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| Another name for invisible image |
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| The three acronyms for distance between x-ray tube and image receptor: |
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| The blank is used to sensitize the film for density |
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| The property of certain materials to absorb x-ray and emit light |
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| If the kV is too high the radiograph will be too dense |
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| The base material for x-ray film |
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| Film processing includes these steps: |
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| Developer, fixer, wash and dry |
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| Where on the processor is the replenishment rate controlled |
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| The penetrating power is controlled by |
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| To double the exposure you can double the mA or |
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| Refers to the overall darkness of a radiograph |
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| What controls the number of x-rays emitted |
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| Lightening like lines on a radiograph are caused by what |
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| Small white spots on a radiograph are caused by |
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| What color is calcium tungstate film |
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| What causes yellow color after processing film |
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| Fogging of the x-ray by a safelight depends on |
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Definition
| exposure time and distance |
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Definition
| radiation, chemical, temp, light, age of film/cassette |
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| Chemistry which is used to maintain processing solution |
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| In the processor one is acidic and one is alkaline |
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Definition
| fixer is acidic and developer is alkaline |
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Term
| The exposed silver bromide crystals are reduced to metallic silver in |
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Definition
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| Whats the purpose of the fixing agent |
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Definition
| to stop developing film. make the image more permanent. rinse of remaining undeveloped/underexposed AgBr away |
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| If you have smaller crystals do you have smaller or faster speed |
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Definition
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| If the developer temp is too low it causes |
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Definition
| causes the radiograph to be light |
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| Small half moon marks on a radiograph are caused by |
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| Contaminated developer what do you do with? |
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| When were x-rays discovered |
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| invisible, electrically neutral, have no mass, travel at the speed of light and cannot be optically focussed |
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| What is secondary radiation? |
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Definition
| Radiation after it has interacted with matter aka photo electric affect |
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| X-radiation is part of which spectrum |
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| the ability to withstand high heat loads relates to |
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| What interaction produces x-rays |
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| What is thermionic emission? |
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Definition
| refers to the boiling off of electrons from the filament |
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Definition
| unit used to measure the tube current |
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| what is the equation for mAs |
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| What is the anode heel affect? |
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Definition
| angle of target. X-ray beam has greater intensity on the cathode side |
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Definition
| thicker part of the wedge is lined up with the thinner part of the body part |
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Definition
| has a double wedge with a dent in the middle |
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Term
| The cloud of electrons that forms before x-ray production is referred to as: |
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| which primary factor influences both the quantity and quality of x-rays |
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| The process of image formation is |
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Definition
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| What causes the film to be yellow and greasy? |
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Definition
| exhausted fixer/ chemicals |
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Term
| the purpose of developer? |
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Definition
| turn latent image into manifest image |
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| What is used to check the accuracy of the processor? |
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| to double the density what rule do you use? |
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| What is the base of film and screens made of? |
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Definition
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| Which processes occur during beam attenuation? |
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Definition
| Absorption, photon transmission and scattering |
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Term
| the ability of an x-ray photon to remove an atoms electron is a characteristic known as |
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| x-ray interaction responsible for scattering |
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| Exit radiation is composed 2 components |
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Definition
| transmitted and scattered radiation |
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Term
| imaging the movement of internal structures |
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| what interaction creates unwanted density known as fog |
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| what has a direct proportional relationship with quantity of xrays produced |
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| what has to do with quality of xrays |
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Term
| SID and mAs has a direct or indirect relationship? |
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Definition
Directly proportional
increasing SID = increasing mAs |
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Term
| Name the 3 layers of film |
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Definition
| Supercoat, emulsion and base layer |
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Term
| What does the gurney mott theory explain? |
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Definition
| How a latent image is formed |
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| What is in the emulsion layer of film? |
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Definition
| protective, phosphor, reflective and base layer |
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Term
| When are blue screens used? |
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Definition
| only on extremities for table top |
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Term
| film screen contact test uses? |
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Term
| The radiation and light sensitive layer of radiographic film is what layer? |
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Term
| according to the gurney mott theory of latent image formation electrons liberated by radiation or light exposure are attracted to? |
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| Finished radiographs should retain what pecentage of moisture? |
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Term
| the type of roller repsonsible for moving the film from teh bottom of the tank upward is ? |
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Term
| the type of roller responsible for moving the film from one tank to another is? |
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Term
| Under what conditions should radiographic film be stored? |
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Definition
Temp= 50-70 degrees
humidity= 40-60 % |
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Term
| a device used to make a step wedge on a film |
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| a device used to determine the amount of blackness on the film after processing |
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| denisity that has best information for diagnose |
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