System and method for prepolarizing magnetic resonance- or relaxation-based measurements
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United States of America Patent
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Jun 20, 2017
Grant Date -
Mar 27, 2014
app pub date -
Apr 21, 2011
filing date -
Apr 21, 2011
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Abstract
The invention relates to a prepolarizing magnetic resonance- or relaxation-based measurement system, comprising a prepolarizing coil for producing a prepolarizing field at the target zone, means for pulsing the prepolarizing field according to a first pulsing scheme, and means for measuring magnetization of a target placed in the target zone. According to the invention, the system further comprises a shielding coil for producing a shielding field and means for pulsing the shielding field according to a second pulsing scheme, whereby the shielding coil and the second pulsing scheme are arranged to reduce the formation of unwanted transient fields caused by the coupling of the prepolarizing coil to conducting or magnetic structures in the surroundings of the system. The invention also relates to a corresponding method of measurement and a process of designing the pulsing schemes for the system or process. By means of the invention, the formation of unwanted eddy currents, for example, in the surroundings of the measurement system, can be reduced.
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