Siemens MAGNETOM Skyra fit Operator's Manual page 17

Fields
Static magnetic field
Gradient fields
RF fields
Static magnetic field/controlled
access area
Gradient fields
MAGNETOM Skyra fit | syngo MR E11
Print No. M6-04401.621.02.02.02
Most serious hazards
Movement by implants and prostheses in the body
Attraction, alignment, and projectile-like acceleration of magnetizable
objects
( Page 18 Safety instructions on the static magnetic field)
Peripheral nerve stimulation
( Page 20 Safety instructions on RF and gradient fields)
Warming of body tissue
( Page 20 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.
The static basic field is generated by a superconductive magnet and
may extend beyond the examination room (walls, ceilings).
In order to minimize the hazards mentioned, the controlled access
area of the basic field is identified on the floor (0.5 mT line). Outside
the controlled access area, the magnetic flux density is less than
0.5 mT. See:
Linearly rising additional fields of variable strength - gradient fields -
are superimposed on the static main magnetic field in three different
orientations. They may cause shifts in charge in the patient's tissue
and lead to peripheral nerve stimulation.
RF fields The nuclear spins of the body tissue are stimulated via pulsed
electromagnetic RF fields. These RF pulses are generated by an RF
transmit amplifier and transferred via RF coils to the object to be
measured.
System owner manual
Safety 2
17