Question

In an MRI scan, a higher magnetic field requires higher frequency radio waves to resonate with the nuclear type whose density and location is being imaged. What effect does going to a larger magnetic field have on the most efficient antenna to broadcast those radio waves? Does it favor a smaller or larger antenna?

Short answer

It is preferable to have a larger antenna.

Step-by-step solution

Define magnetic field

Magnetic field lines are never crossed. The strength of the field is determined by the density of the field lines.

Explanation

The patient is enveloped by a magnetic field during an MRI scan. As we all know, water includes hydrogen atoms and is abundant in the human body. When a hydrogen atom is put in a magnetic field, it produces radio-frequency pulses because hydrogen acts as a proton.

A different source of the magnetic field is used to change the field. And energy is created when hydrogen is relaxed. This energy is transformed into a picture. The secondary magnetic field in this case adjusts with time as needed. As a result, for a better image, the radio frequency should be consistent.

In this case, a bigger antenna is chosen over a smaller antenna for better transmission.

Therefore, it is preferable to have a larger antenna.