Abstract #1406
Quantitative evaluation of the short-lived eddy currents in shield boxes of the novel MRI head coil integrated with PET detectors
Mikio Suga 1,2 , Takayuki Obata 2 , Kodai Shimizu 1 , Fumihiko Nishikido 2 , Atsushi Tachibana 2 , Hideto Kuribayashi 3 , Iwao Nakajima 4 , Yoshihiko Kawabata 4 , and Taiga Yamaya 2
1
Chiba University, Chiba, Chiba, Japan,
2
National
Institute of Radiological Sciences, Chiba, Chiba, Japan,
3
Siemens
Japan K. K., Tokyo, Japan,
4
Takashima
Seisakusho Co., Ltd., Tokyo, Japan
We are developing a new PET/MRI system in which PET
detectors are closely located at the MR head coil. To
reduce electromagnetic interaction between PET detectors
and MRI coil, the PET detectors are covered with
conductive shield boxes. In this study, we
quantitatively evaluated the secondary magnetic field
induced by short-lived eddy currents in shield boxes and
the effect of slits in shield boxes. The results showed
that the secondary magnetic field induced by the shield
boxes without slits was not negligible for EPI. We can
observe the eddy current reduction effect by making a
slit in a shield box.
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