Читать книгу Essentials of MRI Safety - Donald W. McRobbie - Страница 88

You can use Figure 2.22 and Equation 2.18 to calculate the torque on a ferromagnetic object which saturates at 1 T. Suppose a cylinder is at 30° to B₀, and is 50 cm long, 10 cm diameter.

From the figure the multiplier for the angle is 0.43 and for the l/d ratio is 5. The volume is

The torque is then

The force exerted on the ends of the object is given by the torque divided by half the length = 2057 N.