X- and γ-rays computerized minitomograph scanner for soil science

Author

Cruvinel, Paulo Estevao ; Cesareo, Roberto ; Crestana, Silvio ; Mascarenhas, Sergio

Author_Institution

Minist. da Agric., EMBRAPA/UAPDIA, Sao Carlos, Brazil

Volume

39

Issue

5

fYear

1990

fDate

10/1/1990 12:00:00 AM

Firstpage

745

Lastpage

750

Abstract

A computerized tomograph scanner system that uses X- and γ-rays for applications in soil science is described. Use of the apparatus in measuring volumetric water content to an accuracy of ±3% and soil bulk density to ±2% (in grams per cubic centimeters) is discussed. The system features translation and rotation scanning modes, a 200-mm effective field of view, signal processing by pulse counting, and 1.0-mm spatial resolution. The system´s advantages over classical methods are listed, principles of the tomographic method and physical considerations are presented, and the system´s design is described

Keywords

X-ray applications; computerised instrumentation; computerised tomography; density measurement; gamma-ray applications; geophysical equipment; geophysics computing; moisture measurement; soil; γ-rays; X-rays; computerized minitomograph scanner; moisture measurement; pulse counting; rotation scanning modes; signal processing; soil bulk density; tomograph; translation scanning; volumetric water content; Application software; Biomedical computing; Biomedical measurements; Computed tomography; Density measurement; Image reconstruction; Pixel; Pollution measurement; Shape measurement; Soil measurements;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.58619

Filename

58619