1.
substance does not allow x-rays to pass through and appears white or light gray on the resulting film
2.
a substance that allows x-rays to pass through and appears black or dark gray on the resulting film
3.
tapping on the surface of the body to determine the density of the underlying structure
4.
a factor in the patient's condition that makes the use of a medication or specific treatment dangerous or ill advised
5.
ultrasound of the heart
