Tomography is a form of imaging an object in three dimensions and can be used for anatomy.
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Sample flash cards in this set:
|Tomography Notes||Tomography Notes|
|Tomography is done by...||Allowing the film & tube to move along the Fulcrum during an exposure.|
|Tomography purpose is...||A special type of imaging used to obtain an image of a specific layer of tissue.|
|Other terms that describe Tomography are...||1. Planography 2. Laminography 3. Straightography 4. Body Section Radiography.|
|A Tomogram is...||A radiograph which is produced by a Tomo unit.|
|A Fulcrum is...||The pivot point of the connecting rod between the X-ray tube & film.|
|The Fulcrum Level is...||The distance measured in CM or Inches from the top of the table to the Fulcrum.|
|An Object Plane or (Focal Plane) is...||The plane in which the object is clear & in focus.|
|The Sectional Thickness is...||The thickness of an object or Focal Plane.|
|An Exposure Angle is...||The angle resulting from X-ray beam improvement.|
|Tube movement is...||The distance the tube travels.|
|Amplitude is...||The speed of the tube movement.|
|Tube Trajectory is...||The blurring pattern of the tube movement.|
|Blur is...||The area of distortion of objects outside the object plane.|
|Blur Margin is...||The outer edge of the blurred object.|
|Different Tube Trajectories are...||1. Linear - The least complex 2. Elliptical 3. Circular 4. Spiral - Complex 5. Hypocycloidal - Most Complex|
|Fulcrum Types are...||1. Fixed - Are most often used with multi-directional Tomo units. 2. Variable - The Fulcrum level can be moved in relation to the patient.|
|2 ways to determine the Fulcrum level are...||1. Take 2 X-rays 90 degrees apart. 2. Measure the desired part & divide by 3. (Calipers for IVP's)|
|Influencing factors that control Blur are...||1. Distance the object is from the object plane. 2. Exposure angles. (more angle = more Blur) 3. Distance the object is from the IR 4. Tube Trajectory|