Due to the connection between electric and magnetic phenomena, the magnetic field generated by an MRI machine can be used to excite the positive charges in hydrogen atoms. These hydrogen atoms emit radio waves that can be used to form an image of their locations. The main source of hydrogen atoms in the human body is water. Which of the following are limitations this method might place on the images that can be generated?

Select all that apply.


A
Detecting hydrogen atoms allows for certain parts of the body to be imaged better than others.
B
Areas without large amounts of water are harder to map.

C
Hydrogen is not present in the human body.