If the flip angle is doubled, how does RF deposition change?

When the flip angle in MRI is doubled, the RF (radiofrequency) deposition increases due to the relationship between flip angle and the amount of energy deposited in the tissue. The RF power deposition is proportional to the square of the flip angle. Therefore, if the flip angle is doubled, the energy deposition will increase by a factor of 2 squared, which equals 4.

This principle comes from the physics of MRI, where the flip angle is related to the amount of RF energy applied to the spins in the magnetic field. Doubling the flip angle increases the angle at which spins are flipped, resulting in greater energy transfer and consequently higher RF deposition. Understanding this relationship is critical for managing the safety and effectiveness of MRI scans.