Table 1.

Estimated volumes of image data generated by the three main digital imaging modalities based on the current number of studies performed

Modality	Studies/year	MB/study	Est Total vol. (GB)
CT	6000	250	1500
MR	4000	40	160
Dig RX	5000	15	75
Total			1735

These volumes are based on uncompressed data; lossless compression can reduce these volumes by half