Which set of parameters results in the lowest heating potential?

The selected answer reflects the set of parameters that would likely result in the lowest heating potential during a magnetic resonance imaging (MRI) procedure. In assessing heating potential, several factors are particularly important:

1. Repetition Time (TR): A longer TR allows more time for tissues to cool down between successive radiofrequency (RF) pulses, which can minimize heat accumulation. The option with the longest TR (2400 ms) indicates a greater cooling period, which helps reduce overall heating during sequences.

2. Pulse Duration: Shorter pulse durations reduce the amount of energy deposited into the tissue in a single RF pulse. In the chosen answer, a 1 ms pulse duration allows more rapid delivery of RF energy, which minimizes the thermal burden on the tissue compared to longer pulse durations.

3. Flip Angle: A lower flip angle results in less RF energy being used for excitation, which also contributes to reduced heating. In the correct choice with a flip angle of 100 degrees, the energy input to create the magnetic resonance signal is lower than in cases with higher flip angles.

Considering these factors, the set of parameters in the correct answer harmonizes the three aspects—long TR, short pulse duration, and moderate flip angle—to achieve the