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. Author manuscript; available in PMC: 2015 Dec 1.
Published in final edited form as: NMR Biomed. 2014 May 12;27(12):1502–1514. doi: 10.1002/nbm.3127

Figure 1.

Figure 1

Empirical determination of the nominal echo time required to accumulate a 90° phase difference (TE90) between 129Xe dissolved in the red bloods cells (RBC) and the barrier tissues (blood plasma and lung parenchyma). a) Dissolved 129Xe spectrum at TE =250 µs. b) Dissolved 129Xe spectrum processed identically, but at TE = 700 µs. c) Dissolved129Xe phase evolution as a function of time. Linear regression (black line) shows that 90° phase difference is achieved at TE = 373 µs rather than the ~730 µs expected fromTE90 = 1/(4ΔF.