Term
| What happens to the strength of the x-ray beam if the SID is doubled? |
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Definition
| The strenght of the x-ray beam is 0.25 |
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Term
| What prime factor of exposure controls the rate of x-ray production, rate of flow of electrons across the tube? |
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Definition
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Term
| What prime factor of exposure controls the wavelenght of the x-ray beam |
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Definition
| The shorter the wavelenght the stronger the intensity. The longer the wavelenght the less intensity/energy. |
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Term
| What unit of exposure controls radiographic density? |
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Definition
| mAs- milliamsperes x exposure time/second |
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Term
| Describe radiographic contrast. |
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Definition
| Difference in the density between adjecment perfion the image |
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Term
| Which prime factor of exposure control contrast? |
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Definition
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Term
| What are the four quality control factors? |
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Definition
1. Density
2. Distortion
3. Contrast
4.Recorded Detail |
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Term
| Which prime factor exposure indicates the total guantity of x-rays in an exposure? |
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Definition
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Term
| What is the principal method of dealing with scatter radiation? |
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Definition
| Limit Field sign and Reduce the kVp |
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Term
| A radiograph is produced using a typocal technique of 10 mAs and 65 kVp. The density is acceotable but more contrast is desired. |
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Definition
65 kVp x 0.85 = 55.25( round down to 55 kVp)
Multiply the mAs by 2(20mAs x 2=10mAs)
My new exposure is 20 mAs at 55 kVp |
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Term
| A radiography is produced using a typical technique of 29 mAs ans 68 kVp. The density is acceptable but the less contrast is desired. |
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Definition
68 kVp x 1.15= 78.2 kVp( round down to 78 kVp)
Divide the mAs by 2( 20mAs/2=10 mAs)
My new exposure is 10 mAk at 78 kVp |
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Term
| The increase contrast, decrease the Kvp by 15% and multiply the mAs by2. What numbers are you going to multiply by? |
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Definition
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Term
| To decrease contrast, increase the kVp by 15% and divide the mAs by 2. /what number are you going to multiply by? |
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Definition
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Term
| If the changes in the film is too dark. Then the solution us to _______ the mAs? |
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Definition
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Term
| Kilovoltage is used to _____ |
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Definition
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Term
| kVp is not used to change ______? |
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Definition
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Term
| Density changes when a film is to light, the best solution is usually to increase the ____? |
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Definition
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Term
| Satisfactory cervical sprine film measuring 14 cm( thickness), uses 100 mAs at 0.15, 80 kVp at 72 S.I.D. What should the kVp be if the convical spine measures 12 cm? |
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Definition
2kVp x 2cm=4kVp
80 kVp-4kVp= 76 kVp |
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Term
| The allowance change in kVp if technique is below 85 kVp is? |
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Definition
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Term
| The sllowance change in kVp if technique is able 85 kVp is? |
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Definition
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Term
| large changes in the kVp will alter the ______ and affect the radiograohuc quality. |
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Definition
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Term
| When measuring part, changes can be made of what increments. |
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Definition
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Term
| What is the formula for a part decrease for mAs? |
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Definition
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Term
| What is the formula for a past increase for mAs? |
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Definition
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Term
| If the part size decreases 2cm, the mAs will decrease by _____? |
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Definition
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Term
| If the parts size increase 2cm the mAs will increase by ______% |
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Definition
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Term
| As the part size decrease density will ______? |
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Definition
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Term
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Definition
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Term
| Too low kVp range will produce _____ contrast for small measurements |
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Definition
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Term
| What is the amount of radiation that is necessary to redden the skin |
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Definition
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Term
| The data needed to calculate exposure includes the mAs, kVp and SSD.What does SSD stand for? |
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Definition
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Term
| The SI unit used to measure does equivalent is the Sievent (SV) 1 SV=? |
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Definition
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Term
| A worker exposed to one rad of fast neutrons, would received how many Rem of occupational dose? |
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Definition
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Term
| How many Rem would an exposure of 10 rad of fast neutrons equal? |
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Definition
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Term
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Definition
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Term
| One Rad of fast neutrons has the biological effect equal to how many of x-ray energy |
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Definition
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Term
| Sievent is the corresponding SI unit of? |
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Definition
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Term
| Rem is the conventional unit of? |
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Definition
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Term
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Definition
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Term
| SI measurement is call Gray (GY) and is equal to how many Rad? |
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Definition
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Term
| One Roentgen of exposure will result in approximately how much of Rad? |
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Definition
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Term
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Definition
|
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Term
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Definition
| Specific tissue dose and therapeufic radiation dose |
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Term
| Roentgen is the measurement of radiation intensity in the air called? |
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Definition
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Term
| What do you call the high kVp setting that will produce sufficient contrast for occuptable film quality |
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Definition
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Term
| What adjustment are made for soft tissues? |
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Definition
| Decrease the kVp by 15% without charging the mAs |
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Term
| What four factors directly control intensity? |
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Definition
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Term
| In radiation, what are the systems of measure? |
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Definition
1. Si system on Internation system
2. English or Conventinal system |
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Term
| Which body habitus requires the highest exposure setting |
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Definition
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Term
| Which body habitus requires the lowest exposure setting |
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Definition
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Term
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Definition
| A variation in intensity of x-ray radiation from the cathode to the anode |
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Term
| During heel effect the intensity across the beam can vary as much as? |
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Definition
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Term
| The heel effect is caused by: |
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Definition
| An increased absorption of the primary bea, by the heel of the anode/target |
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Term
| The smaller the focal spot and the longer the field size? |
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Definition
| The greater the heel effect |
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Term
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Definition
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Term
| What is the best way to decrease exposure |
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Definition
| Increase kVp and increase speed |
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