The image scale between the object plane and the sensor (usually, but not entirely accurately, referred to as the magnification) is in principle greater for large sensors with large pixels, because a greater distance is needed to form an image of the object for the same cone angle size. However, this is only an illusionary advantage. The image scale must always be considered in conjunction with the pixel size of the sensor. The size of the voxels in the object plane is critical for the resolution and thus the measurement error. With the same number of pixels, a smaller sensor using less installation space provides the same resolution in the object plane as a large sensor with a larger installation space. The resolution can be increased by using a sensor with more pixels or by raster tomography.

See in the image above:  Magnification and measurement range for different sensor sizes – resolution is independent of the sensor size:  a) Large sensor b) Small sensor