What is the best imaging technique to show if my baby has a brachial plexus injury?

No imaging required: In general, radiographic imaging is not required to make the diagnosis of a brachial plexus injury. Plain x-rays, and even ct scans are unlikely to show the injury, which is often too small to discern by these techniques. If imaging is indicated, it is to rule out other injuries, such as a broken bone or a paralyzed diaphragm.

MRI: Mri's can better image the cervical area and pinpoint possible injury.

See below: The MRI scan has the best potential to identify abnormalities in the brachial plexus. An EMG is a functional test that can evaluate peripheral nerves as well.