Physical evaluation of a system for direct digital intra-oral radiography based on a charge-coupled device

K. Yoshiura, H. C. Stamatakis, U. Welander, W. D. McDavid, X. Q. Shi, S. Ban, T. Kawazu, M. Tatsumi, S. Kanda

研究成果: ジャーナルへの寄稿学術誌査読

17 被引用数 (Scopus)

抄録

Objectives: To determine technical properties of a direct digital intra-oral radiographic system, the Dixel® (J Morita Corporation, Kyoto, Japan). Methods: A dose response function and the dark current were calculated from two series of exposures to a homogeneous radiation field. The line spread function (LSF) and the modulation transfer function (MTF) were determined from radiographs of an edge. The noise power spectrum (NPS) was determined at three exposures from radiographs exposed to homogeneous radiation fields. Noise equivalent quanta (NEQ) were calculated from the one-dimensional NPS and the MTF. The detective quantum efficiency (DQE) was determined from the NEQ and a representative value of the photon fluence. Signal-to-noise ratios (SNR) were calculated from the NEQs and different signal contrasts. Results: The dose response function demonstrated a slight curvature. There was no effect of the dark current. NPS ranged from 10-5-10-7 mm2 depending on exposure and frequency. At a peak of about 2 cycles/mm the DQE is on an average about 30 per cent. SNRs are favorable. Conclusion: The technical properties found in this study indicate that the Dixel® system is suitable for intra-oral dental radiography.

本文言語英語
ページ(範囲)277-283
ページ数7
ジャーナルDentomaxillofacial Radiology
28
5
DOI
出版ステータス出版済み - 1999

!!!All Science Journal Classification (ASJC) codes

  • 耳鼻咽喉科学
  • 放射線学、核医学およびイメージング
  • 歯科学(全般)

フィンガープリント

「Physical evaluation of a system for direct digital intra-oral radiography based on a charge-coupled device」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル