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Abstract #4843

The effect of anchoring of MR scanners to prevent earthquake hazards an analysis of the damages to the 602 MR scanners in Great East Japan Earthquake

Sachiko Yamaguchi-Sekino 1 , Yoshio Machida 2 , Toshio Tsuchihashi 3 , Haruo Isoda 4 , Takeshi Noguchi 5 , and Toshiharu Nakai 6

1 National Insitiute of Occupational Safety and Health, Japan, Kawasaki, Kanagawa, Japan, 2 Tohoku University, Graduate School of Medicine, Miyagi, Japan, 3 Department of Radiology, Nippon Medical School Hospital, Tokyo, Japan, 4 Nagoya University, Graduate School of Medicine, Aichi, Japan, 5 National Institute for Material Science, Ibaraki, Japan, 6 NeuroImaging & Informatics, National Center for Geriatrics and Gerontology, Aichi, Japan

In order to evaluate the potential risk to MR scanners and consider patient safety under large earthquakes, we have performed a survey study to investigate damages in MR scanners caused by Great East Japan Earthquake. It was confirmed that the extent of damage was significantly different between seismic scale (SS) 5 and SS over 6. Logistic regression analysis suggested that anchoring for MR facilities reduced the occurrence of quake-induced damages in MR scanners. And significant decrease in machine damages was observed in the group of base isolation structure for medical facilities compared with earthquake-proof structures.

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