pone.0252966.g002.tif (685.33 kB)

Inversion recovery measurements at 1.5 T.

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posted on 2021-06-30, 17:23 authored by Kathryn E. Keenan, Zydrunas Gimbutas, Andrew Dienstfrey, Karl F. Stupic, Michael A. Boss, Stephen E. Russek, Thomas L. Chenevert, P. V. Prasad, Junyu Guo, Wilburn E. Reddick, Kim M. Cecil, Amita Shukla-Dave, David Aramburu Nunez, Amaresh Shridhar Konar, Michael Z. Liu, Sachin R. Jambawalikar, Lawrence H. Schwartz, Jie Zheng, Peng Hu, Edward F. Jackson

The inversion recovery (IR) measurements at 1.5 T both over- and underestimated the T1,NMR. The circles represent the within group means, and the error bars are 95% confidence intervals about these means. The IR measurements, especially in the range of physiological T1 values (~250 ms for adipose tissue to 1800 ms for grey matter) are biased approximately 5% high. Both vendors exhibited this bias; there are no significant differences between them throughout the entire range of T1 times spanned by the ISMRM/NIST phantom array (Table 4).