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Physics 2-Tomography

What are 3 ways to separate superimposed images, and list ex of each? 1. Distortion, Obl Spine 2. Decreased SID, Sternum 3. Motion of the Part, chewing view odontoid process
- the radiographic demonstration of one chosen layer of an object by intentionally blurring the images above and below the pt of interest. tomography ( goes with drawing in essay)
- the procedure tomography
- the device or equipment tomograph
- set of films obtained from a tomographic study tomograms
What is the basic principle of tomography? Motion
- a slab btwn two planes of maximum permissible unsharpness tomographic section
What are the two factors affecting the thickness of a tomographic section? tomographic angle, SID
The larger the angle, the _______ the section. thinner
The ______ the angle, the thinner the section. Larger
- the actual distance the tube travels during the exposure amplitude
The shorter the amplitude the _____ the section. thicker
Section thickness ______ ( becomes ____ ) as the SID decreases. decreases ( thinner)
The more uniform the blurring, the _____ the quality of the tomogram better
- the blurred images of points outside the tomographic section redundant shadows
What two factors does the quality of tomographic images depend on? 1. sharpness and contrast of the image of the section 2. uniform blurring of the redundant shawdows
Maximum blurring occurs when the tube movement is ________ to the predominant lines of the structure being tomogramed. perpendicular
What is the simplest and most commonly used tomographic motion? rectilinear
Which linkage problem causes the least amt of impairment? Most? X-ray Tube / fulcrum
Which will produce a higher pt dose, tomography or conventional? tomography
What will happen if the section thickness are set too small? over expose the pt from having to take many cuts
What will happen if the section thickness are set too large? might miss the pathology
Created by: erikasmith28