Calculate the pixel area for the following sequence: TR 4000, TE 120, FOV 36cm, 408 x 512 matrix, 2 NEX, ETL 12.

To determine the pixel area in an MRI sequence, you need to understand how to calculate it using the field of view (FOV) and the matrix size. The pixel area is derived from the FOV in both the frequency and phase encoding directions, which are typically equal unless specified otherwise (as is the case with a square FOV and matrix).

Given the parameters:

• FOV: 36 cm (which is 360 mm, as 1 cm = 10 mm)

• Matrix: 408 x 512

First, calculate the pixel size in millimeters.

1. For the frequency direction:

• Pixel size (frequency) = FOV / matrix size in that direction

• Pixel size (frequency) = 360 mm / 508 = approximately 0.707 mm

2. For the phase direction:

• Pixel size (phase) = FOV / matrix size in that direction

• Pixel size (phase) = 360 mm / 408 = approximately 0.882 mm

To find the pixel area, you multiply the pixel sizes for frequency and phase:

Pixel Area = Pixel Size (Frequency) x Pixel Size (Phase)

Pixel Area = (0.707 mm) x (