We have conducted a questionnaire survey every 5 years from 1974 to grasp the existing status of X-ray equipment. This time, we will report on the results of the fiscal 2015 diagnostic X-ray equipment questionnaire survey. Compared to the previous survey on X-ray equipment, there has been a progress in the introduction of inverter type X-ray generators and image receptor systems in digital systems. We think that this transition will be occurred when the X-ray equipment are updated. In addition, there has been an increase in digital breast tomosynthesis (DBT) and the use of tungsten anodes in the X-ray tubes of mammography apparatuses. X-ray equipment management was performed in many facilities. It seems that the importance of quality control of X-ray equipment is being realized. Constancy tests corresponding to digital systems were conducted at each facility. Maintenance by manufacturers has also increased. This is considered to be because the equipment management of digital systems has become difficult. We believe that it is necessary to continue the survey on the status of diagnostic X-ray equipment.
Keywords: constancy test; high-voltage equipment; inverter-type device.