MEDRADSC 3G03 Lecture Notes - Lecture 19: Digital Radiography, Systematic Chaos, Radiography
19 Dec 2017
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Document Summary
The conventional tomography section of the manual was omitted in error. The required readings are bushong chapter 13 pages 258 to 264. Conventional tomography: what it is, application, where is it heading, foundation for ct. Questio(cid:374)s . : what happens to an object when we angle the tube, elongating/foreshortening, what happens when we have motion during an exposure, blurring. History today : before evolution of computed tomography (ct), conventional tomography was the gold standard for achieving 2d sectional images of a body part. Linear tomography continues to be used today, mainly for kidneys, tmjs and etc also very prevalent in rural healthcare settings: northern communities. Slice thickness: variation of fulcrum (changing where our x-ray tube is pivoting) Increased spatial resolution, inherently has good contrast resolution: zonography: narrow angle tomography (less than 10 exposure amplitude), thicker slices, for things where less detail required, (cid:862)a(cid:374)(cid:455) sli(cid:272)e that is 6 (cid:373)(cid:373) or larger(cid:863)
