What is a common effect of gradient magnetic fields during an MRI scan?

During an MRI scan, gradient magnetic fields are utilized to spatially encode the MRI signal. One common effect associated with these changing magnetic fields is peripheral nerve stimulation. This occurs because the rapidly changing magnetic fields can induce electric currents in the body, particularly in the peripheral nerves. When these currents exceed a certain threshold, they can lead to sensations such as tingling or muscle contractions, which are often experienced by patients during scans.

This phenomenon is well-documented and is an important consideration in MRI safety protocols, as it can affect patient comfort and the ability to remain still during the procedure. Additionally, understanding this effect is crucial for technicians and healthcare providers to effectively communicate with patients about what to expect during an MRI.

Other options like increased blood pressure, reduced organ functionality, and increased muscle mass are not direct effects of gradient fields during an MRI scan. Increased blood pressure is more of a physiological response than a direct effect of the magnetic fields. Reduced organ functionality is not typically associated with MRI procedures, and increased muscle mass would not be a result of exposure to gradient fields in this context.