Table 3 1H and 31P relaxation properties of polymer/iron complexes. The standard deviations of all measured variables were ≤ 5%.

From: Iron-based compounds coordinated with phospho-polymers as biocompatible probes for dual 31P/1H magnetic resonance imaging and spectroscopy

Sample code

1H T1

[ms]

1H T2 [ms]

1H r1

[s−1 mM−1]

1H r2

[s−1 mM−1]

r2/r1

31P T1 [ms]

31P T2 [ms]

iResovist®

n.d.ii

n.d

12.3

188.0

15.3

n.d

n.d

γ-Fe2O3

41.9

1.2

7.4

259.2

35.0

n.d

n.d

1a/Fe3+

16.0

9.7

2178.9

3599.7

1.7

 < 200

11.7

1b/Fe3+

10.3

6.2

1209.0

2003.0

1.7

 < 200

3.1

1a/γ-Fe2O3

0.8

0.1

181.8

2897.4

15.9

n.d

n.d

1b/γ-Fe2O3

1.5

0.1

102.9

3182.4

30.9

n.d

n.d

  1. iThe relaxivity values were taken from the literature. 34.
  2. iiNot detectable.
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