No.4（2001）25.Improvement of safety and accuracy of a highly sensitive X-ray inspection system

Noboru SAKURAI, Akiharu KITAHARA, Yoshihiko WATANABE, Masakazu TOMITA, Yasuhiro OSHIMA and Takamasa KANAZAWA

For the purpose of improving the safety and accuracy of an X-ray inspection system, the dose distribution of the irradiation field was measured by utilizing imaging plates and portable X-ray dosemeters. The images acquired by imaging plates showed the circular high density areas at the center, which were caused by restriction of the X-rays by the irradiation cone attached around the X-ray tube. The densities in the images corresponded to the relative dose intensities. These provided the relative dose distribution of the irradiaion field. The dose distribution measured by a portable dosemeter showed similar results. It was also shown that this circular effective irradiation field was controllable by varying the length of the irradiation cone. Optimizing the dose and irradiation field by an irradiation cone is useful and important for improving the safety and the sensitivity of the inspection equipment.

Keywords
X-ray, X-ray inspection, Dose distribution, Imaging plate, Portable dosemeter, Irradiation cone, Radiation safety

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