Dynamic Contrast Enhanced-MRI of the Liver using Automated Navigator Tracker and Prospective Navigator Correction
Takao Goto 1 , Shiro Ozaki 2 , Yuji Iwadate 3 , Kunihiro Miyoshi 1 , Koji Uchida 4 , Hajime Kitagaki 4 , and Hiroyuki Kabasawa 3
MR Engineering, GE Healthcare, Hino-shi,
University Hospital, Izumo-shi, Shimane, Japan,
MR Applications and Workflow, GE Healthcare, Hino-shi,
of Radiology, Shimane University Faculty of Medicine,
Izumo-shi, Shimane, Japan
In our previous study, we proposed a method for
automated navigator tracker (ANAV) positioning to
improve operator workflow. In order to progress this
work further, we applied an ANAV to a prospective
navigator correction. The T1 weighted fat-saturated 3D
fast SPGR sequence is used for the DCE-MRI, which
acquired pre-contrast, arterial, portal, equilibrium and
two delayed phase images with the breath-holding method.
We set the top position of the liver as a reference in
the pre-contrast images. The navigator tracked this
position in successive phase images. Forty patients were
tested, producing satisfactory results and helping to
identify a limitation.
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