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a mathematical method for determining the value of an unknown quantity that has a specific relationship to one or more quantity
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a fraction with a denominator of 10, 100 or any number that consists of 1followed by one or more zeros
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Chapter 3 vocabualry
Chapter3 Keywords
| Question | Answer |
|---|---|
| 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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