What will the pitch be if the table moves equal distance to the width of the beam in spiral acquisition mode?

What will the pitch be if the table moves equal distance to the width of the beam in spiral acquisition mode?

• A. Less than 1
• B. Equal to 1
• C. Greater than 1
• D. None of the above

Answer: (B)

In spiral acquisition mode, the pitch is defined as the ratio of the distance the table moves during one rotation of the x-ray tube to the width of the x-ray beam. When the table moves equal to the width of the beam, the pitch is calculated to be exactly one. This means that for every rotation of the x-ray tube, the table advances by a distance that is precisely equal to the beam width, resulting in a pitch of 1. This scenario indicates a well-balanced translation of the table in relation to the beam coverage, allowing for optimal data collection and reconstruction of images without overlapping or gaps in the slices. A pitch of 1 is often considered the baseline for efficient imaging in spiral or helical CT scans, ensuring that the entire volume of interest is scanned uniformly. Understanding pitch is crucial in optimizing CT scan parameters, as it influences image quality, scan time, and radiation dose, thereby enhancing the overall effectiveness of diagnostic imaging.

In spiral acquisition mode, the pitch is defined as the ratio of the distance the table moves during one rotation of the x-ray tube to the width of the x-ray beam. When the table moves equal to the width of the beam, the pitch is calculated to be exactly one. This means that for every rotation of the x-ray tube, the table advances by a distance that is precisely equal to the beam width, resulting in a pitch of 1.

This scenario indicates a well-balanced translation of the table in relation to the beam coverage, allowing for optimal data collection and reconstruction of images without overlapping or gaps in the slices. A pitch of 1 is often considered the baseline for efficient imaging in spiral or helical CT scans, ensuring that the entire volume of interest is scanned uniformly.

Understanding pitch is crucial in optimizing CT scan parameters, as it influences image quality, scan time, and radiation dose, thereby enhancing the overall effectiveness of diagnostic imaging.