No 4D scan for your child?

i just got back from a routine pregnancy checkup wif my wife. However, there's something that was borthering me which's the doctor did not approve for a 4D ultrascan as it would affect the child due to the high radiation, which further could cause high fever and after i searched the internet, it appears that some urgues it would affect the ears too!! what a shocking news! well it is true that 4D scans reveals the most accurate and intriguing parts of your child organs. There must be somehow of high ultrasound takes place to reveal such high quality pictures. But is it really safe? ohhh i am so burndened by this matter.