There are no side effects for children because the MRI uses a magnetic field to scan and does not use X-rays, so it has very little effect on the child. Because of the length of time and noise, children are less cooperative during an MRI, so they need to be sedated before the test. This test can be a good aid in the diagnosis of the disease and the effectiveness of treatment. Generally, cranial MRI is required for children born with high risk factors, developmental delay, convulsions, and suspected occupational lesions.