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. Author manuscript; available in PMC: 2013 Jan 1.
Published in final edited form as: Magn Reson Med. 2011 Jun 7;67(1):20–26. doi: 10.1002/mrm.22993

Table 1.

Chemical shift assignment and relaxation times of fat protons in adipose breast tissue.

Letter and Structure Chemical Group Chemical Shift, ppm T1, ms T2a, ms
A (methyl protons) -CH3 0.90 1,071 ± 27 41 ± 18
B (methylene protons) -(CH2)n- 1.30 549 ± 16 52 ± 17
C (methylene protons β to COO) -CH2-CH2-COO 1.59 470 ± 15 40 ± 8
D (methylene protons α to C=C) -CH2-CH=CH-CH2- 2.04 502 ± 11 32 ± 4
E (methylene protons α to COO) -CH2-COO 2.25 465 ± 22 36 ± 3
F (diallylic methylene protons) =CH-CH2-CH= 2.77 629 ± 72 40 ± 3
G (methylene glycerol backbone) CH2-O 4.10
H (methylene glycerol backbone) CH2-O 4.25
I (methine glycerol backbone) CH-O 5.22 44
J (methine protons) -CH=CH- 5.31 42 ± 19

Resonance assignments by letter correspond to Figure 1. Values are mean ± 1 SD.

a

Apparent T2; Although the decay curves were fitted with single exponential, there may be additional J-coupling contributions to the decay.