Journal
MAGNETIC RESONANCE IN MEDICINE
Volume 65, Issue 5, Pages 1297-1304Publisher
WILEY-BLACKWELL
DOI: 10.1002/mrm.22723
Keywords
in vivo blood T-1; inversion recovery; internal jugular vein; sickle cell anemia
Funding
- NIH-NIBIB [R01-EB002634]
- NIH-NCRR [P41-RR15241]
- American Society of Hematology [5K23HL078819-04]
Ask authors/readers for more resources
Current T-1 values for blood at 3T largely came from in vitro studies on animal blood or freshly drawn human blood. Measurement of blood T-1 in vivo could provide more specific information, e.g., for individuals with abnormal blood composition. Here, blood T-1 at 3T was measured rapidly (<1 min) in the internal jugular vein using a fast inversion-recovery technique in which multiple inversion time can be acquired rapidly due to constant refreshing of blood. Multishot EPI acquisition with flow compensation yielded high resolution images with minimum partial volume effect. Results showed T-1 = 1852 +/- 104 msec among 24 healthy adults, a value higher than for bovine blood phantoms (1584 msec at Hot of 42%). A second finding was that of a significant difference (P < 0.01) between men and women, namely T-1 = 1780 +/- 89 msec (n = 12) and T-1 = 1924 +/- 58 msec (n = 12), respectively. This difference in normal subjects is tentatively explained by the difference in Hct between genders. Interestingly, however, studies done on sickle cell anemia patients with much lower Hot (23 +/- 3%, n = 10) revealed similar venous blood T-1 = 1924 +/- 82 msec, indicating other possible physical influences affecting blood T-1. Magn Reson Med 65:1297-1304,2011. (c) 2010 Wiley-Liss, Inc.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available