Can a learning disability be diagnosed with help of MRI, CT scan and EEG by a neurologist?

No. However, some tests such as an MRI or CT scan may be helpful in diagnosing a traumatic brain injury or other neurological damage that may be at least part of the cause for a learning disability. Some researchers are exploring the possibility of using those types of tests as part of a learning disability diagnosis, but at this time, a learning disability can only be diagnosed with psychological testing, administered by a licensed psychologist or psychiatrist.