What computed tomography (CT) data acquisition mode describes a specific scanning method?

What computed tomography (CT) data acquisition mode describes a specific scanning method?

• A. Axial mode
• B. Helical mode
• C. Volume mode
• D. Dynamic mode

Answer: (A)

Axial mode refers to a specific method of data acquisition in computed tomography (CT) that involves acquiring images one slice at a time. In this mode, the x-ray tube rotates around the patient to collect data in thin slices, which are later reconstructed into cross-sectional images. Each slice is obtained sequentially, meaning that the patient must remain stationary during the scanning of each individual slice. In contrast, helical mode allows the x-ray tube to continuously rotate around the patient while the patient is also moving through the scanner, resulting in a spiral path of data acquisition. Volume mode builds on this concept, as it refers to the acquisition of a complete three-dimensional dataset in a single rotation, which is often associated with multi-slice or spiral CT systems. Dynamic mode typically refers to rapid imaging sequences that capture changes over time, such as in perfusion studies. Thus, axial mode is defined by its specific, slice-by-slice approach, making it a distinct scanning method compared to the others listed.

Axial mode refers to a specific method of data acquisition in computed tomography (CT) that involves acquiring images one slice at a time. In this mode, the x-ray tube rotates around the patient to collect data in thin slices, which are later reconstructed into cross-sectional images. Each slice is obtained sequentially, meaning that the patient must remain stationary during the scanning of each individual slice.

In contrast, helical mode allows the x-ray tube to continuously rotate around the patient while the patient is also moving through the scanner, resulting in a spiral path of data acquisition. Volume mode builds on this concept, as it refers to the acquisition of a complete three-dimensional dataset in a single rotation, which is often associated with multi-slice or spiral CT systems. Dynamic mode typically refers to rapid imaging sequences that capture changes over time, such as in perfusion studies.

Thus, axial mode is defined by its specific, slice-by-slice approach, making it a distinct scanning method compared to the others listed.