Development of Ultra Low Field Nuclear Magnetic Resonance Imaging System Using HTS rf SQUID
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We constructed and studied an ultra low-field nuclear magnetic resonance imaging system using a HTS rf SQUID and room-temperature coils. We recorded the free induction decay signals of 1H by employing a measuring field, B m, of 44.8 μT and a polarizing field, B p, of 36.8 mT; in the presence of ∂ B Z /∂ z and ∂ B Z /∂ y gradients of the order of 0.8 μT/m, we were able to obtain a quasi two-dimensional 4-pixels image of a simple water phantom.
KeywordsFree Induction Decay Magnetic Resonance Imaging System Gradient Coil Free Induction Decay Signal Measurement Coil
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