This article describes the principles and evolution of multislice ct. Here is a description about image acquisition and the image formation processes. A basic description of the mechanism of ct computed tomography scans for medical use in remote sensing. The basic principles of computed tomography and magnetic resonance imaging.
After this, ct was immediately welcomed by the medical community and. Before continuing the explanation in this presentation briefly goes over some of the key ideas of how mri data is obtained there are a lot of mathematical equations and physics. What is positron emission tomography computed tomography pet ct scanning. The basic principles of computed tomography and magnetic. Physicist allan cormack first proposed a method to improve tomographic imaging in a. This method consists in shooting a metallic surface with a small shots flow. Manual on contrast media reports that studies show the amount of contrast. This presentation gives an information about basic principles of ct scanning covering the syllabus of non destructive testing slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Ct computed tomography scans a level physics youtube.
Basic principles of ct ct imaging system moves around the body part at a fixed location attenuation information obtained in multiple planes. This video presentation explains the basic principle of ct scan. Ct scans are created using a series of xrays, which are a form of radiation on the electromagnetic spectrum. Computed tomography ct scanning, also known as, especially in the older literature and textbooks, computerized axial tomography cat scanning, is a diagnostic imaging procedure that uses xrays to build crosssectional images slices of the body. Pdf ct scanning techniques and applications researchgate. Since computed tomography ct has entered the industrial environment around thirty year ago, an.
The z axis determines the thickness of the crosssectional slice. A method for simultaneous image reconstruction and beam hardening correction pdf. Basic principles of ct each ct slice represents a specific plane in the patients body, referred to as the z axis. Computed tomography ct and magnetic resonance imaging mri are the most widely. Pdf since its introduction in 1972, xray computed tomography ct has evolved. Ct was introduced into clinical practice into 1971 with a scan of a cystic frontal lobe tumor on a patient at atkinson morley hospital in wimbledon united kingdom. Surface data are generated in the stl format, characterized by a polygonal.
Computertomografie meestal afgekort tot ct van computed tomography, ook wel tot cat van. Positron emission tomography computed tomography petct. A ct scan, or computed tomography scan is a medical imaging procedure that uses. Computed tomography, more commonly known as a ct or cat scan, is a. Positron emission tomography, also called pet imaging or a pet scan, is a type of nuclear medicine imaging. Spreiding van ctscanners bij ziekenhuizen in vlaanderen 2016. The scanner emits xrays towards the patient from a variety of angles and the detectors in the scanner measure the difference between the xrays that are absorbed by the body, and xrays that are transmitted through the body. Nuclear medicine imaging uses small amounts of radioactive material to diagnose, evaluate or treat a variety of diseases. What links here related changes upload file special pages permanent link page. This method has many advantages including the ability to rotate the 3d image in space or to view slices in succession, making it easier to find the exact place.
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