What factor controls Pixel Dimension?

Pixel dimension is determined by the matrix size and the field of view (DFOV). The matrix size refers to the number of pixels in the image, which is expressed as a combination of rows and columns. For instance, a larger matrix size means more pixels, which directly affects the pixel dimensions. Smaller pixel dimensions yield greater detail and resolution in the image.

While slice thickness, image noise, and DFOV may influence other aspects of image quality and presentation, they do not directly dictate the pixel dimension itself. Slice thickness relates to the measurement of the volume of tissue being imaged, image noise refers to the graininess or randomness in the image that can mask important structures, and DFOV influences the area of the patient that is imaged and can impact how the pixel dimension is perceived, but the fundamental control of pixel dimension lies in the matrix size. Thus, the selection of matrix size directly influences the final image's pixel dimension, making it the correct factor.