This detailed study of a stable population compares the number and type of diagnostic radiology examinations, facilities, equipment, personnel and financial allocations for the years 1974 and 1979. The data have been obtained from $12.28 to $25.90. A computed tomography service began in 1977. The 1979 genetically significant radiation dose to the population is calculated to be 260 microgray. Continuing growth in computed tomography and diagnostic ultrasound with changing referrals for nuclear medicine are not yet ready for analysis.