Medtronic 97702 Instrucciones De Uso página 15

Table 1. Full-body eligible – MRI equipment and scan requirements (continued)
RF power
Gradients
Active scan time limits
Landmark (isocenter
location)
Use Normal operating mode.
Specific absorption rate (SAR):
▪
Whole body SAR: must be ≤ 2.0 W/kg (0.91 W/lb) as
reported by the MRI equipment.
▪
Head SAR: must be ≤ 3.2 W/kg (1.45 W/lb) as reported by
the MRI equipment.
w
Warning: Do not conduct MRI scans in the following
modes:
▪
first level controlled operating mode
▪
second level controlled operating mode (ie, research mode)
These modes allow higher levels of RF energy and may
cause excessive heating, which can result in tissue damage
or serious patient injury.
Gradient systems with a maximum gradient slew rate
performance per axis of 200 T/m/s or less.
w
Warning: Do not use gradient systems producing gradient
slew rates greater than 200 T/m/s because they have not
been tested and could cause increased risk of induced
stimulation (resulting in shocking or jolting sensations,
discomfort, or pain for the patient) or heating of the
neurostimulator.
MRI scan durations should not exceed a total of 30 minutes of
active scan time within a 90-minute window (within every 90-
minute window should be a total of 60 minutes of nonscan
time).
w
Warning: Do not exceed a total of 30 minutes of active scan
time within a 90-minute window. Exceeding the active scan
time duration increases the risk of tissue heating.
No restrictions. All anatomical locations can be scanned.
MRI guidelines for Medtronic neurostimulation systems for chronic pain English 13