X-rays are a form of radiation, like light or radio waves, that
can be focused into a beam, much like a flashlight beam. Unlike a beam of
light, though, X-rays can pass through most objects, including the human body.
When X-rays strike a piece of photographic film, they can produce
a picture. Dense tissues in the body, such as bones, block (absorb) many of the
X-rays and appear white on an X-ray picture. Less dense tissues, such as
muscles and organs, block fewer of the X-rays (more of the X-rays pass through)
and appear in shades of gray. X-rays that pass only through air appear black on
an X-ray picture.
Many centers are changing from film to using
computers for digital pictures.
Adam Husney, MD - Family Medicine & Howard Schaff, MD - Diagnostic Radiology
PeaceHealth endeavors to provide comprehensive health care information, however some topics in this database describe services and procedures not offered by our providers or within our facilities because they do not comply with, nor are they condoned by, the ethics policies of our organization.