More pixels in an image matrix results in:

Higher image resolution is achieved by increasing the number of pixels in an image matrix. Resolution refers to the amount of detail an image holds, and this is directly related to pixel density—the more pixels available in a specific area, the finer the details that can be represented.

When an image has more pixels, each pixel represents a smaller portion of the overall image, allowing for a more precise and clearer representation of the subject being imaged. This results in sharper details and improved clarity, which are essential in various medical imaging applications, where accuracy and detail can significantly impact diagnosis and treatment planning.

In this context, while options regarding scan time, image quality, or lower resolution do not apply, their consideration helps highlight the direct correlation between pixel quantity and image clarity. Thus, having more pixels is essential for achieving higher image resolution.