Computed tomography physics

What is CAT scanner in physics?
Computerized axial tomography (CAT) scan machines produce X-rays, a powerful form of electromagnetic energy.
X-ray photons are basically the same thing as visible light photons, but they have much more energy..
What is the basic principle of tomography?
CT uses ionizing radiation, or x-rays, coupled with an electronic detector array to record a pattern of densities and create an image of a “slice” or “cut” of tissue.
The x-ray beam rotates around the object within the scanner such that multiple x-ray projections pass through the object (Fig 1).
Fig..
What is the physics of computed tomography?
To acquire a CT image, an object is placed on a table.
An X-ray source (within the gantry of a CT scanner) rotates around the object, and X-rays which pass through the object are detected on the opposite side.
The detections acquired at different angles are sent to the data acquisition system (DAS)..
Radiology departments are major energy consumers within a hospital through operation of CT and MRI scanners, which require energy in the range of 0.5–30 kWh per examination, with peak consumption reaching beyond 100 kW for a short time period.

As the x-rays leave the patient, they are picked up by the detectors and transmitted to a computer. Each time the x-ray source completes one full rotation, the CT computer uses sophisticated mathematical techniques to construct a two-dimensional image slice of the patient.

Computed tomography (CT) was the first non-invasive radiological method allowing the generation of tomographic images of every part of the human body IntroductionPresent Status of CT Spiral CTElectron Beam Techniques

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Computed tomography physics

What is CAT scanner in physics?

What is the basic principle of tomography?

What is the physics of computed tomography?