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CT Scanning Principle and Components

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Questions and Answers

What is the purpose of the gantry in a CT scanner?

It processes the images obtained from the scanning.

It generates the X-ray beam and houses electronic controls. (correct)

It stores the projection data collected during scans.

It supports the patient during the scanning process.

What type of beam does the X-ray tube in a CT scanner produce?

A linear beam focused on a specific point.

A fan beam approximating the width of the body. (correct)

A wide beam that spreads out into a cone shape.

A circular beam that covers the entire body.

Which component is essential for measuring the transmitted radiation during a CT scan?

Gantry

Radiation detector (correct)

Image processing computer

Power generator

How is tissue attenuation measured in a CT scan?

<p>From multiple X-ray tube positions across a large region.</p> Signup and view all the answers

What role does the computer workstation play in a CT scanner system?

<p>It processes and reconstructs data from scans.</p> Signup and view all the answers

Study Notes

CT Scanning Principle

CT (Computed Tomography) reconstructs internal object structure from multiple projections.
X-ray beams scan thin body cross-sections.
Transmitted radiation is measured by a detector.
CT is a systematic collection and display of projection data.

CT Scanner Components

Computer workstation for operation.
Image processing computers.
Electronic cabinets.
Gantry (housing key components).
Patient imaging table.

Gantry Details

Houses the X-ray source, detectors, and rotating mechanisms.
X-ray beam production, detection, and acquisition are within the gantry's rotating part.
Fan-beam X-ray tube and detector array are positioned opposite each other within the gantry.
Three-phase power generator is also housed within the gantry.

X-ray Tube and Beam

X-ray tube produces a fan beam, roughly as wide as the body.
Measures tissue attenuation across a wide area from one tube position.
Detector array on the opposite side measures X-ray beam strength laterally across the body.

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Description

Explore the fundamental principles of Computed Tomography (CT) and its essential components. This quiz covers the process of imaging, the function of the gantry, and the role of the X-ray tube. Test your knowledge about how CT scans are performed and the technology behind them.