ＦＰＤシステムにおけるリサンプリングが基本的な画質特性の測定に及ぼす影響

DOI Web Site PubMed 被引用文献6件 参考文献25件 オープンアクセス

書誌事項

タイトル別名
  • Effect on Image Data Resampling in Evaluation of the Basic Imaging Properties for a Digital Radiographic System Based on a Flat Panel Detector
  • FPD システム ニ オケル リサンプリング ガ キホンテキナ ガシツ トクセイ ノ ソクテイ ニ オヨボス エイキョウ
公開日
2007
DOI
  • 10.6009/jjrt.63.749
公開者
公益社団法人 日本放射線技術学会

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説明

We investigated the effect on image data resampling in an evaluation of the basic imaging properties for a digital radiographic system based on a flat panel detector (FPD). One of the latest digital radiographic systems was used in this study. This system was based on a direct-conversion FPD of amorphous selenium. The basic imaging properties of the system were evaluated by measuring characteristic curve, presampled modulation transfer function (MTF), and Wiener spectrum (WS) using DICOM image with a matrix size of 2048×2048. The evaluations were performed under two conditions because matrix size automatically changes according to the selection of imaging size. One of the conditions was a different matrix size between image data acquired on the FPD and the output image (DICOM image for which resampling was performed). The other condition was that these matrices be the same size (DICOM image with no resampling performed). Resampling did not affect the characteristic curves. However, MTF and the WS obtained from the resampled data were different from those of the one not resampled, which is considered to be the "inherent" basic imaging properties, and this phenomenon was remarkable, especially in terms of the MTFs. Our study indicates that the effect on resampling should not be disregarded in evaluating the basic imaging properties of digital radiographic systems. Therefore, it is mandatory to use DICOM images for which no resampling was performed in order to evaluate the inherent basic imaging properties for digital radiographic systems.

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