Locally antenna with a homogeneous sensitivity for a nuclear magnetic resonance - image device

摘要

a lokalantenne (24) for sending and / or receiving of inducing radio frequency signals in a nuclear magnetic resonance imager comprises a first teilantenne (26) and a second axial beabstandete to teilantenne (26). the two teilantennen (26) are each at least one winding (26).an electrical series connection is formed from the first teilantenne (26), a capacitive element (28) to shorten the effective length of the hochfrequenzsignal and the second series connection. both teilantennen have same wicklungssinn. in parallel with the series connection (26, 28, 26) is a parallelkapazitu00e4t (42, 44) circuit.the kapazitu00e4tswerte of capacitive elements (28) and the parallelkapazitu00e4t (42, 44) are about the same. to build a lokalantennensystems (22), which is particularly suitable for mammography, two lokalantennen (24) arranged side by side and electrically parallelgeschaltet. the capacitive elements (28) of the two lokalantennen (24) are turned to each other.