Common/Permanently Existing Hazards; Electromagnetic Fields - Siemens MAGNETOM Avanto Operator's Manual

2 Safety
Fields
Static magnetic field
Gradient fields
RF fields
18
2.2

Common/permanently existing hazards

The frequency at which the potential hazards mentioned in this
section lead to accidents is still too high. Therefore, it is especially
important to observe the instructions on how to avoid these
dangerous situations.
The most significant hazards include:
◾

Electromagnetic fields

◾ Contraindications
◾ Mechanical hazards
◾ Incompatible devices
2.2.1 Electromagnetic fields
In the examination room, there are different kinds of electro-
magnetic fields and the resulting risks.
Most serious hazards
Movement by implants and prostheses in the body
Attraction, alignment, and projectile-like acceleration of magnetizable
objects
( Page 19 Safety instructions on the static magnetic field)
Peripheral nerve stimulation
( Page 21 Safety instructions on RF and gradient fields)
Warming of body tissue
( Page 21 Safety instructions on RF and gradient fields)
All persons (e.g. patients, physicians, operating and cleaning

personnel, accompanying persons, and rescue personnel/fire
fighters) are exposed to these fields in the examination room.
Therefore, all limits and safety measures regarding
electromagnetic fields equally apply to patients and MR workers.
◆ Observe prohibition signs in the area near the entrances to the MR
system and the controlled access area.
MR System | Operator Manual
Print No. MR-01501G.621.02.02.02