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Abstract #3971

Investigation of the dependence of measured lung T 1 on TE using UTE

Simon MF Triphan 1,2 , Bertram J Jobst 1 , Felix A Breuer 2 , Mark O Wielpuetz 1 , Claus Peter Heussel 3 , Hans-Ulrich Kauczor 1 , Juergen Biederer 1,4 , and Peter M Jakob 2,5

1 Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany, 2 Research Centre Magnetic Resonance Bavaria e.V., Wuerzburg, Germany, 3 Dept. of Radiology, Thoraxklinik Heidelberg, Heidelberg, Germany, 4 Radiologie Darmstadt, Darmstadt, Germany, 5 Experimental Physics 5, University of Wuerzburg, Wuerzburg, Germany

Lung T 1 was measured using a multi-echo inversion recovery UTE sequence at TEs between 70μs and 2.3ms in 10 healthy volunteers. A significant increase of average measured T 1 with TE was observed, with mean values of 1051ms and 1408ms for the shortest and longest TE. This TE-dependence is assumed to reflect separate blood and extravascular components in the lung that exhibit both different T 1 and T 2 * times. In consequence, comparison of lung T 1 values requires consideration of TE. This effect may also be exploited to gain information on these compartments.

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