Term
| Density will _____ if collimation DECREASES. |
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Definition
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Term
| Density will _____ if grid is changed from 12:1 to 6:1 |
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Definition
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Term
| Density will _____ if focal spot size is increased. |
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Definition
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Term
| Density will _____ if MA is increased. |
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Definition
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Term
| Density will _____ if KVP is increased. |
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Definition
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Term
| Density will _____ if developer temp is increased. |
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Definition
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Term
| Density will _____ if screen speed is increased. |
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Definition
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Term
| Density will _____ if time of development is decreased. |
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Definition
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Term
| Density will _____ if SID is increased. |
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Definition
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Term
| Contrast will ____ if focal spot size is increased. |
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Definition
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Term
| Contrast will ____ if grid ratio goes from 12:1 to 5:1. |
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Definition
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Term
| Contrast will ____ if collimation goes from 8x10 to 14x17. |
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Definition
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Term
| Contrast will ____ if kVp is decreased. |
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Definition
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Term
| Contrast will ____ if OID is increased. |
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Definition
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Term
| Short or Long Scale of Contrast? High Contrast... |
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Definition
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Term
| Short or Long Scale Contrast? Few gray tones... |
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Definition
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Term
| Short or Long Scale Contrast? Best for imaging chest... |
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Definition
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Term
| Short or Long Scale Contrast? Low kV... |
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Definition
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Term
| Short or Long Scale of Contrast? Low contrast... |
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Definition
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Term
| Would a higher kVp/lower kVp produce an image with the lowest contrast? |
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Definition
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Term
| What is the controling factor for density? |
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Definition
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Term
| What is the controling factor for contrast? |
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Definition
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Term
| Decrease in fog will tend to do what to detail and density? |
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Definition
| Increase detail & decrease density. |
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Term
| What 3 factors could produce fog in a film? |
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Definition
| Scatter radiation, film age, processing chemistry. |
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Term
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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
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Term
| Difference in adjacent densities |
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Definition
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Term
| An image described as having to much radiographic density is what, regarding exposure? |
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Definition
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Term
| Radiographic contrast is defined as.... |
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Definition
| Degree of overall blackness |
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Term
| Which of the following will NOT contribute to overexposure of a radiograph? focal spot size to large, SID too low, MA set too high, kVp set too high, none of the above? |
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Definition
| Focal spot size too large. |
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Term
| What factor has the greatest effect on radiographic density? |
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Definition
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Term
| If mA is increased by 2 times, how must time be changed in order to maintain image density? |
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Definition
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Term
| When assessing the image density of a CR image, one must consider.... |
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Definition
| degree of overall image blackness & Exposure Index # |
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Term
| Changing ____ will change both image density and contrast. |
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Definition
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Term
| What is the best method to reduce scatter radiation and unwanted density on the image? |
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Definition
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Term
| The exposure time iis halved, how must the MA be adjusted to maintain the same density? |
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Definition
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Term
| Which of the following may cause a dark radiograph? grid cut-off, SID too low, grid ration too high, main drive in processor slows.... |
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Definition
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Term
| Would a higher/lower screen speed produce an image with more density? |
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Definition
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Term
| What controls the quality of the xray beam? |
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Definition
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Term
| What controls the quantity of xrays produced? |
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Definition
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Term
| How will high kVp techniques affect radiographic contrast? |
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Definition
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Term
| Relationship of kVp to contrast... |
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Definition
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Term
| As contrast rises, how is the number of densities in the film affected? |
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Definition
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Term
| How would an image with just a few, wide density differences be described? |
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Definition
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Term
| What describes a short scale of contrast? |
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Definition
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Term
| Low contrast has many/few shades of densities? |
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Definition
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Term
| TRUE/FALSE:high contrast has alot of densities. |
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Definition
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Term
| TRUE/FALSE:A long scale is high contrast. |
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Definition
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Term
| TRUE/FALSE:A long scale has few shades of densities. |
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Definition
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Term
| Which of the following has the greatest effect on radiographic contrast...tube filtration/close collimation/focal spot size/eliminating scattered radiation. |
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Definition
| eliminating scattered radiation |
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Term
| How will air gap technique affect contrast? |
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Definition
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Term
| Detail will _____ if focal spot size is decreased. |
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Definition
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Term
| Detail will _____ if OID is decreased. |
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Definition
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Term
| Detail will _____ if SID is decreased. |
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Definition
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Term
| Detail will _____ if screen speed goes from RS400 to RS50. |
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Definition
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Term
| Detail will _____ IF EXPOSURE TIME GOES FROM 1-20 SEC TO 1/40 SEC. |
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Definition
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Term
| Distortion will _____ if OID is increased. |
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Definition
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Term
| Distortion will _____ if SID is decreased. |
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Definition
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Term
| Distortion will _____ if tube is angled. |
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Definition
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Term
| Distortion will _____ if collimation goes from 10x12 to 14x14. |
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Definition
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Term
| Distortion will _____ if kV increases. |
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Definition
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Term
| Distortion will _____ if mA is decreased. |
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Definition
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Term
| Elongation and foreshortening are terms used to describe ______. |
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Definition
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Term
| An increase in focal spot size will cause ______ in magnification. |
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Definition
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Term
| An increase in focal spot size will _____ penumbra. |
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Definition
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Term
| An increase in OID will _____ penumbra. |
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Definition
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Term
| If the OID is increased magnification will _______. |
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Definition
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|
Term
| Increase in SID will _______ magnification. |
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Definition
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Term
| Increase in penumbra will ______ detail in the image. |
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Definition
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Term
| Compton,Pair Production,Classic Scatter: Which occurs in the diagnostic range? |
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Definition
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Term
| Which waveform has the longest wavelength? xrays, ultaviolet light, microwaves, visible light, none... |
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Definition
| Microwaves (long wavelength=low freq.) |
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Term
| The decrease in intensity of radiation due to absorbtion and scatter defines.... |
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Definition
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Term
| Which of the following has no charge and no mass? alpha, beta, gamma... |
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Definition
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Term
| An alpha particle has a charge of.... |
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Definition
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Term
| Which of the following would be most penetrating? Gamma, beta, alpha, all the same, alpha & beta.... |
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Definition
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Term
| Which would be most ionizing along its track of penetration and creates greater biological danger? Gamma, beta, alpha. |
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Definition
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Term
| 2 Protons, 2 neutrons describes... |
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Definition
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Term
| Electromagnetic radiation emitted from the nucleus would best describe... |
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Definition
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Term
| An electron-like particle would best describe... |
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Definition
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Term
| _____ has a charge of -1. |
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Definition
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Term
| ______ is a bundle of energy with no mass and no charge. Alpha,beta,xray,Gamma Ray. |
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Definition
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Term
| What particle would not penetrate a sheet of paper? |
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Definition
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Term
| If the frequency of an electromagnetic energy increases the energy will... |
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Definition
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Term
| If the wavelength of an electromagnetic energy increases the energy will.... |
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Definition
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Term
| In the electromagnetic spectrum, when moving from bottom to top (microwave to x and Gamma) the wavelength is... |
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Definition
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Term
| In the electromagnetic spectrum, when moving from bottom to top the frequency is.... |
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Definition
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Term
| Whats not a form of electromagnetic energy? |
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Definition
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Term
| The difference between x-rays and Gamma rays is... |
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Definition
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Term
| In order for a photon to exist, it must be...(electromagnetic radiation,particlulate radiation,in motion) |
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Definition
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Term
| The movement of electromagnetic radiation may be described as... |
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Definition
| Sine wave form, sinusoidal |
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Term
| Electromagnetic radiation moves at what speed? |
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Definition
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|
Term
| Alpha & Beta are classified as what type of energy? |
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Definition
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|
Term
| What determnes the wavelength of an x-ray photon? |
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Definition
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|
Term
| X-rays or Beta particles originate from the nucleus of an atom? |
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Definition
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Term
| Beta particles or Gamma rays are forms of ionizign radiation. |
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Definition
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|
Term
| 2 protons/2 neutrons best describes a alpha particle or beta particle? |
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Definition
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|
Term
| Xrays show properties of particles & waves, called _____ properties. |
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Definition
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|
Term
| A material that is easily penetrated is said to be.... |
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Definition
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|
Term
| The Inverse Square Law says a small change in distance from a source will result in a _____ change in dose. |
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Definition
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|
Term
| TRUE/FALSE: C;assical scattering reduces image contrast when imaging extremities. |
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Definition
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|
Term
| TRUE/FALSE:Pair Production and photoelectric effect always occurtogether. |
|
Definition
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|
Term
| X-Ray photons are positively charged. |
|
Definition
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|
Term
| TRUE/FALSE: Xray photons are high speed electrons. |
|
Definition
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|
Term
| TRUE/FALSE:A recoil electron is associated with photoelectric effect. |
|
Definition
|
|
Term
| TRUE/FALSE:Aloha and Beta radiation exibit long wavelengths and high frequency. |
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Definition
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|
Term
| TRUE/FALSE:All electromagnetic radiation can ionize matter. |
|
Definition
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|
Term
| TRUE/FALSE:All electromagnetic radiation travels at the speed of light. |
|
Definition
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|
Term
| TRUE/FALSE:The most biologically harmful radiation is Gamma Radiation |
|
Definition
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|
Term
| TRUE/FALSE:A lower mA setting will compensate for involuntary motion. |
|
Definition
|
|
Term
| TRUE/FALSE:An increase in mA changes the wavelenth of the xray photon. |
|
Definition
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