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Radiologic technologists take x rays and administer nonradioactive materials into
patients’ bloodstreams for diagnostic purposes.
Radiologic technologists also referred to as radiographers, produce x-ray
films (radiographs) of parts of the human body for use in diagnosing medical problems.
They prepare patients for radiologic examinations by explaining the procedure, removing
jewelry and other articles through which x rays cannot pass, and positioning patients
so that the parts of the body can be appropriately radiographed. To prevent unnecessary
exposure to radiation, these workers surround the exposed area with radiation protection
devices, such as lead shields, or limit the size of the x-ray beam. Radiographers
position radiographic equipment at the correct angle and height over the appropriate
area of a patient’s body. Using instruments similar to a measuring tape, they
may measure the thickness of the section to be radiographed and set controls on
the x-ray machine to produce radiographs of the appropriate density, detail, and
contrast. They place the x-ray film under the part of the patient’s body to
be examined and make the exposure. They then remove the film and develop it.
Radiologic technologists must follow physicians’ orders precisely and conform
to regulations concerning the use of radiation to protect themselves, their patients,
and their coworkers from unnecessary exposure.
Experienced radiographers may perform more complex imaging procedures. When performing
fluoroscopies, for example, radiographers prepare a solution of contrast medium
for the patient to drink, allowing the radiologist (a physician who interprets radiographs)
to see soft tissues in the body.
Some radiographers specialize in computed tomography (CT), and are sometimes referred
to as CT technologists. CT scans produce a substantial amount of cross-sectional
x rays of an area of the body. From those cross-sectional x rays, a three-dimensional
image is made. The CT uses ionizing radiation; therefore, it requires the same precautionary
measures that radiographers use with other x rays.
Radiographers also can specialize in Magnetic Resonance Imaging as an MR technologist.
MR, like CT, produces multiple cross-sectional images to create a 3-dimensional
image. Unlike CT, MR uses non-ionizing radio frequency to generate image contrast.
Another common specialty for radiographers specialize in is mammography. Mammographers
use low dose x-ray systems to produce images of the breast.
In addition to radiologic technologists, others who conduct diagnostic imaging procedures
include cardiovascular technologists and technicians, diagnostic medical sonographers, and
nuclear medicine technologists