It depends on what the needle is made of, if it is titanium alloy or pure titanium, the material has no effect on MRI; general alloy material can be used for MRI, but it may produce artifacts, which affects the examination effect. However, if it is made of steel, or iron, it cannot be used for MRI. The reason why you can’t do it is: the MRI examination takes a long time, usually ranging from 10 to 30 minutes, and the MRI is a strong magnetic field at the same time, so if there are implants made of the above materials in the body, they will be attracted by the magnetic field, resulting in the displacement of the needle and causing damage to the patient’s body. MRI can clearly show whether the intervertebral discs and peripheral nerves are being compressed. If MRI is not possible, CT, EMG and other auxiliary tests can be chosen for a comprehensive assessment.