| 摘要 |
According to one embodiment, a top-board moving unit includes a top-board moving motor, a drive-signal generating means and a charge-discharge means. The top-board moving motor moves, in a prescribed direction, a top board on which a subject is placed. The drive-signal generating means generates drive signals for operating the top-board moving motor. The charge-discharge means charges and discharges regenerative electric power generated in the top-board moving motor.
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