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Vymazal J, Brooks RA, Zak O, McRill C, Shen C, Di Chiro G: T1 and T2 of ferritin at different field strengths: effect on MRI. Magn Reson Med. 1992 Oct;27(2):368-74.
Nuclear magnetic relaxation times T1 and T2 were measured in ferritin solutions at field strengths from 0.04 to 1.5 T. T1 was relatively constant, but 1/T2 increased linearly with field strength, in agreement with earlier MRI observations in the monkey brain. This finding supports the theory that ferritin is responsible for T2 shortening in brain nuclei containing iron. The linear dependence of 1/T2 on magnetic field is unique and not explained by present theories of the magnetic properties of ferritin. |
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