Sonometry and densitometry medical diagnostic devices enabled for per-use patient examinations charged via internet connections to financial cards

A system of fee-per-exam charging for the use of medical devices such as bone sonometers and x-ray densitometers. The customer or custodian of the device purchases a number of patient exams from the manufacturer or supplier of the equipment over an Internet connection with the company web site and receives a unique code that, when entered into the equipment, enables it to carry out the purchased number of patient examination and thereafter become disabled.