Patient dose calculated from exposure parameters on abdominal X-ray examination: phantom experiments and clinical...

In the field of radiology, new modalities have been developed and expanded. However, X-ray-based diagnostic imaging remains the main stream. Therefore, radiological technologists must provide dosimetry and other physical data related to radiation exposure. In this report, the basic information presented in our previous reports is supplemented with data regarding the relationships between exposure parameters and dose for inverter-type X-ray generators, which have been widely adopted in recent years. This report also describes the measurement of percentage depth dose. We also conducted a survey of medical facilities in Okayama prefecture to gather data concerning the radiographic parameters used for abdominal examinations, and calculated the patient dose from these data. We tabulated and calculated the patient dose for each hospital. The results showed a wide range of variation. The overall mean values were 0.337 cGy for the surface dose and 0.061 cGy for the dose at a depth of 9 cm.