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Radiology-Petra

Flashcards on LLRT Class @ Petra Allied Health

QuestionAnswer
ARRT American Registry of Radiologic Technologists
ASRT American Society of Radiologic Technologists
JRCERT Joint Review Committee on Education in Radiologic Technology
LMXO Limited X-Ray Machine Operator
Attenuation Absorbtion of X-Rays
Bucky Device that contains a Moving grid
Cassette Holds the X-Ray Film
Central Ray An imaginary line in the center of the X-Ray beam, used to align X-Ray tube to the Pt.
Collimator A Box-Like device attached under the tube housing, allows you to vary the size of the Radiation field
Computed Radiography(CR) Filmless system, films can be read directly from the computer, uses phosphor plates in the cassette.
Control Booth Protective booth containing the control console, Lead Lined for protection
Control Console Access point for the operator to set exposure times and factors to initiate exposure
Detent Built into tube supports, stops a moving part in a specific location
Image Receptor(IR) A system that contains X-Ray film and the film holder(cassette)
Latent Image The "unseen" image, the image before it is processed to a "visable" one
Radiation Field Cross section of the X-Ray beam and where it is used(4 squares)
Remnant Radiation Remains of the primary beam after it has been attenuated by matter, "Exit Radiation", the pattern of the remnant radiation creates the image.
Scatter Radiation Radiation that is scattered or created as a result of the attenuation of the primary X-Ray beam by matter. Travels in all directions and is very difficult to control, has less energy than the primary beam
Scatter Radiation Fog The unwanted image exposure caused by the scatter radiation.
Tissue Density Or mass, Bone has greater mass, therefore will absorb more radiation than less dense tissue such as fat, this varies the intensity of the X-Ray beam
Trendelenburg position The head is 15 degrees lower than the feet
Tube Housing Lead lined, surrounds the X-Ray tube. Some of the X-Rays are absorbed by the tube housing, X-Rays traveling in a useful direction exit the housingthrough the tube port
Tube Port Portal for which X-Rays travel and make up the X-Ray beam
Upright Cassette Holder Device to hold the IR in the upright position for radiography. Usually placed on a wall and adjustable in height. May incorporate a bucky or grid.
X-Ray Beam Cone shaped beam comming down from the tube port and housing, contains the central ray
X-Ray Tube The Source of X-Rays.
Ampere(A) Measures the rate or current flow.
Atom All matter is composed of, The Building Blocks, has neutrons, protons, and electrons
Binding Energy Energy that binds electrons to their own shell, electrons near the nucleus have more binding energy than those in outer shells
Chemical Compound A substance that consist of only one type of molecule, Ex: Water(H2O)
Circut A continuous path where it connects to a power supply
Conductor Electric charges that drift or flow in a vacuum, in certain gases, liquids, and metals, connected to make a circut
Current (I) indicates current, and is the quanity of electrons flowing in a circut. Measured in Amps(A) or MiliAmps(mA)
Electromagnetic Energy Consists of light, X-Rays, Radiowaves, microwaves, and other forms of energy. All have both electric and magnetic properties.
Electron Are identical to all protons and neutrons. They are located in the Orbital shells, Charge: -1
Element Substance made up of only one type of atom
Frequency The number of times per second that a crest passes a given point.
Intensifying Screens Used to expose radiographs, Greatly reduce the quanity of radiation necessary to produce an image. Are plates coated with fluorescent crystals.
Ionization When a neutral atom gains or loses an electron, the electric charges of its protons and electrons are no longer equal and produces and atom with an electric charge.
KiloVolts Peak(kVp)
Mass gdfg
Matter dfdfg
MilliApere(mA) fsdf
Molecules fgsfg
Neutron Inside the nucleus, Mass number: 1, Charge: 0,neither attracts or repels one another
Nucleus Neutrons and protons together form the nucleus of an atom and form the center, Electrons circle the nucleus in orbits called shells.
Photon The smallest possible unit of electromagnetic energy
Potential Difference Is the Force or strength of the electron flow in the current. Measured in Volts(V), or kVp(kiloVolts peak)
Proton Located in the Nucleus, Mass number: 1, Charge: +1, Positivly charged
Rectification fgsfg
Resistance(R) Is any propetry of the circut that hinders the flow of current. Measured in Ohms. Depends on 4 factors: Material, length, diameter and temperature.
Sine Wave a repeating wave due to the changes in the electromagnetic field form a pattern called, Sinusoidal form or Sine wave
Transformer A device used to produce the high voltage needed for X-Ray production
Volt(V) Unit to measure Potential difference,
Wavelength The distaance from one crest to another.
Created by: whitney walker