Flashcards on LLRT Class @ Petra Allied Health
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| ARRT | American Registry of Radiologic Technologists
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| ASRT | American Society of Radiologic Technologists
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| JRCERT | Joint Review Committee on Education in Radiologic Technology
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| LMXO | Limited X-Ray Machine Operator
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| Attenuation | Absorbtion of X-Rays
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| Bucky | Device that contains a Moving grid
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| Cassette | Holds the X-Ray Film
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| Central Ray | An imaginary line in the center of the X-Ray beam, used to align X-Ray tube to the Pt.
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| Collimator | A Box-Like device attached under the tube housing, allows you to vary the size of the Radiation field
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| Computed Radiography(CR) | Filmless system, films can be read directly from the computer, uses phosphor plates in the cassette.
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| Control Booth | Protective booth containing the control console, Lead Lined for protection
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| Control Console | Access point for the operator to set exposure times and factors to initiate exposure
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| Detent | Built into tube supports, stops a moving part in a specific location
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| Image Receptor(IR) | A system that contains X-Ray film and the film holder(cassette)
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| Latent Image | The "unseen" image, the image before it is processed to a "visable" one
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| Radiation Field | Cross section of the X-Ray beam and where it is used(4 squares)
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| 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.
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| 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
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| Scatter Radiation Fog | The unwanted image exposure caused by the scatter radiation.
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| 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
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| Trendelenburg position | The head is 15 degrees lower than the feet
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| 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
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| Tube Port | Portal for which X-Rays travel and make up the X-Ray beam
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| 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.
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| X-Ray Beam | Cone shaped beam comming down from the tube port and housing, contains the central ray
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| X-Ray Tube | The Source of X-Rays.
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| Ampere(A) | Measures the rate or current flow.
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| Atom | All matter is composed of, The Building Blocks, has neutrons, protons, and electrons
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| Binding Energy | Energy that binds electrons to their own shell, electrons near the nucleus have more binding energy than those in outer shells
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| Chemical Compound | A substance that consist of only one type of molecule, Ex: Water(H2O)
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| Circut | A continuous path where it connects to a power supply
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| Conductor | Electric charges that drift or flow in a vacuum, in certain gases, liquids, and metals, connected to make a circut
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| Current | (I) indicates current, and is the quanity of electrons flowing in a circut. Measured in Amps(A) or MiliAmps(mA)
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| Electromagnetic Energy | Consists of light, X-Rays, Radiowaves, microwaves, and other forms of energy. All have both electric and magnetic properties.
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| Electron | Are identical to all protons and neutrons. They are located in the Orbital shells, Charge: -1
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| Element | Substance made up of only one type of atom
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| Frequency | The number of times per second that a crest passes a given point.
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| Intensifying Screens | Used to expose radiographs, Greatly reduce the quanity of radiation necessary to produce an image. Are plates coated with fluorescent crystals.
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| 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.
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| KiloVolts Peak(kVp) |
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| Mass | gdfg
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| Matter | dfdfg
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| MilliApere(mA) | fsdf
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| Molecules | fgsfg
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| Neutron | Inside the nucleus, Mass number: 1, Charge: 0,neither attracts or repels one another
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| Nucleus | Neutrons and protons together form the nucleus of an atom and form the center, Electrons circle the nucleus in orbits called shells.
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| Photon | The smallest possible unit of electromagnetic energy
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| Potential Difference | Is the Force or strength of the electron flow in the current. Measured in Volts(V), or kVp(kiloVolts peak)
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| Proton | Located in the Nucleus, Mass number: 1, Charge: +1, Positivly charged
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| Rectification | fgsfg
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| 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.
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| Sine Wave | a repeating wave due to the changes in the electromagnetic field form a pattern called, Sinusoidal form or Sine wave
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| Transformer | A device used to produce the high voltage needed for X-Ray production
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| Volt(V) | Unit to measure Potential difference,
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| Wavelength | The distaance from one crest to another.
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