| 摘要 |
<p>The ferrous detector (10) includes an array of passive magnetic field sensors located near the access doorway (12) of the shield room housing of the MRI apparatus. The array sensors (11, 13) are connected to an electronic central processing unit (15). The pre-amp/pre-processor (16) is connect the sensors (11, 13) to the signal processor and alarm generator (17), which generates an alarm when ferrous material is detected on the basis of programmed parameters.</p> |
