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NMR/MRI system in microtesla fields using a high- SQUID sensor.
Sequences used in the NMR/MRI detection: (a) a measuring field , (b) the prepolarization field with a duration time , (c) gradient fields for phase encoding, (d) gradient fields for FID spin-echo NMR signal, as well as (e) FID and spin-echo NMR signals.
(a) The intensity of NMR signals as a function of the prepolarization time for cancerous and controlled livers of rats and (b) for the same controlled and cancerous livers of rats.
(a) NMR intensity as a function of and (b) geometry of phantoms and images taken at (c) , (d) , and (e) .
(a) The intensity of phantoms as a function of , (b) three phantoms composed of 2.5 ml tap water, 2.5 ml cancerous liver tissue, and 2.5 ml controlled liver tissue, and (c) MRI taken at and the dashed circle shows its geometry of phantoms.
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