Computed Tomography Technologist Practice Exam 2025 – All-in-One Guide for Exam Success!

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What role does a higher kV setting play in beam intensity during a CT scan?

It reduces the beam intensity

It has no effect on beam intensity

It increases beam intensity and penetrability

A higher kV setting during a CT scan increases the beam intensity and penetrability. This occurs because kV (kilovolt) is a measure of the electrical potential that drives the electrons in the x-ray tube. When the kV is increased, the energy of the x-ray photons generated also increases, leading to greater penetration through denser tissues. As a result, the overall intensity of the x-ray beam is enhanced, allowing it to produce clearer images of structures within the body, particularly in areas with higher attenuation, such as bones.

This increased penetrability is particularly advantageous in various clinical scenarios, as it allows for better visualization of different tissues, reducing the likelihood of artifacts and enhancing image quality. Understanding the interplay between kV settings and beam properties is crucial for CT technologists in optimizing scan protocols for diagnostic imaging.

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It causes beam intensity to fluctuate

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