矩形波チャート像のフーリエ変換によるプリサンプリングMTFの新しい測定法(論文)

DOI Web Site PubMed 被引用文献5件 参考文献9件 オープンアクセス

書誌事項

タイトル別名
  • New Method of Measuring Presampling MTF by Fourier Transform of Square-wave Chart Image(cientific Paper)

この論文をさがす

説明

We developed an easy method of measuring the presampling modulation transfer function (MTF) using the square wave chart in digital radiography. In this method, the presampling MTF is measured by Fourier transform of image data of the square wave chart. When Fourier analysis of the sampling data of a square wave is carried out, it is generally difficult to find the starting point and terminal point of the periodic data that should be extracted because of an insufficient number of data. To solve this problem, interpolated data were calculated by using a window function of the frequency domain. The aliasing error was avoided using a char acteristic such that the square wave has discrete frequency components. The accuracy of this method was in vestigated by computer simulation study. Actual measurement of the presampling MTF by this method was also performed with a CR system. These studies indicated the effectiveness of our proposed method in terms of accuracy and ease of use.

収録刊行物

被引用文献 (5)*注記

もっと見る

参考文献 (9)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ