Final answer:
Helical scanning provides several advantages over axial scanning in computed tomography (CT) imaging, including reduced scan time, less motion artifacts, and improved image quality.
Step-by-step explanation:
Helical scanning provides several advantages over axial scanning in computed tomography (CT) imaging. Some of these advantages include:
Reduced scan time: Helical scanning enables continuous rotation of the X-ray tube and detector array around the patient, allowing for faster image acquisition compared to axial scanning where the tube and detectors have to stop and move to the next slice.
Less motion artifacts: With helical scanning, the patient can be scanned while in motion, reducing the likelihood of motion artifacts appearing in the images.
Improved image quality: Helical scanning provides better image quality with higher spatial resolution and better visualization of structures, especially for dynamic exams like cardiac imaging.
However, helical scanning does not have an advantage over axial scanning when it comes to radiation dose, as both techniques expose patients to similar doses of radiation.