Compared to a pitch of 1, what changes are observed with a pitch of 1.137? (Select three)

Compared to a pitch of 1, what changes are observed with a pitch of 1.137? (Select three)

• A. Decreased scan time
• B. Decreased rotation time
• C. Decreased image noise
• D. Decreased spatial resolution

Answer: (A)

When the pitch is increased from 1 to 1.137 in a computed tomography (CT) scan, certain changes in scan performance and image quality can be observed. A pitch greater than 1 indicates that the table moves farther in one complete rotation of the gantry compared to the body thickness being exposed. This adjustment has specific implications. One significant change is the decreased scan time. With a pitch of 1.137, the system covers more anatomy per rotation due to the increased distance the table moves in relation to the beam width. This effectively reduces the time needed to complete the scan, making the process quicker for the patient and the operator. Utilizing a greater pitch enhances the efficiency of the scan without sacrificing essential technical qualities. While there are other changes related to image quality with varying pitch settings, decreased scan time is a key benefit of increasing the pitch in CT imaging. This enhanced speed can be critical, particularly in emergency or time-sensitive situations, allowing for faster diagnosis and treatment. In contrast, higher pitch values can often lead to changes in image noise and spatial resolution, with effects that may not be as straightforwardly beneficial compared to the increase in efficiency observed with decreased scan time.

When the pitch is increased from 1 to 1.137 in a computed tomography (CT) scan, certain changes in scan performance and image quality can be observed. A pitch greater than 1 indicates that the table moves farther in one complete rotation of the gantry compared to the body thickness being exposed. This adjustment has specific implications.

One significant change is the decreased scan time. With a pitch of 1.137, the system covers more anatomy per rotation due to the increased distance the table moves in relation to the beam width. This effectively reduces the time needed to complete the scan, making the process quicker for the patient and the operator. Utilizing a greater pitch enhances the efficiency of the scan without sacrificing essential technical qualities.

While there are other changes related to image quality with varying pitch settings, decreased scan time is a key benefit of increasing the pitch in CT imaging. This enhanced speed can be critical, particularly in emergency or time-sensitive situations, allowing for faster diagnosis and treatment.

In contrast, higher pitch values can often lead to changes in image noise and spatial resolution, with effects that may not be as straightforwardly beneficial compared to the increase in efficiency observed with decreased scan time.