How does the CT scanner achieve axial and helical data acquisition?

How does the CT scanner achieve axial and helical data acquisition?

• A. By adjusting the exposure time of x-ray beams
• B. By manipulating the rotation and movement of the x-ray tube and patient table
• C. Using stationary detectors to capture images
• D. Through a single tube rotation at a fixed angle

Answer: (B)

The correct option highlights the role of the x-ray tube rotation and patient table movement in gaining axial and helical data acquisition. In axial data acquisition, the CT scanner captures images of the body slice-by-slice. The x-ray tube rotates around the patient to acquire data from different angles as the patient table remains stationary between exposures. In contrast, helical (or spiral) data acquisition involves a continuous movement where the x-ray tube rotates around the patient while the patient table moves simultaneously, creating a spiral path. This allows for the collection of volumetric data rather than discrete slices, leading to improved image reformation and analysis. By effectively manipulating both the rotation of the x-ray tube and the movement of the patient table, the CT scanner can optimize data collection for high-quality images, enhancing diagnostic capabilities.

The correct option highlights the role of the x-ray tube rotation and patient table movement in gaining axial and helical data acquisition.

In axial data acquisition, the CT scanner captures images of the body slice-by-slice. The x-ray tube rotates around the patient to acquire data from different angles as the patient table remains stationary between exposures. In contrast, helical (or spiral) data acquisition involves a continuous movement where the x-ray tube rotates around the patient while the patient table moves simultaneously, creating a spiral path. This allows for the collection of volumetric data rather than discrete slices, leading to improved image reformation and analysis.

By effectively manipulating both the rotation of the x-ray tube and the movement of the patient table, the CT scanner can optimize data collection for high-quality images, enhancing diagnostic capabilities.