Multicenter, multivendor phantom study to validate proton density fat fraction and T2* values calculated using vendor-provided 6-point DIXON methods

Publication date: September–October 2018
Source:Clinical Imaging, Volume 51
Author(s): Tatsuya Hayashi, Kei Fukuzawa, Hidekazu Yamazaki, Takashi Konno, Tosiaki Miyati, Jun'ichi Kotoku, Hiroshi Oba, Hiroshi Kondo, Keiko Toyoda, Satoshi Saitoh
PurposeTo evaluate the reproducibility of proton density fat fraction (PDFF) and T2* in a fat-water phantom on three different 3 T MRI systems using 6-point DIXON methods.MethodsA phantom which included varying fat volume percentages (true fat fraction [FF]) was scanned by three 3 T MR machines, and PDFF and T2* were measured.ResultsThe mean difference between true FF and PDFF was small in all vendors (−2.11% to 0.41%). However, the difference ratio for T2* values was large among vendors (1.79 to 3.36).ConclusionsTrue FF and PDFF were consistent across vendors; however, T2* varied greatly.



http://ift.tt/2EMCy3m