Vibration Testing
Prior to adding on a new MRI bay we were told we need to have vibration testing performed. Why is this necessary?
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Many modern MR scanners are very sensitive to environmental vibrations. Structural vibrations can result from a number of sources, including nearby motors, pumps, elevators, and vehicles passing near the building.
Prior to constructing a room or installing a new MR scanner in an existing bay, it is important to hire a consultant to perform vibration testing. Each manufacturer will provide siting criteria for maximum allowed vibrations magnitudes at various frequencies.
In many cases, the solutions are relatively simple. For example, it may be possible to relocate nearby offending mechanical equipment or install vibration isolation pads under the machinery. In some cases it may be necessary to place vibration pads under the magnet itself. An even more expensive solution involves isolating the concrete slab on which the magnet rests. In rare cases an alternative site for the magnet will need to be considered.
Prior to constructing a room or installing a new MR scanner in an existing bay, it is important to hire a consultant to perform vibration testing. Each manufacturer will provide siting criteria for maximum allowed vibrations magnitudes at various frequencies.
In many cases, the solutions are relatively simple. For example, it may be possible to relocate nearby offending mechanical equipment or install vibration isolation pads under the machinery. In some cases it may be necessary to place vibration pads under the magnet itself. An even more expensive solution involves isolating the concrete slab on which the magnet rests. In rare cases an alternative site for the magnet will need to be considered.
References
Kellogg J. Electromagnetic Interference (EMI) and Structural Vibration Effects on MRI: Site Construction and Installation Requirements (pdf). ETS-Lindgren White Paper. 2007.
Unger EE. Vibration Criteria for Healthcare Facility Floors (pdf). Sound and Vibration (SandV.com), September, 2007, pp 26-7.
Kellogg J. Electromagnetic Interference (EMI) and Structural Vibration Effects on MRI: Site Construction and Installation Requirements (pdf). ETS-Lindgren White Paper. 2007.
Unger EE. Vibration Criteria for Healthcare Facility Floors (pdf). Sound and Vibration (SandV.com), September, 2007, pp 26-7.