Low magnetic field MRI machines out troubleshooting
2012-01-11 by seoer1
A power failure
When the external power supply voltage fluctuation beyond the permitted range, or magnet power supply board failure will result in MR medical products out of all magnetic. When the suspected faulty magnet power supply, we can rely DANFYSIK (differential comparator) on the interlock LED (inside the lock indicator) to determine the direction. Power cabinet in the rear of a number of transistors integrated circuit board called the pass bank board (the board of the heat generated is transported by water to the distilled water cooling system, so the back has a curved metal pipe with the dynasties temperature), power the board through the final delivery to the magnet. When the indicator light shows when the board work properly, the transistor may be damaged, T2, T3, T4 transformer back of the fuse blows, output short circuit or loop on the drive plate D18 damage caused by pass bank transistor panel power gauge so happens . If the LED does not light, it should focus on examination of the external 3-phase power supply is normal and the K5 relay is working correctly.
Second, the water cooling system failure
MR machine water is an important part, because the MR machine in normal operation, the magnet, gradient coil and magnet power supplies will be distributed very high heat. Low-field 0. 2 T MR suture materials with water cooling method, which uses heat exchange with cooling water to reduce the magnet, gradient coil and the heat generated by power supply. Therefore, whether the normal operation of the cooling system will also affect the normal operation of the magnet.