RPROCH ENDTERM Flashcards
A type of x-ray tube that is located under the examining table
Fluoroscopic x-ray tube
Type of x-ray tube that is attached to overhead movable crane and it permits easy positioning of tube & aiming the x-ray beam
Radiographic x-ray tube
A component of fluoroscope that selects the mA & kvp of the machine
x-ray generator
A component of fluoroscope that converts electric energy provided by generator
x-ray tube
A component of fluoroscope that converts incident x-rays to minified visible light image of high intensity
Image intensifier
A component of fluoroscope that converges image
Focusing lens
A component of fluoroscope that records image
Video camera
A component of Fluoroscope that captures real time image & displays
Charged-coupled device (CCD)
Converts x-ray beam to visible light image
Image intensifier tube
Approx. length of II tube and its potential difference
20 cm
25,000v
An element of II tube that converts x-ray to visible light photons
Input phosphor
It is made up of Cesium
Input phosphor
Why is cesium used in input phospor
increases spatial resolution
An element of II tube that converts light to electrons; emits electrons when illuminated by input phosphor
Photocathode
Photocathode is composed of _ & _ compounds
Cesium & Antimony
An element of II tube that has a series of lenses containing positive charges and maintains proper focus & kinetic energy of photoelectrons; minifies electrons
Electrostatic focusing lens
An element of II tube that attracts & accelerates electrons towards output screen and is donut shaped
Accelerating anode
The accelerating anode has _ potential difference
25,000 v
An element of II tube that is the site where accelerated electrons interact & produce light
Output Phosphor
Output Phosphor is made up of_
ZCS
Zinc Cadmium Sulfide
The process that reduces the contrast of II tube ; internal scatter radiation in form of x-rays, electron, and light
Veiling glare
Veiling glare is also known as
Scattering light
It is the reduction or fall-off in brightness; unequal collection of light in the center of image
Vignetting
Produces different magnification in images and provides flexibility in all fluoroscopic examinations
Multifield image intensification
Trifield tube common sizes
12 17 25
Magnification mode results in _ _ & _
better spatial resolution, contrast, & higher patient radiation dose
Type of radiation that is not harmful and not capable of ionizing medium
Non-ionizing radiation
Type of radiation that is harmful and capable of ionizing
Ionizing Radiation
3 Ionizing radiation
X- ray
Gamma Ray
Alpha Radiation
4 Non-ionizing radiation
Radiofrequency
Infrared
Ultraviolet light
Visible light
Type of ionizing radiation that travels in a space possessing either mass or charge; emitted by radioactive substance
Particulate Radiation
What energy does particulate radiation possesses
Kinetic energy
Type of ionizing radiation that travels in waveform and at the speed of light; it has no mass & no charge accompanied by electrical & magnetic field
Electromagnetic Radiation
What energy does Electromagnetic Radiation possess
Potential energy
Particulate Radiation includes:
Alpha
Beta
Neutrons
other nuclear fragments
Electromagnetic Radiation includes:
X-ray
Gamma rays
What wavelength, frequency, & and energy does Radiofrequency Infrared Light Visible Light Ultraviolet Light have
Longer wavelength
low frequency
low energy
What wavelength, frequency, energy does x-ray & gamma ray have
Shorter wavelength
high frequency
high energy
A radiation that occupies the smallest portion of EMR spectrum and the only portion that can be sensed
Visible light
It is produced when fast moving electrons interact with high atomic material
X-ray
Emitted during isometric transition in radioactive nuclides
Gamma Ray
A source of ionizing radiation with 18% radiation acquired by humans
Man-made or Artificial
source of ionizing radiation with 82% acquired and their respective percent
Natural or Background
External 60%
Internal 22%
Ionizing of air by x-ray or gamma ray ; divides number of ions formed (State old name & new name)
Exposure (X)
Old name: Roentgen
New name: Coulomb/kilogram
Unit referring to the dose required by patients (Old name & new name)
Absorbed Dose (D)
Old name: rad
New name: gray
Unit used that refers to the dose received by radiation workers. (Old & new name)
Equivalent Dose (H)
Old name: rem
New: Sievert
Time rate of decay of radioactive material (Old & New name)
Activity (A)
Old name: Curie
New name: Becquerel
