[Appraising the storing of X-ray images]

We compared the cost to store X-ray films among storing them by themselves, utilizing rental stock, converting to microfilm and entering images into optical file system. We used microcomputer and spread sheet system on it for this comparison. Storing X-ray films by themselves is the most inexpensive, but the cost is depend on the price of land. Rental stock is the second. If the price of land is high, microfilm is most inexpensive. Optical file system is much expensive. It is not suit to store X-ray images which are already being stored as X-ray films. Beside of the cost, we should also estimate the factors as accessibility to image, easiness of use the systems etc.