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Chapter 3 vocabualry

Chapter3 Keywords

QuestionAnswer
a mathematical method for determining the value of an unknown quantity that has a specific relationship to one or more quantity Algebra
a fraction with a denominator of 10, 100 or any number that consists of 1followed by one or more zeros Decimal
the lower number of a fraction Denominator
the dot at the left of a decimal fraction; indicates the number of parts Decimal point
answer to subtraction problem Difference
the number divided into in a division Dividend
the number that is divided into the dividend Divisor
a declaration that two mathematical statements (groups of numbers, together with their signs or mathematical functions) are equal to each other Equation
a number consisting of a whole number and a fraction Mixed number / Improper fraction
The upper number of a fraction Numerator
A form of a fraction with a denominator of 100 Percentage
the answer to a multiplication table Product
the answer to a division problem Quotient
the quotient that results from dividing one number into another Ratio
the description of a number that has been multiplied by it-self Squared
the total or the answer to an addition problem Sum
a number that represents a portion of a whole number Fraction
the distance in inches between the radiation source in the x-ray tube and the imaging plane SID (Source Image Distance)
tool used to measure the body part Caliper
The number of times a number is multiplied by itself, as indicated as exponent Power
the number that is multiplied times it to form a mathematical term with exponent Base number
the description of a number that has been multiplied by itself two times Cubed
a superscript number that indicates how many times a number is multiplied by itself Exponent
the number that is left over when one number is divided unequally into another Remainder
The portion of a number which, when multiplied by itself equals the original number Squared root
mA X Seconds = mAs mAs formula
radiation intensity is inversely proportional to the square of the distance I1 / I2 = SID2 squared / SID1 squared Inverse Square Law
to maintain a constant radiographic intensity (density), the mAs must be directly proportional to the square of the distance mAs1 / mAs2 = SID1 squared / SID2 squared mAs maintenance /mAs distance formula / the square formula
Below 85 kVp, an adjustment of 2 kVp/cm will compensate for small changes. Above 85 kVp, a change of 3 kVp/cm is necessary Alteration for patient/part size kV
For a 2 cm increase in patient size, increase the mAs by 30% (multiply by 1.3) per 2 cm. For a 2 cm decrease in patient/part size, decrease the mAs by 20% (multiply by 0.8) per 2 cm 30 % rule (Alteration for patient/part size mAs)
to increase contrast (more difference between shades) decrease the kVp by 15% and multiply the mAs by 2. To decrease contrast, increase latitude and lower patient dose, increase kVp by 15% and divide the mAs by 2 15% rule
mAs is inversly proportional to the speed of the screen mAs1 / mAs2 = RS2 / RS1 Relative speed formula
mAs is directly proportional to the grid mAs1 / mAs2 = GCF1 / GCF2 Grid conversion formula
Created by: mdtodd
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