... The tests below are needed to measure baseline levels — the body’s normal readings — and check how well the organs are working: Computed tomography (CT) scans use rotating X-rays to detect tumors in the brain, lungs, and kidneys. ...
... The tests below are needed to measure baseline levels — the body’s normal readings — and check how well the organs are working: Computed tomography (CT) scans use rotating X-rays to detect tumors in the brain, lungs, and kidneys. ...