[Evaluation of AEC Consistency in Digital X-ray Imaging Systems].

The Japan Network for Research and Information on Medical Exposures (J-RIME) established the diagnostic reference level (DRL) and is advancing optimization of radiation protection. We believe that the difference in the imaging dose between facilities may be due to the fact that automatic exposure control (AEC) adjustment is not unified among manufacturers. The consistency of AEC is specified in JIS 4751-2-54, but it is not applicable to digital X-ray imaging systems because it is for optical density of analog X-ray imaging systems.

[Report Based on Fiscal 2015 Diagnostic X-ray Equipment Questionnaire Survey].

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.

[Report based on fiscal 2010 diagnostic X-ray equipment questionnaire survey (conditions of radiography)].

This is the eighth investigation which has been carried out every 5 years since 1974 for the purpose of grasping the trend of X-ray devices and the radiographic condition. We gathered it up mainly on a radiographic condition, in this report. As for the chest radiography and double contrast gastrography, introduction of the flat panel detector (FPD) advanced in comparison with the last survey.