The use of MRI scans is logical and relatively safe.Especially for head injuries.
And as I pointed out they can also save lives. If someone has a bran bleed for example from trauma or an aneurysm this can kill them or at least cause a stroke if it goes undetected. And an MRI is the safest and best method for determining these kind of problems. But a few posters here seem to think that people should risk injury or death rather than be subjected to an MRI, which they cannot provide any evidence to as being dangerous. This is why people need to take advice from these individuals with a grain of salt.