In recent years, helium has become more scarce and, therefore, expensive. Meanwhile, the race has been on among magnet manufacturers to dramatically reduce or even eliminate helium “burn” or “boil off” in an MRI. Fortunately, there have been a number of successes in that endeavor. But, just because the technology exists to bring helium consumption levels to all-time lows doesn't mean that most systems in the field today operate at that level.
The following is a breakdown of typical helium loss rates among popular MRI models; some long-standing workhorses, others just beginning their years of service to patients in the field.