Abstract
Objective
To determine technical properties for a direct digital intraoral radiographic system, F1iOX (Fimet Oy, Moninkylä, Finland).
Methods
A dose response function was calculated from seven radiographs exposed to a homogenous radiation field. The line spread function (LSF) and the modulation transfer function (MTF) were determined from a radiograph of a test object having a slit. Noise power spectra (NPSs) were determined at three exposures from radiographs exposed to a homogeneous radiation field. Noise equivalent quanta (NEQs) were calculated from NPSs and the MTF. Detective quantum efficiencies (DQEs) were determined from the NEQs and a representative value of the photon fluence. Signal-to-noise ratios (SNRs) were calculated from the NEQs and different signal contrasts.
Results
The dose response function was linear and the system relatively sensitive. The maximum NPS was less than 10−5 mm2. NEQs indicate that the system captures a relatively high number of photons. At peaks of about 1 cycle/mm DQEs reached almost 35%. SNRs are relatively high.
Conclusion
The technical properties found in this study indicate that the F1iOX system is suitable for intraoral dental radiography.
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Li, G., Yoshiura, K., Shi, XQ. et al. Physical properties of a system for direct acquisition of digital intraoral radiographs. Oral Radiol. 19, 22–27 (2003). https://doi.org/10.1007/BF02493288
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DOI: https://doi.org/10.1007/BF02493288