High-resolution investigations of edge effects in neutron imaging

被引：32

作者：

Strobl, M. ^{[1
,2
]}

Kardjilov, N. ^{[1
]}

Hilger, A. ^{[1
]}

Kuehne, G. ^{[3
]}

Frei, G. ^{[3
]}

Manke, I. ^{[1
]}

机构：

[1] Helmholtz Zentrum Berlin, D-14109 Berlin, Germany

[2] Heidelberg Univ, D-69120 Heidelberg, Germany

[3] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2009年 / 604卷 / 03期

关键词：

Neutron imaging; Phase contrast; Diffraction; Refraction; Total reflection; PHASE-CONTRAST RADIOGRAPHY; TOMOGRAPHY; BEAM;

D O I：

10.1016/j.nima.2009.03.020

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Edge enhancement is the main effect measured by the so-called inline or propagation-based neutron phase contrast imaging method. The effect has originally been explained by diffraction, and high spatial coherence has been claimed to be a necessary precondition. However, edge enhancement has also been found in conventional imaging with high resolution. In such cases the effects can produce artefacts and hinder quantification. In this letter the edge effects at cylindrical shaped samples and long straight edges have been studied in detail. The enhancement can be explained by refraction and total reflection. Using high-resolution imaging, where spatial resolutions better than 50 mu m could be achieved, refraction and total reflection peaks - similar to diffraction patterns - could be separated and distinguished. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：640 / 645

页数：6

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