Radiographic Exposure
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Define contrast | show 🗑
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| Define quantity | show 🗑
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| Define the relationship between ma and tube current | show 🗑
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| show | Directly proportional
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| Describe the relationship between exposure time and density | show 🗑
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| show | Directly proportional
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| Describe the relationship between mAs and density | show 🗑
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| show | Inversely proportional
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| Describe the relationship between SID and mR | show 🗑
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| Identify 4 imaging characteristics controlled by SID | show 🗑
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| Define the reciprocity law. | show 🗑
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| show | If kVp is increased by 15%, mAs will be halved. If kVp is decreased by 15%, mAs will be doubled.
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| show | mAs
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| show | new mAs/old mAs = new D^2/old D^2
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| What is meant by low contrast? | show 🗑
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| show | few shades of gray
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| show | lower the kVp
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| How do you get a lower contrast on a film? | show 🗑
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| show | mA, kVp, distance and time
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| show | the penetrability of the beam
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| show | kVp
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| What is the controlling factor of density? | show 🗑
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| show | Directly proportional
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| What is the function of contrast? | show 🗑
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| What is meant by short scale contrast? | show 🗑
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| What is meant by long scale of contrast? | show 🗑
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| show | The range of differences in the intensity of the remnant x ray beam after it has been attenuated by the patient.
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| What is image receptor contrast? | show 🗑
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| show | H & D curve, image density, processing, digital image receptors, intensifying screens
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| show | kVp, amount of tissue irradiated, type of tissue irradiated.
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| show | Under or over exposure
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| How does focal spot size affect radiographic contrast | show 🗑
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| How does the anode heel effect affect radiographic contrast? | show 🗑
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| show | Inversely related.
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| How does beam restriction (collimation) affect contrast? | show 🗑
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| show | Directly related.
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| show | Involuntary and voluntary.
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| show | pain, breathing, chills, spasms
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| What is the typical range for O.D? | show 🗑
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| show | By a factor of 4 (inversely).
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| show | metal, enamel, bone, muscle, fluids, fat and air/gas
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| show | nervousness, discomfort, fear, excitability
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| show | The overall blackness on the image. Also described as the amount of black metallic silver on a film.
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| show | Unwanted density on the film.
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| The total quantity of x rays produced in an x ray beam is determined by the _____. | show 🗑
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| show | Source to image distance (SID)
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| show | long scale contrast
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| Two factors that directly control the amount of x rays emitted by the tube are? | show 🗑
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| The shorter the SID, the __________ the intensity of the xray beam? | show 🗑
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| show | The quantity of x rays reaching the image receptor.
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| Scattered radiation has what effect on radiographic contrast? | show 🗑
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| Describe the relationship between filtration and density. | show 🗑
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| show | inversely related
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| Describe the relationship between thickness and density. | show 🗑
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| Describe the relationship between grid ratio and density. | show 🗑
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| Describe the relationship between thickness and contrast. | show 🗑
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| Describe the relationship between processing time and contrast | show 🗑
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Created by:
akd72012
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