1 Introduction
29
MRI CONDITIONAL TESTS SPECIFICATIONS
The iVent™201 MR conditional has been performed to demonstrate that there are
no known hazards in a specified MR environment with specified conditions.
The specified MR environment was:
Model:
Magnetom Trio, Siemens Medical Solutions, Erlangen, Germany, 3
Tesla, horizontal static magnetic field, active shielded
Image frequency:
123.192952 MHz
Gradient System:
max. 40 mT/m, Slew rate: 200 mT/m/ms
Software:
Numaris/4, syngo MR 2004A 4VA25A
Coil:
Body coil for transmitting & receiving signals
Field Strength:
3 Tesla
Spatial gradient:
0.12 mT/m
dB/dt
200mT/m/ms
RF:
13-231 Watts
SAR:
0.2 – 92.2
Spin echo:
SE 2D
Time of echo (TE):
20 ms
Time of repetition
(TR):
1000 ms
Field of view (FoV):
400 x 400mm
Matrix
256 x 256 pixel
FoV phase:
100%
Flip angle
90°
Bandwidth/ Pixel:
100 Hz
Slice thickness:
5 mm
No. of slices:
1
Slice orientation:
Coronal
No. of averages:
1
Phase encoding:
Right –left (RL)
iVent™ 201
configuration during the test:
Ventilation Type:
SIMV Volume Control
Tidal Volume:
500mL
PEEP:
5 cmH20
FiO2:
50
Power source:
AC and battery
Distance from
isocenter:
100 Gauss (approximately 3 meters from the isocenter, this field
strength must be measured with a gauss meter)
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