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Image chapter 7 & HW

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
        Help!  

Question
Answer
show OID  
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show subject anatomy is inclined  
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Distortion can be corrected by   show
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show Reduce OID  
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Distortion of an x-ray image results from unequal   show
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In magnification radiography, when the subject is placed equidistant between the source and the image receptor, the size of the image will be   show
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show subject contrast will remain unchanged and the magnification factor will remain unchanged  
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To obtain minimum magnification, one should do what   show
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What condition contributes the least to image distrotion   show
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show Position the object as close to the image receptor as is practical  
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show results from an inclined object  
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show Shorter OID  
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What is not one of the factors of the geometric factors that affect radiographic quality   show
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The magnification factor is not dependent on   show
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The magnification factor increases with increasing what   show
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show Postioning the anode the same side as the chest wall  
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What is most responsible for radiographic spatial resolution   show
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The sharpness of detail in a radiograph is best increased by the use of what   show
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show Sharp in detail  
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show minimize the FSB of the kidneys  
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Geometric blur is controlled prinicipally by what image system characteristic   show
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show Small focal spot  
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Another term for FSB is   show
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When one images an object lateral to the central axis of the x-ray beam the FSB will be   show
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Increasing what is effective in reducing FSB   show
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When the focal spot is switched from larger to small   show
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show Reducing OID  
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show Subject contrat  
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Spatial resolutiuon is principally affected by waht   show
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show Increase SID  
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show Increasing SID and reducing OID  
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Focal spot blur can be reduced by what   show
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show Average energy of the x-ray beam  
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Ensuring good screen film contact also encures reduced   show
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show contrast resolution  
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show contrast resolution and patient dose  
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What is most often influenced by focal spot size   show
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show 70kVp/200mAs  
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show kVp  
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show Better spatial resolution  
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If the other factors remain constant what would have the highest optical density   show
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An anteroposterior examination of the abdomen is taken at 80kVp, 50mAs, and 100cm SID. If the scale of contrast is to be shortened the radiologic technologist must do what   show
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show 80ms  
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When radiographic technique factors are adjusted to obtain an acceptable image, patient dose will increase as what increases   show
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show reducing focal spot size  
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show Slow radiographic intensifying screens( compared with fast screens  
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With other factors staying the same optical density will increase with increasing   show
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Radiograhic contrast is increased by what   show
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show Motion blur is reduced if the same mA is used  
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The sharpness of structural lines or minute details on the radiograph is   show
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show Visibilty of Detail  
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These are the factors that can be measureed   show
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What are the 4 factors of the x-ray beam   show
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show visibilty of detail and geometric detail  
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show reduce it  
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increasing the screen speed will have what effect on detail   show
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decreasing collimation will have what effect on detail   show
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Increasing the motion has what effect on detail   show
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What are the 4 ways to reduce motion   show
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show communication  
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What are the two properties of geomteric detail   show
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image proper or true image is   show
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the light hazy area surrounding the true image   show
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show SID, OID and FSS  
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show Long SID, Sort OID, and Small FSS  
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increasing the SID ____ penumbra and _____ detail   show
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Increasing the OID____ penumbra and _____ detail   show
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Increasing the FSS ___ penumbra and _____ detail   show
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When do we use a long SID and why   show
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show increase the SID to compensate for the increase in OID  
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show Extremity work  
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What whappens to the focal spot as mA is increased   show
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show >0.3mm  
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What do we use to measure a focal spot size of a Star Pattern   show
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show line focus principle  
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show it gives us the heat capacity of a large focal spot and the geometric sharpness of a small focal spot  
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show effective focal spot  
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the area bombarded by the electrons(at anode;target;in the tube)   show
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Which focal spot is the largest   show
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show 5 to 15 degrees  
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show smaller  
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The best radiograph having the most detail will have   show
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show line pair test  
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What does SOD mean   show
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show width of the focus x OID/ SOD  
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show the smaller number  
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misrepresentation of the true size and or shape of the object   show
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show size and shape  
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what is the true distortion   show
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show shape  
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misrepresentation of the true size of an object   show
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The width of the image is to the width of the object as the distance of the image from the light source is to the distance of the object from the light source   show
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The longer the SID the____ the magnification; the shorter the OID the____ the magnifiaction   show
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What is the formula for law of magnification   show
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If you increase the OID for certian reasons what should you do to SID and why   show
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The misrepresentation of the shape of an object   show
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what is shape distortion caused by   show
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show poorer  
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What is the Ideal object film and tube postion   show
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The image is shorter than the object   show
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the image is longer than the object   show
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what is foreshortening caused by   show
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show the tube being angled  
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