Computed Tomography Technologist Practice Exam

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What does the display field of view (DFOV) determine in CT imaging?

The maximum slice thickness that can be scanned

The amount of raw data used to create an image

The display field of view (DFOV) in CT imaging is crucial as it determines the specific area of the scanned data that is displayed in the final image. By selecting the DFOV, a technologist can choose how much of the collected raw data will be displayed, effectively controlling the amount of data that contributes to the image. A smaller DFOV generally results in a more focused view of a specific area, which can enhance the detail of that region.

Choosing the appropriate DFOV can influence the visibility of structures and can help to improve the diagnostic quality of the images produced. In contrast to other factors like slice thickness, image resolution, or patient positioning—none of which are directly determined by DFOV—the focus here is on the extent of raw data that is processed for visualization. Thus, DFOV is integral for optimizing the presentation of the image while ensuring relevant anatomical structures are effectively depicted.

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The resolution of the final image product

The patient positioning protocols

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