (HR), and super high-resolution (SHR) with different pixels. The physical characteristics of the system were evaluated using presampled modulation transfer function (MTF) and the normalized noise power spectrum (NNPS). An aluminum (Al) step phantom with different depths of holes was used to acquire images under various exposure conditions. The average number of perceptible holes from all steps was plotted against each exposure dose. The results were compared to analyze the effects of pixel size on image quality of intraoral radiographs. Results: The MTF was slightly higher with SHR than with HR and HS. The NNPS with SHR showed about a 40% decrease in magnitude compared to HS. The total number of perceptible holes in the Al step phantom was higher with SHR than with HS and HR in all exposure conditions. conclusions: The MTF and NNPS obtained with different pixel size could be quantified by physical evaluation, and the differences were visually validated with Al step phantom. The SHR mode has the potential to decrease the radiation dose without compromising the image quality.

本文言語英語
論文番号20190378
ジャーナルDentomaxillofacial Radiology
49
6
DOI
出版ステータス出版済み - 2020

All Science Journal Classification (ASJC) codes

  • Otorhinolaryngology
  • Radiology Nuclear Medicine and imaging
  • Dentistry(all)

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