Patients can be safely imaged in the MRI scanner with conventional versions of which monitor?

Patients can be safely imaged in the MRI scanner with conventional versions of which monitor?

• A. Pulmonary artery catheter with cardiac output probe
• B. Foley catheter with temperature probe
• C. Electrocardiogram electrodes
• D. Arterial line

Answer: (D)

The key idea is MRI safety with monitoring devices: the strong magnetic field and RF energy can cause ferromagnetic components to move and long leads to heat or pick up noise. An arterial line fits best with conventional equipment because the pressure transducer can stay outside the MRI bore, connected to the catheter inside the patient by a short, nonconductive tubing system. The actual sensing device is outside the magnetic field, and the catheter/tubing inside the patient are passive with minimal metal, reducing risk of magnetic attraction, heating, or large RF-induced artifacts. In contrast, other monitors often involve more complex electronics, metal components, or long cables that can heat up or distort signals in the MRI. So, conventional arterial line monitoring can be used safely during MRI imaging, whereas the other options typically require MRI-compatible hardware or avoidance.

The key idea is MRI safety with monitoring devices: the strong magnetic field and RF energy can cause ferromagnetic components to move and long leads to heat or pick up noise. An arterial line fits best with conventional equipment because the pressure transducer can stay outside the MRI bore, connected to the catheter inside the patient by a short, nonconductive tubing system. The actual sensing device is outside the magnetic field, and the catheter/tubing inside the patient are passive with minimal metal, reducing risk of magnetic attraction, heating, or large RF-induced artifacts. In contrast, other monitors often involve more complex electronics, metal components, or long cables that can heat up or distort signals in the MRI. So, conventional arterial line monitoring can be used safely during MRI imaging, whereas the other options typically require MRI-compatible hardware or avoidance.