CT SCAN, Lyme Disease, and RESP are all medical terms related to the diagnosis and treatment of various conditions. A CT SCAN is a type of imaging test that uses X-rays to create detailed pictures of the inside of the body. Lyme Disease is an infectious disease caused by bacteria that is spread through the bite of an infected tick. RESP stands for Registered Education Savings Plan, which is a Canadian government program that helps families save for their children's post-secondary education.