What pixel size results from a 3D acquisition using a 260mm FOV and a 320 x 320 matrix?

To determine the pixel size resulting from a 3D acquisition using a 260 mm field of view (FOV) and a 320 x 320 matrix, you can use the formula for calculating pixel size, which is derived from dividing the FOV by the matrix size.

The formula for pixel size is:

Pixel Size = FOV / Matrix Size

For a FOV of 260 mm and a matrix of 320 x 320:

1. Calculate the pixel size:

• Pixel Size in one dimension (width or height) = FOV / Matrix Size

• Pixel Size = 260 mm / 320 = 0.8125 mm

Since this is a square matrix, the pixel size will be the same in both dimensions, resulting in a pixel size of approximately 0.81 mm x 0.81 mm.

This value is reflected in option C, which indicates a pixel size of 0.81 x 0.81 mm. Therefore, this choice correctly represents the calculated pixel size for the given FOV and matrix size.