Positioning the wECG module
The wECG module must be kept outside the system bore or image distortion may result.
This is a result of proton emissions from the ECG module.
Depending upon your region of interest (ROI) and the largest field of view being examined (see
illustration below), follow these guidelines to ensure the best performance of the wECG module,
especially during harsh scan sequences:
Expression MR400 Instructions for Use Monitoring ECG 5‐21
For static field (B0) compliance, keep the module at least 28 cm (11 inches) outside the
MRI field of view.
Considering the scan to be performed, place the module on or near the patient and as
close to the bore iso‐center as possible.
Place the module as close to the bore opening as possible. (If the module can be placed
outside the bore, positioning at the bore iso‐center is not necessary.)
Place the module on a cushioned surface to minimize MR vibrations.
For B0 compliance always keep the
wECG module 28 cm from the edge
of the FOV.
For example, a lower abdomen scan
places the module at an acceptable
distance of 30 cm (considering the
length of the ECG cable)