Computed Tomography Technologist Practice Exam

Question: 1 / 615

What is the significance of overscan in CT imaging?

It increases the resolution of the image

Enhances the density of the scan

Adds a tube arc of greater than 360 degrees to address motion artifacts

Overscan in CT imaging refers to the scanning process where the x-ray tube rotates through an angle greater than 360 degrees. This technique helps to address motion artifacts that can occur due to patient movement during the scan. By overscanning, the system captures additional data from the area of interest, which aids in reconstructing images with improved accuracy and clarity, ultimately enhancing the quality of the final images.

This process can also facilitate better visualization of anatomical structures by mitigating the impact of motion, as the additional data collected helps fill in gaps that might occur due to slight movements. The inclusion of these extra data points is crucial in improving the diagnostic value of the scans, providing clearer images that are essential for accurate interpretation by healthcare professionals.

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Reduces radiation dose to the patient

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