In this example, there are two contiguous 5mm slices. What is the interval?

In this example, there are two contiguous 5mm slices. What is the interval?

• A. 2.5mm
• B. 10mm
• C. 5mm
• D. 7.5mm

Answer: (C)

To determine the interval for two contiguous 5mm slices, it is important to understand what is meant by "contiguous." In imaging, contiguous slices mean that there is no space or gap between the slices; they lay directly next to one another. When two slices are each 5mm thick and placed one on top of the other without any gaps, the distance from the top of the first slice to the top of the second slice is exactly the thickness of one slice. Since each slice contributes its entire thickness to the total coverage, the interval between the edges of two contiguous slices remains at the thickness of one slice— which is 5mm. Thus, the interval between the top of one slice and the top of the next slice is indeed the thickness of one slice, confirming that the interval is 5mm. This understanding is fundamental in imaging as it impacts the resolution and the detail captured in a sequence of slices during a PET/CT scan.

To determine the interval for two contiguous 5mm slices, it is important to understand what is meant by "contiguous." In imaging, contiguous slices mean that there is no space or gap between the slices; they lay directly next to one another.

When two slices are each 5mm thick and placed one on top of the other without any gaps, the distance from the top of the first slice to the top of the second slice is exactly the thickness of one slice. Since each slice contributes its entire thickness to the total coverage, the interval between the edges of two contiguous slices remains at the thickness of one slice— which is 5mm.

Thus, the interval between the top of one slice and the top of the next slice is indeed the thickness of one slice, confirming that the interval is 5mm. This understanding is fundamental in imaging as it impacts the resolution and the detail captured in a sequence of slices during a PET/CT scan.