الفهرس 
ملخص االعربىOnly 14 pages are availabe for public view
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Abstract
WE ARE CONCERNED WITH THE SOLUTION OF THIS EQUATION.THE PROBLEM IS KNOWN TO BE ILLCONDITIONED,THUS THE METHODS OF REGULARIZATION AND SINGULAR VALUE DECOMPOSITION WERE INTRODUCED FOR THE SOLUTION OF THIS EQUATION.SOME PROBLEMS OF TOMOGRAPHY WITHIN AN ELLIPSE WITH CENTRE AT X-AXIS,CIRCLE WITH CENTRE AT X-AXIS AND ELLIPSE WITH CENTRE AT THE ORIGIN ARE ALSO DISCUSSED .