Increased use of low-field MRI and quantitative MRI suggests a need for accurate quantitative measurements for fields <0.55T. We measure T1 and T2 for normal brain tissues at 0.064T using a Hyperfine scanner. T1 measurements gave a mean of 266±8.4ms for white matter, 358±6.6ms for grey matter; T2 measurements gave a mean of 95.8±2.4ms for combined white matter and grey matter, 794±357ms for CSF. Validation samples are measured on the Hyperfine system and compared to measurements taken on an electromagnet NMR at 0.064T.
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