CT scanner with cover removed to show internal components. Legend: T: X-ray tube D: X-ray detectors X: X-ray beam R: Gantry rotation
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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 sinogram (left) and an image sample (right).[1]Picture of a CT scout (scanogram or topogram) as used for planning every scan slice.
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.
^Jun, Kyungtaek; Yoon, Seokhwan (2017). "Alignment Solution for CT Image Reconstruction using Fixed Point and Virtual Rotation Axis". Scientific Reports. 7: 41218. arXiv:1605.04833. Bibcode:2017NatSR...741218J. doi:10.1038/srep41218. ISSN 2045-2322. PMC 5264594. PMID 28120881.
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X-ray computedtomography operates by using an X-ray generator that rotates around the object; X-ray detectors are positioned on the opposite side of the...
The history of X-ray computedtomography dates back to at least 1917 with the mathematical theory of the Radon transform In the early 1900s an Italian...
A computedtomography scan (CT scan; formerly called computed axial tomography scan or CAT scan) is a medical imaging technique used to obtain detailed...
transform, a type of integral transform in mathematics A visual representation of the raw data obtained in the operationofcomputedtomography Sonogram (disambiguation)...
Cone beam computedtomography (or CBCT, also referred to as C-arm CT, cone beam volume CT, flat panel CT or Digital Volume Tomography (DVT)) is a medical...
to form a three-dimensional image. PET scanners can incorporate a computedtomography scanner (CT) and are known as PET-CT scanners. PET scan images can...
Radon. A notable example of applications is the reconstruction ofcomputedtomography (CT) where cross-sectional images of patients are obtained in non-invasive...
emission computedtomography (SPECT).[citation needed] Various radiopharmaceuticals targeted at specific organs are also available, some of the most common...
CT pneumocolon) is the use of CT scanning or magnetic resonance imaging (MRI) to produce two- and three-dimensional images of the colon (large intestine)...
Quantum tomography or quantum state tomography is the process by which a quantum state is reconstructed using measurements on an ensemble of identical...
optical density. Modern computedtomography (CT) scanners have AEC systems which aim to maintain image quality for patients of varying sizes, whilst keeping...
process of calculating from a set of observations the causal factors that produced them: for example, calculating an image in X-ray computedtomography, source...
before operation. Although computedtomography angiography (CTA) and Magnetic resonance angiography (MRA) has been used widely in evaluation of intracranial...
share image data,. DICONDE can be used for computed radiography, digital radiography, computedtomography, ultrasonic testing, and Eddy-current testing...
mass-to-charge ratio computed. Through successive evaporation of material, layers of atoms are removed from a specimen, allowing for probing not only of the surface...
computed given its input. The model describes how units of computations, memories, and communications are organized. The computational complexity of an...
detector). The generation of flat two-dimensional images by this technique is called projectional radiography. In computedtomography (CT scanning), an X-ray...
as others that do, such as computedtomography (CT), fluoroscopy, and nuclear medicine including positron emission tomography (PET). Interventional radiology...
especially when applied to developing foetuses in the womb CT scan (computedtomography scan) Magnetic resonance imaging, MRI scan Switch access scanning...
computedtomography 4,984,257 Automatic dynamic focusing for computedtomography 4,989,225 CAT scanner with simultaneous translation and rotation of objects...
computedtomography, "windowing" refers to a related concept for determining how to display the intensity of measured radiation. A classic example of...
and sold medical imaging solutions, including: Nuclear medicine, computedtomography magnetic resonance imaging and X-ray scanners. Elscint's shares traded...
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