COIL SYSTEM FOR THE PRODUCTION OF HIGHLY UNIFORM POLARIZATION MAGNETIC FIELD GRADIENTS IN AN IMAGING OR NMR SPECTROSCOPY INSTALLATION

摘要

P COIL SYSTEM, FOR THE PRODUCTION IN IMAGING, BY NUCLEAR MAGNETIC RESONANCE OF GRADIENTS G, G, ARRANGED ON THE OUTER SURFACE OF A RIGHT CYLINDER OF OZ AXIS AND RAY R REVOLUTION, CHARACTERIZED IN THAT INCLUDES FOUR PATTERNS OF SYMMETRICAL CONDUCTOR THREADS TWO TO TWO TO CENTER O AND TWO TO TWO TO VERTICAL PLAN XOY: -CHAPES PATTERN INCLUDES THREE ARCS PARTICIPATING IN THE CREATION OF GRADIENT RESEARCH, TO KNOW TWO "GO" ARCS LOCATED NEAR FROM CENTER O TO RESPECTIVE DISTANCES H AND H FROM PLAN XOY AND A "RETURN" ARCH FURTHER FROM THE CENTER O AND LOCATED AT DISTANCE H OF PLAN XOY; -CHECK ARC HAS THREE SECTIONS A, B, C WHOSE BOTH EXTREMES AND C OF EQUAL LENGTH ARE BROUGHT THROUGH A CURRENT CURRENT THAT HAS THE CENTRAL SECTION B, BECAUSE THE HR, HR AND HR RATIOS ARE CHOSEN AS FAR AS POSSIBLE OF THE FOLLOWING VALUES: / P P HR: 0.15 to 0.3, / P P HR: 0.7 to 1.0, / P P HR: 1.5 to 2.5. / P