Operation of computed tomography | Wikipedia audio article
Channel: Subhajit Sahu
Date: 13/01/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Operation_of_computed_tomography


00:00:52 1 Structure
00:02:12 2 Contrast media
00:02:53 3 Schematic configuration and motion
00:03:35 3.1 Statements
00:03:51 3.2 Motion of parallel beam irradiation optical system
00:04:03 3.3 Increment/Table speed
00:04:15 3.4 Obtaining transmission image ‘s’
00:05:40 4 Tomographic reconstruction
00:07:24 4.1 Basic principle
00:08:01 4.1.1 (1)The Results of measurement p(s,θ) of parallel beam irradiation optical system
00:09:30 4.1.2 (2)μ(x, y) is restored by performing inverse radon transform to measurement results
00:11:15 5 Spiral CT
00:13:10 5.1 Single-slice and multi-slice Spiral CT
00:20:44 5.2 Pitch
00:21:26 5.3 Helical (or spiral) cone beam computed tomography
00:22:26 6 History
00:23:22 7 References
00:23:57 8 Notes
00:25:15 9 External links



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SUMMARY
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X-ray computed tomography operates by using an X-ray generator that rotates around the object; X-ray detectors are positioned on the opposite side of the circle from the X-ray source.

A visual representation of the raw data obtained is called a sinogram, yet it is not sufficient for interpretation. Once the scan data has been acquired, the data must be processed using a form of tomographic reconstruction, which produces a series of cross-sectional images. In terms of mathematics, the raw data acquired by the scanner consists of multiple "projections" of the object being scanned. These projections are effectively the Radon transformation of the structure of the object. Reconstruction, essentially involves solving the inverse Radon transformation.