Radiology - Correct Answers The study of the uses of radioactive substances for visualizing the internal
structures of the body in order to diagnose and treat disease. It is divided into three specialties:
diagnostic radiology, radiation therapy, and nuclear medicine.
X-ray - Correct Answers An electromagnetic wave with a high energy level and short wavelength that
can penetrate solid objects. X-rays can be used in diagnosis and therapy
Digital X-ray - Correct Answers A form of X-ray imaging in which digital X-ray sensors are used instead of
traditional photographic film. They reduce processing time and also require less radiation to produce
images.
Magnetism - Correct Answers The ability of certain materials to attract iron and other metals.
Radioactive - Correct Answers Capable of emitting radiant energy; or giving off radiation as the result of
the disintegration of the nucleus of an atom.
Nuclear energy - Correct Answers Energy produced by fission of an atomic nucleus.
Radiopaque - Correct Answers Refers to something that does not permit the passage of X-rays. Bones
are relatively radiopaque
Contrast media - Correct Answers Radiopaque substances used in radiography to permit visualization of
internal structures.
-Contrast media include liquids, powders, and gases. They are administered orally, parenterally, and
rectally.
-A positive contrast medium is more dense than the surrounding tissue. Barium sulfate and iodine are
positive contrast media.
-A negative contrast medium is less dense than the surrounding area in the body. Air is a negative
contrast medium.
, Adverse effects of contrast media - Correct Answers Oral agents may cause skin rash, vomiting,
diarrhea, abdominal pain, or constipation. IV agents can cause urticaria (rash), skin reddening,
anaphylaxis, or death. Some individuals have allergies to iodine.
X-ray film - Correct Answers A special material with a sensitive emulsion layer that reacts when it is
exposed to radiation and thereby produces an image. Single-emulsion film is used to create images of
the extremities and the breasts.
Radiograph - Correct Answers An image recorded on film that has been exposed. An older term for
radiograph is roentgenogram, named after the discoverer of X-rays, Wilhelm Conrad Roentge
Film fog - Correct Answers An unwanted increase in the density of the emulsion either before or after
exposure to radiation. Heat, light, chemicals, and extraneous radiation can produce fogging, which
appears as darkened areas on the finished radiograph.
Artifacts - Correct Answers Extraneous marks and areas of increased or decreased density on film.
Artifacts interfere with the diagnostic value of the radiograph.
Cassette - Correct Answers A light-proof container that holds X-ray film and serves to intensify the
image.
Contrast - Correct Answers The visible difference between any two areas of radiographic density.
Roentgen - Correct Answers A unit used to measure X-ray dosage in air.
Rem - Correct Answers A unit used to measure X-ray dosage in human beings. It is an abbreviation of
Roentgen equivalent (in) man
Rad - Correct Answers A unit used to measure the actual absorbed dose of radiation.
Ionization - Correct Answers the process by which an atom becomes ionized (gains or loses electrons).
structures of the body in order to diagnose and treat disease. It is divided into three specialties:
diagnostic radiology, radiation therapy, and nuclear medicine.
X-ray - Correct Answers An electromagnetic wave with a high energy level and short wavelength that
can penetrate solid objects. X-rays can be used in diagnosis and therapy
Digital X-ray - Correct Answers A form of X-ray imaging in which digital X-ray sensors are used instead of
traditional photographic film. They reduce processing time and also require less radiation to produce
images.
Magnetism - Correct Answers The ability of certain materials to attract iron and other metals.
Radioactive - Correct Answers Capable of emitting radiant energy; or giving off radiation as the result of
the disintegration of the nucleus of an atom.
Nuclear energy - Correct Answers Energy produced by fission of an atomic nucleus.
Radiopaque - Correct Answers Refers to something that does not permit the passage of X-rays. Bones
are relatively radiopaque
Contrast media - Correct Answers Radiopaque substances used in radiography to permit visualization of
internal structures.
-Contrast media include liquids, powders, and gases. They are administered orally, parenterally, and
rectally.
-A positive contrast medium is more dense than the surrounding tissue. Barium sulfate and iodine are
positive contrast media.
-A negative contrast medium is less dense than the surrounding area in the body. Air is a negative
contrast medium.
, Adverse effects of contrast media - Correct Answers Oral agents may cause skin rash, vomiting,
diarrhea, abdominal pain, or constipation. IV agents can cause urticaria (rash), skin reddening,
anaphylaxis, or death. Some individuals have allergies to iodine.
X-ray film - Correct Answers A special material with a sensitive emulsion layer that reacts when it is
exposed to radiation and thereby produces an image. Single-emulsion film is used to create images of
the extremities and the breasts.
Radiograph - Correct Answers An image recorded on film that has been exposed. An older term for
radiograph is roentgenogram, named after the discoverer of X-rays, Wilhelm Conrad Roentge
Film fog - Correct Answers An unwanted increase in the density of the emulsion either before or after
exposure to radiation. Heat, light, chemicals, and extraneous radiation can produce fogging, which
appears as darkened areas on the finished radiograph.
Artifacts - Correct Answers Extraneous marks and areas of increased or decreased density on film.
Artifacts interfere with the diagnostic value of the radiograph.
Cassette - Correct Answers A light-proof container that holds X-ray film and serves to intensify the
image.
Contrast - Correct Answers The visible difference between any two areas of radiographic density.
Roentgen - Correct Answers A unit used to measure X-ray dosage in air.
Rem - Correct Answers A unit used to measure X-ray dosage in human beings. It is an abbreviation of
Roentgen equivalent (in) man
Rad - Correct Answers A unit used to measure the actual absorbed dose of radiation.
Ionization - Correct Answers the process by which an atom becomes ionized (gains or loses electrons).
