The initial cost of X-ray and Gamma machines is very similar.

X-ray generators must be replaced every five to seven years at a cost of $6,000 for a new unit and about $3,000 for a refurbished unit with return of the replacement.    Over a 20-year period of operation, the cost can be in the range of $6,000 to $18,000. In addition, there is the cost of the electricity needed to operate and cool the X-ray generator. The electricity cost will vary depending on usage.  Finally, there is line down time from the X-ray tube exchange process.

Gamma sources require a wipe test every three years at a cost of $50 per wipe test. Over a 20-year period of operation, the average cost of wipe tests is $350, excluding cost of service.  There is no electricity requirement for a Gamma source and there is no significant down time for periodic wipe tests.