The Evaluation of Physical Imaging Properties for Digital Radiography -The Resolution Property(The Slit Method)

Ideguchi, Tadamitsu

doi:10.6009/jjrt.65.1109

Nippon Hoshasen Gijutsu Gakkai Zasshi

2009

DOI: 10.6009/jjrt.65.1109

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The Evaluation of Physical Imaging Properties for Digital Radiography -The Resolution Property(The Slit Method)

Tadamitsu Ideguchi¹

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Cited by 4 publications

References 6 publications

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Effect of readout direction in the edge profile on the modulation transfer function of computed radiographic systems by use of the edge method

Tanaka

Morishita

Tsuda

et al. 2013

Radiol Phys Technol

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We investigated the effect of the readout direction of the edge profile obtained by the edge method on the presampled modulation transfer function (MTF) in various computed radiographic (CR) systems. There were no differences in the MTFs derived from two edge profiles in the sub-scanning direction of four CR systems used in this study. On the other hand, the MTFs measured at a readout direction from the low (edge) to the high (direct exposure) exposure region were higher than those measured at a readout direction from the high to the low exposure region in the laser-beam scanning direction for three of the four CR systems. Although this phenomenon depends on the CR system, it is important to understand and indicate both MTFs at the two edge profiles in the laser-beam scanning direction for accurate assessment of the resolution property.

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Effect of readout direction in the edge profile on the modulation transfer function of computed radiographic systems by use of the edge method

Tanaka

Morishita

Tsuda

et al. 2013

Radiol Phys Technol

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

Kuramoto

Takarabe

Okamura

et al. 2020

Dentomaxillofacial Radiology

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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.

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Imaging Property of Image Receptor System

Kawata¹

2010

Nippon Hoshasen Gijutsu Gakkai Zasshi

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The Evaluation of Physical Imaging Properties for Digital Radiography -The Resolution Property(The Slit Method)

Cited by 4 publications

References 6 publications

Effect of readout direction in the edge profile on the modulation transfer function of computed radiographic systems by use of the edge method

Effect of readout direction in the edge profile on the modulation transfer function of computed radiographic systems by use of the edge method

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

Imaging Property of Image Receptor System

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