NOMOGRAM PRACTICE

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NOMOGRAM PRACTICE
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Problem What is the mr/mas on an abdominal
radiograph using 3.0 mm of filtration and 80 kVp?
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Problem What is the mr/mas on an abdominal
radiograph using 3.0 mm of filtration and 80 kVp?
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Solution Draw a line (green box) from the x
axis at 3.0 mm. filtration to the 80 kVp
curvilinear line
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Solution cont. Draw a line from the point on the
80 kVp curvilinear line to the y- axis (pink
line). This will give the mr/mas which in this
case would be 5 mR
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Problem What is the mr/mas on an abdominal
radiograph using 3.0 mm of filtration and 80
kVp?Answer 5mR per mAs
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Problem What is the ESE on an abdominal
radiograph made at 400 mA at . 08 sec using 3.0
mm of filtration and 80 kVp?Solution Same steps
as before. Calculate the mAs of this radiograph
(400 mA x .08 sec 32 mAs) 5mR per mAs. 32
mAs x 5 mR 160 mR ESE