What does a deflection angle less than or equal to 45 degrees typically signify about an object’s MR safety status?

What does a deflection angle less than or equal to 45 degrees typically signify about an object’s MR safety status?

• A. It is MR Unsafe
• B. It is MR Conditional
• C. It is definitely MR Safe
• D. More testing is required

Answer: (C)

Deflection angle shows how strongly an object is attracted to the MRI’s static magnetic field. When the angle is 45 degrees or less, the magnetic force on the object is small, so it’s treated as MR Safe—there’s no projectile risk in the MR environment. If the deflection angle is greater than 45 degrees, the object experiences a stronger magnetic pull, increasing risk and typically leading to MR Unsafe labeling or requiring specific conditions under MR Conditional status. Keep in mind this test mainly addresses projectile risk; heating or other interactions are assessed by separate criteria.

Deflection angle shows how strongly an object is attracted to the MRI’s static magnetic field. When the angle is 45 degrees or less, the magnetic force on the object is small, so it’s treated as MR Safe—there’s no projectile risk in the MR environment. If the deflection angle is greater than 45 degrees, the object experiences a stronger magnetic pull, increasing risk and typically leading to MR Unsafe labeling or requiring specific conditions under MR Conditional status. Keep in mind this test mainly addresses projectile risk; heating or other interactions are assessed by separate criteria.