Given FOV = 22 cm x 16 cm and matrix = 512 x 192, what is the phase resolution?

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To calculate the phase resolution, one needs to determine how finely the imaged region is sampled in the phase encoding direction. Phase resolution is calculated using the formula:

Phase Resolution = FOV (in the phase direction) / Matrix Size (in the phase direction)

From the given information, the field of view (FOV) in the phase encoding direction is 16 cm, and the matrix size in that same direction is 192 pixels.

First, convert the FOV from centimeters to millimeters to maintain consistent units:

16 cm = 160 mm

Next, we apply the formula:

Phase Resolution = 160 mm / 192 = 0.833 mm

This rounds to approximately 0.83 mm, which corresponds to the provided answer choice. This value indicates the spatial resolution of the imaging in the phase encoding direction, showing how the data is sampled to create the final image. A finer phase resolution allows for improved image quality and detail, which is crucial in MRI for accurate diagnostics.

Understanding the relationship between field of view, matrix size, and phase resolution is essential for optimizing imaging parameters in MRI procedures.

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