RADT 142 unit 1 Exam Questions and Answers
Filtration - Answer-Metal filters absorb low-energy x-rays before they reach the patient. These x-rays have little diagnostic value.
Collimation - Answer-Restricts the useful x-ray beam to the part of the body to be imaged.
Intensifying screens - An...
Filtration - Answer-Metal filters absorb low-energy x-rays before they reach the patient.
These x-rays have little diagnostic value.
Collimation - Answer-Restricts the useful x-ray beam to the part of the body to be
imaged.
Intensifying screens - Answer-Changes x-ray energy to light energy so that x-ray
images can be better visualized.
Protective apparel - Answer-Lead-impregnated material is used to make gloves and
aprons worn by radiologists and radiologic technologists.
Angiography - Answer-Radiographic study of blood vessels using contrast media.
Computed tomography (CT, CAT) - Answer-Uses ionized radiation to get cross-
sectional images. Can do 3D reconstruction.
Magnetic resonance imaging (MRI) - Answer-Uses magnetic and radio waves to
produce images without using ionizing radiation. Images can be taken cross-sectional or
whole body.
Nuclear medicine - Answer-Uses sensitive scanner to detect the radioactive isotopes
being emitted from the body.
Mammography - Answer-Uses low radiation to image breast tissue and detect cancers
in the breast.
Radiation therapy - Answer-uses radiation to treat and destroy cancer cells. Uses high
levels of radiation.
Fluoroscopy - Answer-Type of x-ray radiation that uses a continuous x-ray beam to take
real time images. It was discovered in 1898 by Thomas Edison.
gonadal shielding - Answer-Uses lead-impregnated material to protect the gonads of
patients within child-bearing age.
Protective barriers - Answer-The radiographic console is always located behind a lead-
lined barrier with leaded glass windows.
, Erythema, Alopecia, Anemia, and Cataracts - Answer-Radiation injuries
Matter - Answer-Anything that occupies space and has mass. It can exist in any one of
four states: liquid, solid, gas, and plasma.
Energy - Answer-The ability to do work
Potential energy - Answer-Ability to do work by virtue of position.
Kinetic energy - Answer-The energy of motion.
Chemical energy - Answer-Energy released by a chemical reaction.
Electrical energy - Answer-The work that can be done when an electron moves.
Radiation - Answer-Transfer of energy, through space or a material, away from the
source.
Non-ionizing radiation - Answer-Type of radiation that is weak and non-harmful such as
radio or microwave radiation.
Ionizing radiation - Answer-Type of radiation that is harmful such as x-rays and gamma
rays.
Electromagnetic radiation with extremely short wavelengths. They can pass through
many materials. - Answer-What are x-rays?
November 8, 1895 - Answer-Date of the discovery of x-rays.
Crookes tube - Answer-Large partially vacuumed glass tube, through which cathode
rays were conducted. Roentgen used a type of this tube, which he enclosed with black
photographic paper, to discover x-rays.
Barium Platinocyanide - Answer-A fluorescent material that happened to be on a plate
lying several meters away from where Roentgen was experimenting with his Crookes
tube. The material began to glow when cathode rays where conducted through the tube.
First radiograph - Answer-Anna Bertha Roentgen's hand that was exposed for 30
minutes.
Poly energetic - Answer-Properties of x-rays: 1
Highly penetrating - Answer-Properties of x-rays: 2
Invisible - Answer-Properties of x-rays: 3
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