In digital imaging, spatial resolution improves with which of the following?

The enhancement of spatial resolution in digital imaging is fundamentally tied to the size of pixels and the dimensions of the image matrix. Smaller pixel sizes allow for more pixels to be packed into a given area, which provides a higher level of detail in the images produced. A larger image matrix complements this by increasing the total number of pixels available to capture and represent the image, further refining detail and improving clarity.

Together, a smaller pixel size and a larger image matrix enable the digital imaging system to detect finer structures and variations in the imaged subject, delivering superior spatial resolution. This is key in medical imaging, where accurately distinguishing between small anatomical features can be critical for diagnosis and treatment planning.

In contrast, simply increasing image size or focusing solely on pixel pitch would not yield the same significant improvements in spatial resolution as the combination of smaller pixels and a larger matrix does.