[A pilot study of contrast medium dose reduction using low tube voltage and iterative reconstruction: computed tomography angiography of the head].

This study aimed to reduce contrast medium dose without reducing the diagnostic capability of computed tomography (CT) angiography of the head. We evaluated the advanced statistical iterative reconstruction (ASiR) settings to adjust to low tube voltage CT. A syringe phantom was constructed using dilute contrast medium and was imaged at tube voltages of 80-120 kV.

[Development of a radioactive pharmaceuticals management system using a Web-based system].

Systems for recording data on radiopharmaceuticals have changed following the Medical Care Law on concentration limits of radioisotopes in drainage, exhaust gas, and the atmosphere. A Web-based system that includes a patient information subsystem, DICOM imaging subsystem, and laboratory order subsystem has been developed for the receipt, use, stock prescription, disposal, and accounting of radiopharmaceuticals was developed using a Web-based system in order to simplify radiation safety management operations such as changes and additions to record book forms. In verifying the usefulness of the system and its recording and search times, it was found that the new Web-based system provides superior performance.