Title :
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
fDate :
10/1/1990 12:00:00 AM
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;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
