How many voxels are in an MRI?

Could you please elaborate on the concept of "voxels" and their significance in the context of an MRI scan? Are you referring to the discrete volumetric elements that represent the spatial resolution of the scan, and if so, how does one determine the exact number of voxels in a given MRI image? Additionally, are there any factors that influence the number of voxels, such as the scanner's resolution or the size of the scanned area? I'm curious to understand the relationship between voxels and the quality and accuracy of the MRI results.