Computed Tomography Technologist Practice Exam

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What does absorption efficiency measure in CT imaging?

The speed of image processing

The number of protons absorbed by the detector

Absorption efficiency in CT imaging specifically quantifies how effectively the detector converts incoming X-ray photons into measurable signals. This is directly related to the number of protons, or more accurately, the X-ray photons that are absorbed by the detector material during an imaging session. Higher absorption efficiency indicates that a greater portion of the incident radiation is being captured, leading to improved image quality and sensitivity in detecting variations in tissue density.

While other aspects of CT imaging such as image processing speed, quality of the imaging technique, and total radiation used are important, they do not specifically pertain to the concept of absorption efficiency. The focus on protons, or more fittingly, X-ray photons, lends to the central role that absorption efficiency plays in enhancing the performance and fidelity of CT images.

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The quality of the imaging technique

The total amount of radiation used

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