RI-動態像の特徴抽出

DOI Web Site

書誌事項

タイトル別名
  • THE QUANTITATION OF THE DYNAMIC IMAGE FEATURES
  • RI ドウタイゾウ ノ トクチョウ チュウシュツ 2 Functional I
  • (II) THE QUANTITATIVE ASSESSMENTS OF ERRORS INTRODUCED ON FUNCTIONAL IMAGE
  • 第二報 Functional Imageの誤差解析

この論文をさがす

抄録

We reported previously about the method of constructing functional images, which is based on the one compartment model expressed with X (t) =a+b.exp (-ct). In this report, various errors introduced on functional images have been assessed quantitatively. Generally, the magnitude of the parameter errors in the functional image depends on the following factors : (1) dose of RI-tracer, (2) conditions of data acquisition, (3) characteristics of the radioisotope imaging system, (4) method of the data processing technique when construct the functional images.<BR>In our studies, the parameter errors resulting from fitting exponential function X (t) as a function of RI-tracer dose, without or with the nonuniformity correction and the dead time loss correction, the manner of determination of t =0, the amplitude ratio and the magnitude of the exponent of the function, are estimated experimentally and theoretically, under the fixed conditions of data acquisition.<BR>The results indicates that it is important to define the method of determining the point of t = 0 and to adopt the method which the accuracy and the precision of fitting exponential functions are independent of the dose of RI-tracer and the characteristics of the observations.

収録刊行物

詳細情報 詳細情報について

問題の指摘

ページトップへ