| Component | Function | Safety concerns |
| Main magnet | Creates a large magnetic field across the field of view to enable magnetic resonance signal from tissue sufficient for imaging | - Translation and torque of ferromagnetic objects
- Interference with electronic device function
|
| Gradient coils | Creates rapidly changing magnetic field gradients to encode spatial information on the image | - Current induction and heating in metal implants
- Interference with electronic device function
- Noise and acoustic injury
|
| Radiofrequency coils | Serves as signal receivers and sometimes also transmitters, by creating an electromagnetic field at the resonant frequency of the nuclei | - Current induction and heating in metal implants
- Interference with electronic device function
|
