Abstract #0971
Initial Human Imaging Experience with a Head-only Gradient System Utilizing 80 mT/m and 500 T/m/s
John Huston III 1 , Shengzhen Tao 1 , Joshua D. Trzasko 1 , Paul T. Weavers 1 , Yunhong Shu 1 , Erin Gray 1 , Seung-Kyun Lee 2 , Jean-Baptiste Mathieu 2 , Christopher J. Hardy 2 , John Schenck 2 , Ek Tsoon Tan 2 , Thomas K.F. Foo 2 , and Matt A. Bernstein 1
1
Radiology, Mayo Clinic, Rochester, MN,
United States,
2
GE
Global Research, Niskayuna, NY, United States
A second generation head-only gradient system with
asymmetric transverse coils and all hollow-conductor
coils was constructed and human volunteers imaged.
Testing occurred inside a conventional whole-body 3T
magnet to assess image quality and peripheral nerve
stimulation (PNS). The gradient was integrated with a
custom-built birdcage transmit/receive coil and a Nova
32-channel receiver array. Initial experience
demonstrated high quality brain images with gradients
performing at 80 mT/m and 500 T/m/s simultaneously while
minimizing peripheral nerve stimulation. In addition, a
novel integrated gradient nonlinearity correction
strategy was found to improve in vivo images acquired on
this system.
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