Evaluation of a microtomography system with an X-ray microfocus tube

被引：12

作者：

Lopes, RT

Rodrigues, JL

De Assis, JT

De Jesus, EFO

De Oliveira, LF

机构：

[1] UFRJ, COPPE, Lab Instrumentacao Nucl, BR-21495970 Rio De Janeiro, Brazil

[2] UERJ, Inst Politecn, BR-28614970 Rio De Janeiro, Brazil

来源：

APPLIED RADIATION AND ISOTOPES | 1997年 / 48卷 / 10-12期

关键词：

D O I：

10.1016/S0969-8043(97)00256-X

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The microfocus radiography system has been realized by means of a microfocus X-ray tube (maximum 160 kV), an image intensifier data collector and a five degree of freedom manipulation table. An 8-bit image acquisition PC-card and software were included to compose the microtomography system. To assemble the system, an image quantitative analysis was carried out by evaluation of the focal spot size, modulation transfer function of the system, and the 'defect discernibility curves'. The 2D microtomographies were carried out using the mean of 10 image central lines in each projection. Image processing techniques were also used to obtain better results. The image reconstruction program is based on a filtered backprojection algorithm using a special window. Images of various types of samples were carried out in order to verify the performance of the system. (C) 1997 Elsevier Science Ltd. All rights reserved.

引用

页码：1437 / 1442

页数：6