[Radiation Dose to Patients Undergoing X-ray Diagnosis, Treatment and Follow-up for Cerebral Aneurysms].

This study aimed to evaluate radiation doses to patients undergoing X-ray diagnosis, treatment, and follow-up for cerebral aneurysms. Radiation doses were measured for computed tomography angiography (CTA), cerebral angiography (CAG), and interventional neuroradiology (IVNR) by using small-sized silicon-photodiode dosimeters, which were implanted at various tissue and organ positions within an anthropomorphic phantom. Lens doses, brain doses, and effective doses obtained in this study were 26mGy, 67mGy, and 4.

[Radiation dose evaluation in 3D rotation angiography and cone-beam computed tomography with a flat panel detector].

The aim of this study was to evaluate radiation dose in patients undergoing three-dimensional rotation angiography (3DRA) and cone-beam computed tomography (CBCT) using a flat panel detector (FPD). Radiation doses were measured for angiography equipment using small silicon-photodiode dosimeters that were implanted in various positions in tissues and organs within an anthropomorphic phantom of a standard Japanese adult male. Output signals from the dosimeters were read out on a computer, from which organ and effective doses were calculated according to guidelines published in International Commission on Radiological Protection Publication 103.

[Measurement of area of surplus X-ray radiation by dose-area product meter at image intensifier in angiography X-ray units].

The aim of this study was to assess the area of surplus X-ray radiation (surplus area) of three image intensifiers (I.I.) of two angiography X-ray units.

[Dose evaluation of a flat-panel detector system].

We compared the INNOVA2000 (INNOVA), which has a flat panel detector system, and the Advantx LCLP (LCLP), which has a conventional I. I. system, in terms of the dependence of phantom thickness on patient surface dose (surface dose) and receptor entrance dose (entrance dose).