Ch 28
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| _______ is the degree of overall blackening of the film. (photographic property that comprise visibility of detail) | show 🗑
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| show | brightness
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| ________ describes the digital processing that produces changes in density/brightness. | show 🗑
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| show | OD 0.25-2.50
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| What is the major consideration in assessing density verification? | show 🗑
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| The ____ image has received too many photons and has recorded too much information. | show 🗑
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| show | window level
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| show | overexposed
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| If exposure conditions push into the toe or shoulder regions of the curve, dramatic _____________ changes can be seen. | show 🗑
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| _______ is the controlling factor of density. | show 🗑
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| show | kVp
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| show | insufficient/excessive
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| show | density
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| _______ is the ability of the film to stop light. | show 🗑
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| show | 10% or 1/10
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| show | approximately proportional
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| Will doubling the exposure result in a doubling the film density? | show 🗑
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| show | window leveling
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| show | mAs
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| Digital image histograms are ____________ of the exposure to the IR. | show 🗑
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| As mAs increases, ________ increases proportionally and ________ also increases. | show 🗑
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| show | extremely short or long
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| show | film density
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| show | 30%
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| show | mAs
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| show | bright light/scanner
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| The general rule of thumb for mAs changes is to make adjustments in increments of ______ or ______. | show 🗑
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| Kilovoltage has a __________ effect on density. | show 🗑
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| show | energy
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| The 15% rule is used as a guide to maintain the same image receptor exposure film density when _______ changes. | show 🗑
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| The 15% rule will always change the ______ of the image. | show 🗑
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| A radiograph of the elbow is produced using 4 mAs at 60 kVp. What kVp would be required to halve the exposure to the IR. | show 🗑
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| show | 25
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| Motion has what impact on density? | show 🗑
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| show | 16:1 and 8:1; amount of lead strips in a grid
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| An increase in pt size will ______ density and a decrease in pt size will _____ density. | show 🗑
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| show | increase
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| An increase lead in the grid will ____ density. | show 🗑
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| An increase in screen speed will ____ density.(more efficient) | show 🗑
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| What kind of relationship is distance to density? | show 🗑
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| show | inverse relationship
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| Increased generator will result in an ______ density. (high field, more efficient) | show 🗑
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| A radiograph of the chest with pneumothorax will result in a a radiograph with more ______. | show 🗑
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| show | Less
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| The two photographic factors that allow detail to be seen are ______ and ______. | show 🗑
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| As developer solution temperature increases, film density will _______. | show 🗑
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| If a satisfactory exposure is obtained with 20 mAs at 72", what mAs will be required to maintain the same exposure at 40"? | show 🗑
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| show | 2.5 mAs
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| A radiograph of the elbow is produced using a 4 mAs at 60 kVp. What kVp would be required to halve the exposure to the IR? | show 🗑
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| show | generator efficiency
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| Thicker anatomical parts should be placed on the _____ side and smaller anatomical parts should be placed on the _____ side. | show 🗑
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| show | negatively
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| If a radiograph using 40 mAs (400mA at 0.10 sec.) produced a radiograph with satisfactory density, what new time should be used at 200 mA? | show 🗑
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| show | 63 kVp (55 kVp + 8.25 kVp =63 kVp (63.25 kVp.)
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| show | mAs2=60
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| show | mAs2=12
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| What is the proper mAs for use with an 80 RS system when technical factors of 55 kVp and 5 mAs produce an acceptable image with a 200 RS system? | show 🗑
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| An increase in patient size will ___________ density. A decrease in patient size will _______ density. | show 🗑
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| show | decrease
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