Which lines in k-space contain the majority of spatial resolution information?

In the context of MRI and k-space, the lines in k-space that contain the majority of spatial resolution information are indeed the outer lines. Spatial resolution in MRI is determined by the ability to distinguish between closely spaced structures, which is influenced by the amount of high-frequency information collected during imaging.

The outer lines in k-space correspond to higher spatial frequencies, which are crucial for capturing the fine details of the anatomy. When an image is reconstructed from the k-space data, the outer lines contribute to the high-frequency components that enhance image sharpness and allow for better differentiation of structures. Conversely, the central lines in k-space primarily convey low-frequency information, which relates more to the overall contrast and brightness of the image but does not enhance spatial resolution as effectively as the outer lines.

Thus, the importance of outer lines in k-space is fundamental to achieving high spatial resolution in MRI imaging, making them essential for accurate and detailed representation of the scanned anatomy.