Comparison of basic imaging properties for digital radiographic systems based on a direct conversion type of flat panel detector

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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The purpose of this study was to evaluate the basic imaging properties of the two latest digital radiographic X-ray systems, namely, the DynaDirect Winscope 6000 (abbr. as System A, Toshiba Medical Systems) and the Sonialvision Safire Multi (abbr. as System B, Shimadzu Corp.). These systems were based on a direct-conversion flat panel detector (FPD) of amorphous selenium. The basic imaging properties of the two systems were evaluated by measuring characteristic curves, presampled modulation transfer functions (MTFs), and noise power spectra (NPS) using DICOM images to which no resampling was performed with a matrix size of 2048x2048. In addition, noise equivalent quanta (NEQ) and detective quantum efficiency (DQE) calculated from the result of the basic imaging properties were evaluated. The characteristic curves of the two systems showed quite high linearity. The MTFs of the two systems indicated high-resolution properties, as is well known to be an advantage of the direct conversion FPD system. However, the NPS of System A showed better performance than System B under the same exposures. Therefore, the DQE of System A was higher than that of System B at all spatial frequencies.

Original languageEnglish
Pages (from-to)41-49
Number of pages9
JournalNippon Hoshasen Gijutsu Gakkai zasshi
Volume64
Issue number1
DOIs
Publication statusPublished - Jan 20 2008

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Selenium
Noise
X-Rays

All Science Journal Classification (ASJC) codes

  • Medicine(all)

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Comparison of basic imaging properties for digital radiographic systems based on a direct conversion type of flat panel detector. / Sakai, Shinji; Katayama, Reiji; Morishita, Junji; Sakaguchi, Taro; Ohkubo, Seiji; Maeda, Takashi; Hayabuchi, Naofumi.

In: Nippon Hoshasen Gijutsu Gakkai zasshi, Vol. 64, No. 1, 20.01.2008, p. 41-49.

Research output: Contribution to journalArticle

Sakai, Shinji ; Katayama, Reiji ; Morishita, Junji ; Sakaguchi, Taro ; Ohkubo, Seiji ; Maeda, Takashi ; Hayabuchi, Naofumi. / Comparison of basic imaging properties for digital radiographic systems based on a direct conversion type of flat panel detector. In: Nippon Hoshasen Gijutsu Gakkai zasshi. 2008 ; Vol. 64, No. 1. pp. 41-49.
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