Selecting the ECG Lead Cable and Quadtrode Electrode Type
ECG lead cables and Quadtrode electrodes are proton emissions compliant, will not distort the
MR image, and are designed to provide the maximum patient safety and MRI performance:
Expression MR400 Instructions for Use Monitoring ECG 5‐5
Begin scan sequence and observe the ECG waveform.
If the ECG waveform becomes compromised during scanning, then
change the lead view and/or the Filter Mode on the MR400.
ECG performance during MRI scanning can be further improved by
modifying scan sequence parameters at the MRI console. Changing
any of these parameters directly alters image quality so precaution
must be taken to not overwhelmingly affect the desired image
After scanning, disconnect the wECG module from the patient.
Then store the wECG module in the module holder. Loop the cable
trunk with foam insulator then secure it using the Velcro storage
strap to keep the excess cable length from touching the floor; see
Only use the specified ECG lead cables with the MR400, as these are specially constructed
to avoid patient heating by reducing the amount of radio frequency (RF) energy that can
flow through the wires and with a shorter length to reduce the potential for cable looping.
The type of lead cable needed will depend upon the type of Quadtrode electrode being
Only use the specified Quadtrode electrode with the MR400, as this will minimize the
possible risk of electrode heating during MRI procedures and reduce the amount of MRI‐
generated artifacts on the ECG waveform. The type of Quadtrode electrode needed will
depend generally upon the patient type, gender and weight. (Regardless of the type, the
Quadtrode electrode will be considered a single item when discussed in this text.)
Increase TE (Echo Time)
Increase TR (Repetition Time)
Increase TI (Inversion Time)
Increase / change the imaging plane (for example, sagittal to
Turn off fat suppression
Decrease the PNS level
Decrease the gradient strength